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LiveUpdated 2026-09-22 18:12 UTC

🚨HOLY MOLY. Anthropic just released Claude Opus 5.5.

🚨HOLY MOLY. Anthropic just released Claude Opus 5.5. >66.4% Terminal-Bench 4.0 vs GPT-6 Astra’s 57.9% >54.4%…🚨HOLY MOLY. Anthropic just released Claude Opus 5.5. >66.4% Terminal-Bench 4.0 vs GPT-6 Astra’s 57.9% >54.4%…

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.

🚨HOLY MOLY. Anthropic just released Claude Opus 5.5. >66.4% Terminal-Bench 4.0 vs GPT-6 Astra’s 57.9% >54.4% FrontierCode >81.8% OSWorld >30%+ faster output >$4/M input + $20/M output Opus 5.5 is so capable at cybersecurity that MOST cyber tasks will be transparently rerouted to the older Opus 4.8. Even Anthropic’s benchmark runs used fallback models when safeguards triggered: cyber → Opus 4.8, biology/frontier-AI work → Opus 5. It beats Opus 5 and Fable 5.1. Sonnet 5.5 + Haiku 5.5 are coming in the next few weeks.

Posted by Choblin (2.9k followers) 1 h ago · 5 likes · 696 views · view the original post on X. Kept by the AI Radar as Frontier models.

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Every post is read and classified by Jev (TypeSafe): what it is, which market it belongs to, and whether the link is a real tool. 42.6k posts from 5k X accounts over the last 14 days, 1.8k tools, 19 markets. Collected every 5 minutes, fully re-ranked every hour — last update 2026-09-22 18:12 UTC. Full method.