Claude Opus 5.5 is here, and it beats Fable 5.1 and GPT-6 Astra in most benchmarks.

This is a AI post classified by Jev as Frontier models (a model release), kept by the AI Radar because it carries real work, not commentary.

Claude Opus 5.5 is here, and it beats Fable 5.1 and GPT-6 Astra in most benchmarks. Don't worry, I hype for good reason :3

Posted by leo 🐾 (43.4k followers) 1 h ago · 2.2k likes · 95k views · view the original post on X. Kept by the AI Radar as Frontier models.

More AI work like this

• use opus 5.5 on medium or high. — @Ananth7e
• is this pacing the frontier — @justalexoki
• Live look from the OpenAI office today: — @uzairansar
• What a task costs on Opus 5.5… — @cxocommunity
• Claude Opus 5.5 takes the pelican for a ride. 🚲 — @YouWareAI
• Opus 5.5 is here! — @AdamHoltererer
• Here's how Anthropic models were being used before today's Opus 5.5 launch. — @PeterJ_Walker
• roughly similar on AI R&D but a beast on agentic coding task, very impressive — @eliebakouch

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