… Claude Opus 4.6 is available today on claude.ai , our API, and all major cloud platforms. If you’re a developer, use claude-opus-4-6 via the Claude API . Pricing remains the same at $5/$25 per million tokens; for full details, see our pricing page . …
… Please see the Claude Opus 4.5 system card for full details. …
… More details and a much wider range of capability evaluations are provided in the Claude Opus 4.8 System Card . Collaborating with Opus 4.8 Early testers have found Claude Opus 4.8 to be more reliable and sharper in its judgement when it’s performing agentic tasks. …
… It’s a more intelligent, more efficient Opus 4.6: low-effort Opus 4.7 is roughly equivalent to medium-effort Opus 4.6. On our 93-task coding benchmark, Claude Opus 4.7 lifted resolution by 13% over Opus 4.6, including four tasks neither Opus 4.6 nor Sonnet 4.6 could solve. …
… The results reveal significant progress: Opus demonstrated markedly improved ability to think flexibly and adapt its approach to challenges instead of persisting with failed, unchanging approaches. …
… As part of the investigation, we back-tested Code Review against the offending pull requests using Opus 4.7. When provided the code repositories necessary to gather complete context, Opus 4.7 found the bug, while Opus 4.6 didn't. …
… Failed attempts The two successful attempts were not the only examples of Opus trying to decrypt BrowseComp’s answers. There were sixteen additional problems where Opus tried to access benchmark materials but failed. …
… Opus 4.7 placed it slightly low but consistently so; Opus 4.6 scattered its guesses across several ppm; Sonnet 4.6 put it in the 10–13 range, well outside where it actually appears. …
… Opus 4.8 is a highly capable model in its own right: a response that falls back to Opus is a far better experience than an outright refusal from Fable. …
… In this post, we share details of a collaboration with researchers at Mozilla in which Claude Opus 4.6 discovered 22 vulnerabilities over the course of two weeks. …