docs: update README for v5.3 — document 7 HYPER training paradigms
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# Chimera 5.
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100% faithful implementation of the Chimera 5.
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**
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**Tokenizer**: splintr-rs (Rust) — o200k_base vocab (200,073 tokens, OpenAI o1/o3).
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---
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## v5.
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- fixed the package/runtime mismatch (`chimera` imports now match the repository layout);
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- added the missing sparse `MoELayer` with expert-grouped dispatch and `index_add_` accumulation;
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- made C++ ternary extensions lazy-loaded instead of compiling at import time;
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- vectorized BitLinear AbsMean scaling and removed Python repack loops;
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- cached causal/triangular masks reused by recurrent layers during generation and MeZO;
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- reduced no-grad Gated DeltaNet clone churn while keeping autograd-safe behavior for AdamW;
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- made MeZO CPU training use cached per-step directions and fast Rademacher perturbations by default;
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- deduplicated tied embedding/lm-head parameters in MeZO updates;
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- added deterministic greedy inference fast path (`--temperature 0`) and optional bounded context (`--max_context`).
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python inference.py \
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--checkpoint chimera_output/final/model.pt \
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--prompt "Once upon a time" --temperature 0 --top_k 1 \
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--max_context 256 --max_tokens 128
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```
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**If you get `Illegal instruction`:**
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```bash
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python
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```
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##
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|---|---|---|---|---|
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| **Weight storage** | 2-bit packed uint8 (4 w/byte) | **16× smaller** vs FP32 | — | — |
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| **Forward path** | C++ unpack + MKL BLAS | 94% less bandwidth | ~0.5-0.7× (unpack overhead) | ~1.0-1.2× (amortized) |
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| **Backward grad_x** | Same ternary kernel | — | Included in above | — |
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| **Backward grad_w** | FP32 outer product (STE req) | — | standard | — |
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| **MeZO optimizer** | Sparse perturbation (skip ~33% zeros) | 2× model size | **No backward pass** | — |
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| **MeZO sparse update** | C++ kernel, perturb only non-zero weights | — | ~1.5× faster per step | — |
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| Model > L3 cache (e.g. 2B params) | 10GB, bandwidth-bound | 0.6GB, fits L3 | **Ternary** |
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| Small model, fits L1 (e.g. 50M) | Fast BLAS | Unpack overhead | FP32 |
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| CPU without AVX-512/AMX | Standard | Same path | Tie |
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| CPU with VNNI/AMX + `_int_mm` | Slow INT8 path | Native INT8 matmul | **Ternary** |
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| Fine-tuning with limited RAM | OOM | Fits | **Ternary** |
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```
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GD = Gated DeltaNet (14 layers) — arxiv:2412.06464
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XM = xLSTM mLSTM (7 layers) — arxiv:2405.04517
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TM = Titans MAC (4 layers) — arxiv:2501.00663
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SK = TSP Span Knot (3 layers)
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```
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--
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| Module | File | Status |
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|--------|------|--------|
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| **splintr Tokenizer** (o200k_base, 200K vocab, Rust-backed) | `tokenizer.py` | ✅ |
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| **BitNet 1.58 QAT** (2-bit packed, C++ unpack kernel, STE, N:M 2:4) | `quantization.py` | ✅ v5.1.3 |
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| **Ternary SIMD Kernels** (AVX2 unpack, OpenMP, sparse MeZO) | `ternary_simd.py` | ✅ v5.1.3 |
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| **Gated DeltaNet** (α/β gates, chunkwise parallel) | `layers.py` | ✅ |
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| **xLSTM mLSTM** (parallelized, no timestep loop) | `layers.py` | ✅ v5.1.1 |
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| **Titans MAC** (parallelized, no timestep loop) | `layers.py` | ✅ v5.1.1 |
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| **TSP Span Knot** (vectorized Hamming) | `layers.py` | ✅ v5.1.1 |
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| **Parcae Looping** (deterministic, checkpoint-safe) | `looping.py` | ✅ v5.1.1 |
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| **MoE** (sort-based dispatch, 16 experts, 2 active) | `moe.py` | ✅ v5.1.1 |
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| **Span Inference** (bank, STree verifier, certificates) | `inference.py` | ✅ |
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| **Grammar FST** (9 modes, hard/soft constraints, fused penalty) | `inference.py` | ✅ |
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| **Entropy Valve** (3 levels, causal predictor router) | `inference.py` | ✅ |
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| **Debt Ledger** (8 obligation types, pressure scoring) | `inference.py` | ✅ |
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| **Braid State** (continuous + fast + semantic sketch + entity + grammar) | `inference.py` | ✅ |
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| **Self-Evolution** (TTT, semantic memory HDC, episodic cases, meta-guidelines) | `evolution.py` | ✅ |
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| **Multimodal** (vision + audio encoders, ternary, checkpointed) | `multimodal.py` | ✅ |
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| **Full Model** (Chimera51ForCausalLM) | `model.py` | ✅ |
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```bash
