Introducing Claude Opus 5.5, the first model in our new Claude 5.5 family.
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.
Introducing Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.
Posted by Claude (1.8M followers) 1 h ago · 31.8k likes · 1.9M 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
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- Opus 5.5 is here! — @AdamHoltererer
- Here's how Anthropic models were being used before today's Opus 5.5 launch. — @PeterJ_Walker
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