Anthropic launches Claude Opus 5.5 for development from specs to testing

The New Stack is relaying Anthropic’s claims; the source inventory has no primary source.

Anthropic has launched Claude Opus 5.5, a model for the full development cycle from creating specifications through debugging, code generation, and testing.

The New Stack reports that Anthropic says Claude Opus 5.5 costs about 40% less to run than Opus 5.

Claim check:

• Anthropic has launched Claude Opus 5.5 for the full development cycle from creating specifications through debugging, code generation, and testing. (confirmed only by the carrying publication: evidence; «The company introduced Claude Opus 5.5 on Tuesday to span more of the software application development lifecycle: from design specification creation through debugging to code generation and testing.»)
• The New Stack reports that Anthropic says Claude Opus 5.5 costs about 40% less to run than Opus 5. (confirmed only by the carrying publication: evidence; «Anthropic says that Claude Opus 5.5 performs at the level of Claude Fable 5.1 on “most work” tasks and costs around 40% less to run than Opus 5.»)

Publications:

• https://thenewstack.io/claude-opus-5-5-lifecycle

score 62.1 out of 100 · kind: release