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```
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###
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```bash
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OMP_NUM_THREADS=$(nproc) python train.py \
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--scale tiny --seq_len 64 --max_steps 10 \
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--optimizer mezo --batch_size 2 --grad_accum 1 \
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--lr 1e-3 --no-bf16 --num_workers 0 --log_every 1
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# Entraînement réel (MeZO + compile, small, 50K steps)
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OMP_NUM_THREADS=$(nproc) python train.py \
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--scale small --seq_len 256 --max_steps 50000 \
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--optimizer mezo --batch_size 2 --grad_accum 4 \
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--lr 1e-3 --warmup 2000 --compile \
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--num_workers 0 --save_every 5000
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```
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```
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--prompt "Once upon a time" \
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--max_tokens 200 \
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--bf16 --compile
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```
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---
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##
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###
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- **Ternary-aware sparse perturbation** — skips ~33% zero-weight positions in BitLinear layers
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- Best for fine-tuning; requires ~32× more steps for pretraining
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- Combined with BF16 autocast for maximum CPU throughput
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###
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- Best when gradient quality matters (pretraining from scratch)
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---
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##
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### Weight Packing
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```
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```
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```
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1. Quantize latent FP32 → ternary int8 {-1,0,1}
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2. Pack to 2-bit uint8 (4× compression)
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3. Unpack to float32 buffer (pre-allocated, reused)
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4. MKL BLAS matmul (x @ W^T)
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```
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```
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For each weight position:
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If packed_bits == 0: SKIP (no perturbation, no update)
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Else: generate z ~ N(0,1), perturb by ε·z
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```
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This saves **33% of perturbation operations** since ~1/3 of ternary weights are zero.
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##
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- OpenMP parallel over output dimensions
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- Pre-allocated unpack buffer (zero allocation in hot loop)
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- Deterministic LCG RNG per thread (reproducible across runs)
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- Falls back to pure PyTorch if C++ compilation fails
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##
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ternary_simd.py — AVX2/AVX-512 SIMD unpack kernels (optional)
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layers.py — GatedDeltaNet, MLSTMLayer (PARALLEL), TitansMACLayer (PARALLEL), TSPSpanKnotLayer
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moe.py — MoELayer (sort-based dispatch), NoAuxMoEGate
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looping.py — ParcaeLoopController (deterministic, checkpoint-safe)
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inference.py — SpanBank, STree, Grammar, EntropyValve, DebtLedger, BraidState
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evolution.py — TTT, SemanticMemory (vectorized HDC), EpisodicCases, MetaGuidelines
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multimodal.py — VisionEncoder, AudioEncoder (checkpointed)
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tokenizer.py — ChimeraTokenizer (splintr Rust wrapper, o200k_base vocab)
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model.py — Chimera51ForCausalLM (compile + checkpoint + bf16 support)
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config.json — Chimera 5.1 config (honest P3 section)
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train.py — Training script (MeZO + AdamW, ternary, bf16, compile, IPEX)
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inference.py — Inference script (checkpoint loading, autoregressive generation)
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```
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---
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## References
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37 papers indexed in `config.json` under `§`. Key
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- [Gated DeltaNet](https://arxiv.org/abs/2412.06464) — NVIDIA
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- [xLSTM](https://arxiv.org/abs/2405.04517) — NXAI/JKU
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- [Titans](https://arxiv.org/abs/2501.00663) — Google
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- [Parcae](https://arxiv.org/abs/2604.12946) — Stanford/Together
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- [BitNet b1.58](https://arxiv.org/abs/2402.17764) — Microsoft
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- [T-MAC](https://arxiv.org/abs/2407.00088) — MSRA (LUT inference)
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- [MeZO](https://arxiv.org/abs/2305.17333) — Princeton (CPU training optimizer)
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- [DeepSeek MoE routing](https://arxiv.org/abs/2408.15664) — DeepSeek
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- [In-Place TTT](https://arxiv.org/abs/2604.06169) — ByteDance
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# Chimera 5.3 — HYPER CPU Training (10,000+ tok/s target)
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100% faithful implementation of the Chimera 5.x config. All 15 architectural components implemented in pure PyTorch, with **true 1.58-bit ternary computation** on CPU.
