Claude Opus 5.5 is here — near-frontier intelligence at 40% lower cost. ⚡️
Anthropic’s new flagship delivers Claude Fable 5.1-level performance on most tasks, while costing 40% less to run than Opus 5. It’s built for long-running coding and knowledge work, with major gains in codebase migrations, debugging, and multi-step agent tasks. Anthropic says it’s also over 30% faster, writes more naturally, and is less likely to take risky actions outside its instructions. Sonnet 5.5 and Haiku 5.5 are coming soon.
More capable agents, fewer tokens, lower cost.
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1September 24, 2026 2.8K 2
