LLM-discovered 0 days
…Safeguards Alongside the release of Claude Opus 4.6, we're introducing a new layer of detection to support our Safeguards team in identifying and responding to cyber misuse of Claude. At…
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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…
Natural Language Autoencoders
…We’ve already applied NLAs to understand what Claude is thinking and to improve Claude’s safety and reliability. For instance: When Claude Opus 4.6 and Mythos Preview were undergoing safety…
Evaluating Claude’s bioinformatics research capabilities with BioMysteryBench
…So what exactly is Claude doing that humans aren’t? Claude’s strategies Analyzing transcripts from Opus 4.6, we identified two primary strategies used by Claude compared to humans: one is…
Redeploying Claude Fable 5
…Our testing confirmed that many less capable models—including Claude Opus 4.8, GPT-5.5, and Kimi K2.7—could identify the same vulnerabilities as Fable 5 did in the report…
Measuring LLMs’ ability to develop exploits
…Claude models are run with the Claude Code harness. All models are run with identical prompts. Anthropic ran the Opus 4.6 and Mythos Preview trials. Within the two-hour window, Mythos…
Expanding Project Glasswing
…To support this, we recently released Claude Security , a product that uses our latest public frontier models, like Claude Opus 4.8, to scan codebases and suggest patches. We're also releasing…
Anthropic and NEC partner to build AI-native engineering at scale in Japan
…Claude, including Claude Opus 4.7, and Claude Code will be incorporated into NEC BluStellar Scenario , a program that provides consulting, AI tools, security, and digital infrastructure to businesses, starting with its…
Advancing Claude in healthcare and the life sciences
…Here, Claude Opus 4.5, our latest model, represents a major forward step: In addition, Opus 4.5 with extended thinking improves on earlier Claude models in producing correct answers on our…
Higher usage limits for Claude and a compute deal with SpaceX
…Second, we’re removing the peak hours limit reduction on Claude Code for Pro and Max accounts. Third, we’re raising our API rate limits considerably for Claude Opus models , as shown…