An update on recent Claude Code quality reports
…A few weeks before we released Opus 4.7, we started tuning Claude Code in preparation. Each model behaves slightly differently, and we spend time before each release optimizing the harness and…
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What’s next?
Users will find Opus 4.8 to be a modest but tangible improvement on its predecessor. There’s still more to be done: we’re working on developing and releasing models that provide many of the same capabilities as Opus at a lower cost. Not only that, but we plan to release a new class of model with even higher intelligence than Opus. As part of Project Glasswing, a small number of organizations are currently using Claude Mythos Preview for cybersecurity work. Models of this capability level require stronger cyber safeguards before they can be generally released. We’re making swift progress on dev
Introducing Claude Opus 4.8Building AI for cyber defenders
…This work allowed Claude Sonnet 4.5 to match or eclipse Opus 4.1, our frontier model released only two months prior, in discovering code vulnerabilities and other cyber skills. Adopting and…
Introducing Claude Opus 4.5
…First impressions As our Anthropic colleagues tested the model before release, we heard remarkably consistent feedback. Testers noted that Claude Opus 4.5 handles ambiguity and reasons about tradeoffs without hand-holding…
Statement on the US government directive to suspend access to Fable 5 and Mythos 5
…If this standard was applied across the industry, we believe it would essentially halt all new model deployments for all frontier model providers. As we have stated publicly , we believe the government…
Evaluating Claude’s bioinformatics research capabilities with BioMysteryBench
…problems designed to evaluate a capability of a model—have now become a source of competition across AI developers, reported in model release system cards and tracked on many online leaderboards . Competition…
Anthropic forms $200 million partnership with the Gates Foundation
…We will support this work by making agriculture-specific improvements to Claude, datasets of local crops, and benchmarks to evaluate how our models perform in agricultural applications, before releasing these tools as…
Emotion concepts and their function in a large language model
…Note that this experiment was conducted on an earlier, unreleased snapshot of Claude Sonnet 4.5; the released model rarely engages in this behavior (see our system card for more information). First…
Teaching Claude why
Alignment Teaching Claude why May 8, 2026 Last year, we released a case study on agentic misalignment . In experimental scenarios, we showed that AI models from many different developers sometimes took egregiously…
An update on our election safeguards
…This is built into the model through character training (where we reward the model for producing responses that reflect a set of values and traits), and then reinforced through our system prompts…
Agents for financial services
Announcements Agents for financial services May 5, 2026 We’re releasing ten ready-to-run agent templates for the most time-consuming work in financial services: building pitchbooks, screening KYC files, and…