Anthropic in the present day launched Claude Opus 5.5, the primary launch in a brand new household of Claude 5.5 fashions. Claude Opus 5.5 performs on the degree of Claude Fable 5.1 on most work, and prices round 40% much less to run than Opus 5. Over the approaching weeks, we’ll even be launching Claude Sonnet 5.5 and Haiku 5.5.
That is the primary mannequin launch for the reason that firm known as for pacing the frontier, which implies retaining security practices forward of mannequin capabilities.
What this implies for our mannequin improvement and launch
The present era of fashions depends on intensive alignment testing, pre-release analysis by exterior organizations similar to METR and Frontier Design, and safeguards matched to every mannequin’s capabilities in high-risk areas like cybersecurity and biology.
For Opus 5.5 particularly,
Anthropic ran alignments checks that present Opus 5.5 is the strongest performing mannequin so far. Noteworthy are enhancements to cybersecurity behaviors similar to biased reasonbing and making an attempt to flee a sandbox, amongst others. It’s also the primary Opus mannequin with comparable cybersecurity and biology safeguards as Fable 5.1. In line with Anthropic’s announcement, “When the safeguards intervene, requests fall again to a different mannequin transparently. For cyber, customers will have the ability to determine and repair bugs of their code, however most cybersecurity duties might be re-routed to Opus 4.8. Requests flagged by biology classifiers might be re-routed to Opus 5.”
As for pricing, Opus 5.5 requires much less compute to serve than Opus 5, the corporate introduced, and can price 40% lower than Opus 5 on typical workloads. Enter and output tokens are $4 and $20 per million, 20% lower than Opus 5., Anthropic mentioned.
Mario Rodriguez, chief product officer at GitHub, mentioned “Builders need brokers that may tackle actual software program work and end it. In our testing throughout GitHub Copilot CLI and VS Code, Claude Opus 5.5 used among the many fewest tokens and steps we measured. In VS Code, it solved extra terminal duties than Opus 5 in lower than half the steps. Greater than making particular person duties extra environment friendly, it’s making builders’ greater tasks extra achievable.”
Claude Opus 5.5 is now obtainable on all platforms, together with Amazon Internet Companies, Google Cloud, and Microsoft Azure. On the Claude Platform, builders can get began with Claude Opus 5.5.
To study extra, learn Anthropic’s weblog announcement.
