Marktechpost iconMarktechpostSep 22, 2026

Anthropic Releases Claude Opus 5.5: Fable 5.1-Level Performance at 40% Lower Running Cost Than Opus 5

Anthropic has released Claude Opus 5.5, the first model in its new Claude 5.5 family. It also costs 40% less to run than Opus 5 on typical workloads at default settings.

Anthropic Releases Claude Opus 5.5: Fable 5.1-Level Performance at 40% Lower Running Cost Than Opus 5

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Anthropic has released Claude Opus 5.5, the first model in its new Claude 5.5 family.

It also costs 40% less to run than Opus 5 on typical workloads at default settings.

On Anthropic's own benchmarks, it leads in agentic coding, […] The post Anthropic Releases Claude Opus 5.5:

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Anthropic has released Claude Opus 5.5, the first model in its new Claude 5.5 family. It also costs 40% less to run than Opus 5 on typical workloads at default settings. On Anthropic's own benchmarks, it leads in agentic coding, […] The post Anthropic Releases Claude Opus 5.5:

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  • The team states it performs at the level of Claude Fable 5.1 on most work.

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