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Meet Harness-1: A 20B Retrieval Subagent Trained With Reinforcement Learning Inside a Stateful Search Harness on gpt-oss-20b
Harness-1 is a 20B search agent reaching 0.730 average curated recall across eight benchmarks, behind only Opus-4.6.
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marktechpost.com
Meet Harness-1: A 20B Retrieval Subagent Trained With Reinforcement Learning Inside a Stateful Search Harness on gpt-oss-20b
Harness-1 is a 20B search agent reaching 0.730 average curated recall across eight benchmarks, behind only Opus-4.6.
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venturebeat.com
Researchers trained an open source AI search agent, Harness-1, that outperforms GPT-5.4 on recalling relevant information
Harness-1 suggests that the future of agentic AI lies in building better environments for models to work within, rather than just training larger models on more data.