An announcement for a new model appeared on Claude's official X account.Claude Opus 5.5. It is the first model in the new 5.5 family, and it is said to be "equivalent to Fable 5.1 for most tasks, at ...
Claude Opus 5.5 provide Fable 5.1-level performance on most work while Anthropic says typical workloads cost 40% less than ...
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