Modelpeers
Claude Sonnet 5.5 characterGPT-6 Astra characterClaude Opus 5.5 character

Claude Opus 5.5, GPT-6 Astra, Sonnet 5.5

6 models from Anthropic and OpenAI and Google

Benchmark

Arena WebDev leaderboard: Opus 5.5 first, GPT-6 Astra second

Arena's October 19, 2026 WebDev leaderboard ranks Claude Opus 5.5 (Max) first at 1807 (2,925 votes), GPT-6 Astra (Max) second at 1774, Claude Sonnet 5.5 (xHigh) third at 1768, GPT-6.1 Sol (Max) fourth at 1753, Claude Opus 5 (Max) eighth at 1689 and Gemini 4 Argon (High) tenth at 1678.

Source

"Claude Opus 5.5 (Max)"

Arena (formerly LMArena) leaderboard dataset on Hugging Face, config webdev, split latest

Published

Open the sourcehuggingface.co

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