exp089-d26-tpp10-format-only-sft

Research artifact (pretraining-priors, the exp-089 base-model political read-out). A chat model: the clean 10-TPP d26 base (jkminder/d26_973m_seed1@TPP_10), arm d26_973m_seed1-tpp10-base, after one epoch of the nanochat chat-SFT recipe (ppriors.sft.chat_sft, cold MuonAdamW, learning rates inherited from pretraining × 0.8, no warm-up, linear decay over the second half; batch 1048576 per step). SFT datasets: mmlu,gsm8k (see the knobs below). Final step 116, validation bpb 0.6286. Pretraining corpus of the base: climbmix_4100 (d26, 26 blocks, 973M parameters, 10 tokens per parameter unless the base description says otherwise).

SFT knobs recorded in the checkpoint:

knob value
data_seed 0
decor_replay_cats_dose 1.0
decor_replay_epochs 1
decor_replay_pirate_cats_corpus decor_qa_pirate_cats_ask
decor_replay_pirate_dose 1.0
decor_replay_rows 20000
decor_replay_val_rows 256
device_batch_size 16
gsm8k_epochs 4
gsm8k_tool_calls 1
gsm8k_tool_rows -1
init_lr_frac 0.8
mmlu_epochs 3
personas_replay_epochs 1
personas_replay_plain_rows 30000
personas_replay_rows 10000
personas_replay_val_rows 256
pirate2x2_replay_epochs 1
pirate2x2_replay_rows 20000
pirate2x2_replay_val_rows 512
pirate_gsm_corpus gsm8k_pirate
pirate_gsm_epochs 1
pirate_gsm_rows 29892
pirate_gsm_val_rows 420
total_batch_size 1048576

Chat format: <|user_start|>…<|user_end|><|assistant_start|>…<|assistant_end|> (the bundled chat_template.jinja); trust_remote_code=True (nanochat GPT architecture). Evaluations of this model: https://claude.ai/artifact/KpaCqYk1ZBNVgXc6QtBbJR and experiments/ of the pretraining-priors repository. Exported with ppriors.hf_export.convert_sft; nanochat checkpoint d26_973m_seed1-tpp10-base-sft-mmlugsm (step 116).

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