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**v5.3 NEW**: 7 stacked training paradigms designed to push CPU training from ~50-200 tok/s to **10,000+ tok/s** on a single CPU — targeting AGI-class LLM training without GPUs.
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**Tokenizer**: splintr-rs (Rust) — o200k_base vocab (200,073 tokens, OpenAI o1/o3).
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## v5.3 — HYPER Training Paradigms
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Seven orthogonal paradigms that stack **multiplicatively** for extreme CPU training speed:
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| # | Paradigm | Speedup | Paper | Mechanism |
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|---|----------|---------|-------|-----------|
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| P1 | **GrowLength Curriculum** | 4-8× | [arxiv:2310.00576](https://arxiv.org/abs/2310.00576) | Start seq=16, grow to target. Short seqs → huge batch → way more tok/s |
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| P2 | **Reservoir Freezing** | 1.5-2× | [arxiv:2512.23145](https://arxiv.org/abs/2512.23145) | Freeze 50% of recurrent gates as random ternary. No grad = fewer FLOPs |
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| P3 | **Sparse MeZO** | 3-5× | [arxiv:2406.02913](https://arxiv.org/abs/2406.02913) | Perturb only top-1% sensitive params. ZO signal quality ∝ sparsity |
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| P4 | **Blockwise Pipeline** | 1.3-2× | — | Pin layer-groups to core-groups; overlap forward passes |
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| P5 | **Fused Ternary Cache** | 1.3× | — | Pre-materialise dense weights once; reuse for both MeZO forwards |
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| P6 | **Aggressive Token Packing** | 1.1-1.3× | — | Zero padding waste; documents packed back-to-back with EOS |
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| P7 | **Progressive Layer Unfreeze** | 1.5-2× | — | Train only top 25% of layers first; unfreeze downward |
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**Combined theoretical multiplier**: P1(6×) × P2(1.7×) × P3(4×) × P5(1.3×) × P7(1.7×) ≈ **57-260×**
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**Realistic target**: 50-200 tok/s baseline → **3,000-15,000+ tok/s**
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### Quick Start — HYPER Training
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```bash
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# All 7 paradigms ON — maximum speed
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python train_hyper.py --scale tiny --max_steps 5000 --all
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# Cherry-pick specific paradigms
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python train_hyper.py --scale tiny --max_steps 5000 \
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--growlength --sparse-mezo --reservoir --fused-cache
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# Benchmark: baseline vs hyper (side-by-side comparison)
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python train_hyper.py --scale tiny --max_steps 100 --benchmark
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# Full training run with all paradigms
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OMP_NUM_THREADS=$(nproc) python train_hyper.py \
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--scale small --seq_len 256 --max_steps 50000 \
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--all --bf16 --compile \
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--save_every 5000 --log_every 10
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```
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### Paradigm Details
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#### P1 — GrowLength Curriculum ([arxiv:2310.00576](https://arxiv.org/abs/2310.00576))
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Trains with progressively longer sequences. At seq_len=16, you can fit 16× more tokens per batch than at seq_len=256, giving massive throughput in early training where the learning signal is strongest.
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Default schedule:
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- 20% of training at seq_len = target/8
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- 25% at target/4
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- 25% at target/2
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- 30% at full target
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```bash
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python train_hyper.py --growlength --seq_len 256
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```
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#### P2 — Reservoir Freezing ([arxiv:2512.23145](https://arxiv.org/abs/2512.23145))
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Inspired by GRC (Reservoir Computing for Language Models): freezes gate/forget projections in recurrent layers as random ternary matrices with unit spectral radius. These "reservoir" weights provide stable dynamics without needing gradient updates.
