Qwen3-4B

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First seenSep 17, 2026
Last mentionedSep 17, 2026

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Don't Mask the Environment: Observation Supervision Changes How Agents Explore Under RL

ActObs supervises observation tokens during SFT, improving GRPO-trained agent pass@k on Terminal-Bench 2.0 and cross-domain code editing for Qwen3 models.

arXiv cs.AI / cs.LG / cs.CLSep 17, 17:11 UTC · Sep 17, 2026AI research1 · 1 read

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Qwen3-4Bai model · 1
Qwen3-8Bproduct · 1
Terminal-Bench 2.0product · 1
Qwenvendor · 1
Qwen3-8Bai model · 1

Entities are extracted by the model from each article. First seen Sep 17, 2026, last mentioned Sep 17, 2026. Watching keeps it in this browser only (no account); the watchlist page and dashboard alerts use it.