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Qwen3.8-27B RL Post-Training Model Released
On October 20, 2026, an open-source environment model post-trained with reinforcement learning based on Qwen3.8-27B was released. According to Rohan Paul, the model reduced the hallucination rate on AA-Omniscience from 30.4% to 15.1%, and surpassed Muse Glimmer 30B and GPT-6 Luna high on Terminal-Bench, τ3-bench, ClawEval, and BFCL v4; however, on DeepSWE, Luna still leads with 53.1%. Its median output for solved tasks is 23.8K tokens, compared with 54.9K for the base Qwen. The authors also mention that the MLA version replaces 16 layers of full attention with multi-head latent attention, reducing memory usage per token from 64 KiB to 18 KiB; the compressed version can run on a single 24 GB RTX 4090, with a context about 3.5 times that of the base Qwen.
On October 20, 2026, an open-source environment model post-trained with reinforcement learning based on Qwen3.8-27B was released. According to Rohan Paul, the model reduced the hallucination rate on AA-Omniscience from 30.4% to 15.1%, and surpassed Muse Glimmer 30B and GPT-6 Luna high on Terminal-Bench, τ3-bench, ClawEval, and BFCL v4; however, on DeepSWE, Luna still leads with 53.1%. Its median output for solved tasks is 23.8K tokens, compared with 54.9K for the base Qwen. The authors also ment
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Qwen3.8-27B RL post-training model released
On October 20, 2026, an open-source environment model post-trained with reinforcement learning based on Qwen3.8-27B was released. According to Rohan Paul, the model reduced the hallucination rate on AA-Omniscience from 30.4% to 15.1%, and surpassed Muse Glimmer 30B and GPT-6 Luna high on Terminal-Bench, τ3-bench, ClawEval, and BFCL v4; however, on DeepSWE, Luna still leads with 53.1%. Its median output for solved tasks is 23.8K tokens, compared with 54.9K for the base Qwen. The authors also mention that the MLA version replaces 16 layers of full attention with multi-head latent attention, reducing memory usage per token from 64 KiB to 18 KiB; the compressed version can run on a single 24 GB RTX 4090, with a context about 3.5 times that of the base Qwen.
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