mh-v1b-math-9b-paonly

Part of the Meta-Harness v1b study — co-evolution GRPO (verl) where a shared-weight policy plays two roles: TA (grader / solver, single-turn) and Proposer (harness/scaffold editor via multi-turn SEARCH/REPLACE). Question: does co-evolving the policy and its evaluation harness help, and through which lever (policy vs scaffold)?

Domain Math
Architecture Qwen3_5ForCausalLM — 32 layers, hidden 4096
Precision bf16 (merged from FSDP via verl.model_merger)
Notes Ablation cell: PA-only (harness evolution axis only).

Collection: https://huggingface.co/collections/hyunseoki/meta-harness-v1b-policy-x-harness-co-evolution-6a5c9877f74920e8922808bc

Usage

from transformers import AutoModelForCausalLM, AutoTokenizer
tok = AutoTokenizer.from_pretrained("hyunseoki/mh-v1b-math-9b-paonly")
model = AutoModelForCausalLM.from_pretrained("hyunseoki/mh-v1b-math-9b-paonly", torch_dtype="bfloat16")
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Model size
9B params
Tensor type
BF16
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Collection including hyunseoki/mh-v1b-math-9b-paonly