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RockToken/qwen3_30b_a3b_to_4b_onpolicy_5k_src20k-25k_freeze_random

sourceHugging Faceapache-2.0updated 5mo agoView on Hugging Face

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Model Card

qwen330ba3bto4bonpolicy5ksrc20k-25kfreeze_random

A 4B math-distilled model. Student fine-tuned from RockToken/qwen3_30b_a3b_to_4b_offpolicy_20k via on-policy reverse-KL distillation against a Qwen3-30B-A3B teacher, using the token_freeze_kd algorithm to mask a 98-token "freeze list" out of the KD loss.

This is the control arm ("random" token set) of an A/B experiment on the effect of selectively freezing certain tokens during on-policy KD.

Training


Student (init)	`RockToken/qwen3_30b_a3b_to_4b_offpolicy_20k`
Teacher	`Qwen/Qwen3-30B-A3B-Instruct-2507`
Data	OpenThoughts3 math prompts — 5k slice (src indices 20k-25k of OpenThoughts3-1.2M)
Source file	`openthoughts_prompt_math_5k_src20k-25k.jsonl`
KD algorithm	`token_freeze_kd` (see KDFlow)
KD loss	reverse-KL, kdtemperature=1.0, kdratio=1.0
Freeze list	98 token IDs from `random.json` (control set)
Freeze weight	0.0 (loss on these tokens is fully zeroed)
Backend	FSDP2, bf16, gradient checkpointing
Topology	4× H100 (1 node), teacher TP=4, rollout TP=2
Optimizer	AdamW, lr=2e-6 (5% warmup, cosine→1e-8), max_norm=1.0
Batch	trainbatchsize=4, micro=1, nsamplesper_prompt=4
Steps	1 epoch, 2500 steps
Rollout	response cap 1024 tokens, temperature=1.0, top_p=1.0
Chat template	applied; `enable_thinking=False` (Instruct-2507 is non-thinking)

A/B siblings

—5k variants (this slice only):
—`RockToken/qwen3_30b_a3b_to_4b_onpolicy_5k_src20k-25k_freeze_random` — control
—`RockToken/qwen3_30b_a3b_to_4b_onpolicy_5k_src20k-25k_freeze_rock` — treatment
—10k variants (5k + continued 5k on src25k-30k):
—`RockToken/qwen3_30b_a3b_to_4b_onpolicy_10k_src20k-30k_freeze_random` — control
—`RockToken/qwen3_30b_a3b_to_4b_onpolicy_10k_src20k-30k_freeze_rock` — treatment

Use

python

from transformers import AutoModelForCausalLM, AutoTokenizer
tok = AutoTokenizer.from_pretrained("RockToken/qwen3_30b_a3b_to_4b_onpolicy_5k_src20k-25k_freeze_random")
model = AutoModelForCausalLM.from_pretrained("RockToken/qwen3_30b_a3b_to_4b_onpolicy_5k_src20k-25k_freeze_random", torch_dtype="bfloat16")