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Open-weight Qwen3.8 27B outperforms Claude Opus 5 on benchmarks

An open-weight model, Qwen3.8 27B, has demonstrated superior performance compared to the proprietary Claude Opus 5. Qwen3.8 27B achieved a score of 52, while Claude Opus 5 scored 63.1, indicating an 11.1-point gap. Additionally, Qwen3.8 27B is noted to be eight times more cost-effective per million output tokens. AI

IMPACT Highlights the growing competitiveness of open-weight models against proprietary systems in terms of performance and cost-efficiency.

RANK_REASON Comparison of benchmark scores between an open-weight and a proprietary LLM. [lever_c_demoted from research: ic=1 ai=1.0]

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Open-weight Qwen3.8 27B outperforms Claude Opus 5 on benchmarks

COVERAGE [1]

  1. Mastodon — mastodon.social TIER_1 English(EN) · opensourceaitech ·

    ⚖️ Open vs proprietary, today Open-weight: Qwen3.8 27B - 52 Proprietary: Claude Opus 5 - 63.1 Gap: 11.1 points · and 8x cheaper per 1M output tokens https:// ol

    ⚖️ Open vs proprietary, today Open-weight: Qwen3.8 27B - 52 Proprietary: Claude Opus 5 - 63.1 Gap: 11.1 points · and 8x cheaper per 1M output tokens https:// olud.ai/leaderboard.html # OpenSource # AI # LLM