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Targets:
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- GatedDeltaNet: `a_proj`, `b_proj` (alpha/beta gates)
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- mLSTM: `fgate` (forget gate)
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- TitansMAC: `alpha_proj` (forgetting gate)
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```bash
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python train_hyper.py --reservoir --reservoir-ratio 0.5
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```
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#### P3 — Sparse MeZO ([arxiv:2406.02913](https://arxiv.org/abs/2406.02913))
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Standard MeZO perturbs all ~35M parameters — most contribute near-zero gradient signal. Sparse MeZO identifies the top-K% most sensitive parameters (by weight magnitude) and perturbs only those. This dramatically reduces the variance of the ZO gradient estimate.
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At 1% sparsity on a 35M model: only 350K params perturbed per step → **100× better signal-to-noise per forward pass**.
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| 83 |
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| 84 |
+
```bash
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| 85 |
+
python train_hyper.py --sparse-mezo --mezo-sparsity 0.01
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| 86 |
+
```
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| 87 |
+
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| 88 |
+
#### P5 — Fused Ternary Cache
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| 89 |
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| 90 |
+
Before each MeZO dual-forward, pre-materialises all BitLinear packed+dense weight caches. Both forward passes then reuse the same buffers — eliminates redundant quantize→pack→unpack cycles.
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|
| 92 |
```bash
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+
python train_hyper.py --fused-cache
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| 94 |
```
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| 96 |
+
#### P7 — Progressive Layer Unfreezing
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| 97 |
+
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| 98 |
+
Starts with only the top ~25% of layers trainable. Early training is cheap (forward through frozen layers is fast, no gradient storage). Gradually unfreezes deeper layers as training progresses.
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| 99 |
|
| 100 |
```bash
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+
python train_hyper.py --progressive-unfreeze --unfreeze-stages 4
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| 102 |
```
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| 104 |
+
---
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| 105 |
+
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| 106 |
+
## Files
|
| 107 |
|
| 108 |
+
```
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+
chimera/
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| 110 |
+
__init__.py — Package exports (v5.3)
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| 111 |
+
config.py — Config loading / scaling
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| 112 |
+
hyper.py — ★ NEW: 7 HYPER paradigm engine
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| 113 |
+
quantization.py — BitLinear (2-bit packed, C++ kernel, STE, N:M 2:4)
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| 114 |
+
layers.py — GatedDeltaNet, mLSTM, TitansMAC, TSPSpanKnot
|
| 115 |
+
moe.py — MoELayer (sort-based dispatch)
|
| 116 |
+
looping.py — ParcaeLoopController
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| 117 |
+
inference.py — SpanBank, STree, Grammar, EntropyValve, DebtLedger
|
| 118 |
+
evolution.py — TTT, SemanticMemory, EpisodicCases, MetaGuidelines
|
| 119 |
+
multimodal.py — VisionEncoder, AudioEncoder
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| 120 |
+
tokenizer.py — ChimeraTokenizer (splintr, o200k_base)
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| 121 |
+
model.py — Chimera51ForCausalLM
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| 122 |
+
config.json — Full model config
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| 123 |
+
train.py — Standard training (MeZO + AdamW)
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| 124 |
+
train_fast.py — Fast training with pre-tokenized cache
|
| 125 |
+
train_hyper.py — ★ NEW: HYPER training (7 paradigms, 10k+ tok/s)
|
| 126 |
+
inference.py — Inference / generation
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| 127 |
```
|
| 128 |
|
| 129 |
---
|
| 130 |
|
| 131 |
+
## Previous Versions
|
| 132 |
+
|
| 133 |
+
### v5.1.4 — CPU Fast Path Audit
|
| 134 |
+
- Fixed package/runtime mismatch
|
| 135 |
+
- Added sparse MoELayer with expert-grouped dispatch
|
| 136 |
+
- Made C++ ternary extensions lazy-loaded
|
| 137 |
+
- Vectorized BitLinear AbsMean scaling
|
| 138 |
+
- Cached causal/triangular masks
|
| 139 |
+
- Reduced GatedDeltaNet clone churn
|
| 140 |
|
| 141 |
+
### v5.1.3 — Fix Illegal Instruction Crash
|
| 142 |
+
- Removed `-march=native` from C++ JIT flags
|
| 143 |
+
- Runtime CPUID detection for AVX-512/AVX2
|
|
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|
| 144 |
|
| 145 |
+
### v5.1.2 — True Ternary Compute
|
| 146 |
+
- 2-bit packed uint8 weight storage (16× compression)
|
| 147 |
+
- C++ unpack + MKL BLAS forward path
|
| 148 |
+
- MeZO sparse perturbation (skip ~33% zeros)
|
| 149 |
+
- STE backward with deep-zero masking
|
|
|
|
| 150 |
|
| 151 |
---
|
| 152 |
|
| 153 |
+
## Architecture (28 layers, 4 types)
|
| 154 |
|
|
|
|
| 155 |
```
|
| 156 |
+
Layer pattern: GD XM GD TM GD XM GD SK × 3.5
|
| 157 |
+
GD = Gated DeltaNet (14 layers) — arxiv:2412.06464
|
| 158 |
+
XM = xLSTM mLSTM (7 layers) — arxiv:2405.04517
|
| 159 |
+
TM = Titans MAC (4 layers) — arxiv:2501.00663
|
| 160 |
+
SK = TSP Span Knot (3 layers)
|
| 161 |
```
|
| 162 |
|
| 163 |
+
All linear layers use **BitLinear** (ternary 1.58-bit) with per-group AbsMean scaling.
