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.

Anthropic launched Claude Opus 5.5, the first model in its Claude 5.5 family, matching Claude Fable 5.1 on most tasks while costing 40% less to run.
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 | Tuesday, September 22, 2026 at 16:31 UTC |
| Format | Video |
| Account | @claudeai, 2M followers today |
| Views per follower | 14.81 (directory median 9.07) |
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