data-agent-4b-normal-best (v0)

A 4B data-science agent finetuned from Qwen/Qwen3.5-4B with GRPO (online RL) to solve data-analysis tasks in a sandboxed bash environment. This repo holds the best-eval checkpoint (peak pass@4, step 200) of the 4b-normal run.

Training

  • Method: GRPO (Group Relative Policy Optimization) via TRL.
  • Environment: Harbor task spec + E2B cloud sandboxes; single bash tool, answer submitted to /workdir/answer.txt.
  • Dataset: AdithyaSK/data_agent_rl_environment_train.
  • Schedule: 1 epoch (1119 steps), 8 generations/prompt, KL-anchored to the reference. Tasks were presented in random order (standard).
  • This checkpoint: step 200 (best-eval).

Evaluation

Agentic pass@k on the held-out data_agent_rl_environment_eval suite (366 tasks, 4 samples/task, unbiased estimator):

metric base (Qwen3.5-4B) this model Δ
pass@1 0.600 0.660 +0.060
pass@2 0.677 0.745 +0.068
pass@3 0.715 0.779 +0.064
pass@4 0.740 0.802 +0.062

Usage

from transformers import AutoModelForCausalLM, AutoTokenizer
m = AutoModelForCausalLM.from_pretrained("AdithyaSK/data-agent-4b-normal-best", revision="v0", torch_dtype="bfloat16")
tok = AutoTokenizer.from_pretrained("AdithyaSK/data-agent-4b-normal-best", revision="v0")

Part of the data-agent v0 release. Served non-thinking with a single bash tool (Qwen tool-calling).

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