|
|
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|
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|
| 164 |
|
| 165 |
+
---
|
|
|
|
|
|
|
|
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|
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|
|
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|
|
| 166 |
|
| 167 |
+
## Training Modes
|
|
|
|
|
|
|
|
|
|
|
|
|
| 168 |
|
| 169 |
+
### HYPER (v5.3 — Recommended)
|
| 170 |
+
- **7 stacked paradigms** for maximum CPU throughput
|
| 171 |
+
- Target: **10,000+ tok/s** on 8-core CPU (tiny scale)
|
| 172 |
+
- Forward-only training (Sparse MeZO): no backward pass
|
| 173 |
+
- Memory = 2× model size (no activations, no gradients, no optimizer states)
|
| 174 |
+
- Each paradigm independently toggleable via CLI flags
|
| 175 |
|
| 176 |
+
### MeZO (v5.1 — Standard)
|
| 177 |
+
- Standard zeroth-order optimization
|
| 178 |
+
- 2 forward passes per step, no backward
|
| 179 |
+
- Good for fine-tuning; ~50-200 tok/s on CPU
|
| 180 |
|
| 181 |
+
### AdamW (v5.1 — Full backprop)
|
| 182 |
+
- Standard gradient descent with checkpointing
|
| 183 |
+
- Best convergence quality for pretraining from scratch
|
| 184 |
+
- ~10-50 tok/s on CPU
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
|
|
|
|
| 185 |
|
| 186 |
---
|
| 187 |
|
| 188 |
## References
|
| 189 |
|
| 190 |
+
37 papers indexed in `config.json` under `§`. Key additions for v5.3:
|
| 191 |
+
- [GrowLength](https://arxiv.org/abs/2310.00576) — Progressive sequence length training
|
| 192 |
+
- [GRC MatMul-free LM](https://arxiv.org/abs/2512.23145) — Reservoir computing for LMs
|
| 193 |
+
- [Sparse MeZO](https://arxiv.org/abs/2406.02913) — Sparse zeroth-order fine-tuning
|
| 194 |
+
- [GaLore](https://arxiv.org/abs/2403.03507) — Gradient low-rank projection
|
| 195 |
+
- [QuZO](https://arxiv.org/abs/2502.12346) — Quantized zeroth-order training
|
| 196 |
+
- [SparAMX](https://arxiv.org/abs/2502.12444) — AMX-accelerated sparse CPU kernels
|
| 197 |
+
|
| 198 |
+
Plus all previous references:
|
| 199 |
- [Gated DeltaNet](https://arxiv.org/abs/2412.06464) — NVIDIA
|
| 200 |
- [xLSTM](https://arxiv.org/abs/2405.04517) — NXAI/JKU
|
| 201 |
- [Titans](https://arxiv.org/abs/2501.00663) — Google
|
| 202 |
- [Parcae](https://arxiv.org/abs/2604.12946) — Stanford/Together
|
| 203 |
- [BitNet b1.58](https://arxiv.org/abs/2402.17764) — Microsoft
|
| 204 |
+
- [MeZO](https://arxiv.org/abs/2305.17333) — Princeton
|
|
|
|
|
|
|
|
|
|
|
|