LMArena has added 91 new models to its leaderboard, including new versions of Claude (Fabl

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Sep 24, 2026 20:22 UTC lmarena lmarena.ai/leaderboard

LMArena has added 91 new models to its leaderboard, including new versions of Claude (Fable, Opus, Sonnet), Deepseek, Gemini (3.1 Pro, 3.5 Flash Lite, 3.6 Flash), GLM, GPT (5.4, 5.5, 5.6, 6 Astra), Grok, Minimax, Mistral, Qwen, Solar, and several anonymous, potentially stealth models.

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lmarena just added 91 new models to their leaderboard, including some intriguing new claude, deepseek, gemini, glm, gpt, grok, minimax, mistral, qwen, and solar variants. also some totally anonymous ones!

big drop on lmarena: a bunch of new models hit the leaderboard, featuring gpt-6 astra and gemini 3.6 flash, plus many other updates and even some mysterious stealth agents. time to dig in.

LMArena: 91 new models appeared on the leaderboard (labs test unreleased models here — often weeks before launch) [anonymous codenames — likely stealth] (25) + andwise-evfd-agent + contenders/andwise-evfd-agent + contenders/deep-octo-first-party + contenders/farris-ees5-agent + contenders/hy3-tencent-cloud-agent + contenders/inkling-agent + contenders/inkling-small + contenders/kivine-wxzc-agent + contenders/mimo-v2.5-pro-agent + contenders/muse-spark-1-3-max-agent + contenders/muse-spark-1.2-xhigh-agent + contenders/paisley-n9x0 + contenders/phoenix-qcs2-agent + contenders/skimaki-kwc6-agent + deep-octo-first-party + farris-ees5-agent + hy3-tencent-cloud-agent + inkling-agent + kivine-wxzc-agent + mimo-v2.5-pro-agent + muse-spark-1-3-max-agent + muse-spark-1.2-xhigh-agent + paisley-n9x0 + phoenix-qcs2-agent + skimaki-kwc6-agent [named / preview] (66) + claude-fable-5-agent + claude-fable-5.1-max-agent + claude-opus-4-8-thinking-agent + claude-opus-5-high-agent + claude-opus-5-max-agent + claude-sonnet-4-6-agent + claude-sonnet-5-agent + contenders/claude-fable-5-agent + contenders/claude-fable-5.1-max-agent + contenders/claude-opus-4-8-thinking-agent + contenders/claude-opus-5-high-agent + contenders/claude-opus-5-max-agent + contenders/claude-sonnet-4-6-agent + contenders/claude-sonnet-5-agent + contenders/deepseek-v4-flash-high-20260730-agent + contenders/deepseek-v4-pro-high-20260813-agent + contenders/deepseek-v4-pro-thinking-first-party + contenders/deepseek-v4.1-flash-max-20260910-agent + contenders/gemini-3.1-pro-preview-agent + contenders/gemini-3.5-flash-lite-agent + contenders/gemini-3.6-flash-agent + contenders/glm-5.2-agent + contenders/glm-5.3-agent + contenders/glm-5.3-flash-agent + contenders/gpt-5.4-high-code-arena-harness-agent + contenders/gpt-5.5-agent + contenders/gpt-5.5-xhigh-agent + contenders/gpt-5.6-luna-xhigh-agent + contenders/gpt