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The Messages API can retain a conversation briefly so later turns upload only new messages; applications still need their own transcript.

The $200 monthly plan keeps a weekly allowance, while verification determines whether a temporary session cap remains.

The new route combines Google Cloud access and billing with an API operated by Anthropic, creating a separate organization for each project.

The proactive assistant runs on its own cloud computer, but its background checks and tasks consume the same allowance as other Claude work.

Anthropic’s new background assistant shares your Claude allowance and still needs your judgment. The useful question is which work it can take off your mind.

Anthropic’s security research has a concrete outcome in a widely used server. For teams trying AI audits, the useful question is whether a proposed change closes an unnecessary path while preserving the work the software must do.

Agents can write programs that divide large tasks into phases and combine results, with spending and completion conditions developers need to handle.

Already-claimed offers remain active while Anthropic re-reviews applications; existing members keep other program benefits.

The lightweight model introduces adaptive thinking and lower starting rates, but requests with prompts beyond 100,000 tokens jump to a fivefold pricing bracket.

The nomination-only program pairs a four-day intensive with 12 weeks of deployment support, targeting 10,000 Frontier Deployed Engineers across enterprise partners by the end of 2027.

The extensions can change prompts, tool calls and on-screen controls. They also run with the user’s machine permissions, making trust in the plugin’s author a material part of installation.

The September 28 release retains Sonnet 5’s base token prices, adds deployment safeguards and changes a setting developers need when migrating workloads that previously disabled thinking.

The portal lets developers on paid Claude plans submit connectors or plugin bundles, track safety reviews and choose when approved listings go live. It will also report installs and listing discovery after publication.

Anthropic has released Claude Opus 5.5, the first model in its Claude 5.5 family, with lower listed token prices than Opus 5 and broad cloud availability. Biology and cybersecurity use remain subject to verification programs because Anthropic classifies the model as comparable to Claude Mythos 5.1 in those areas.

Anthropic is folding Claude Cowork into its primary chat experience and adding beta document and presentation tools, beginning with a staged rollout for Pro and Max subscribers.

Anthropic’s Fable 5.1 and Mythos 5.1 share the same underlying model but not the same rules of engagement. That split is more important than another week at the top of a benchmark chart.

Anthropic has introduced Claude Fable 5.1 for general use and Claude Mythos 5.1 for vetted research partners, pairing the identical underlying model with divergent safeguards while reducing prompt cache-read prices by 75%.