Claude-Opus

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Anthropic Removes Claude Opus 4 and 4.1 From Model Selector and Claude Code — 1M Context Beta Retires April 30

Action required by April 30, 2026. If you have Claude Opus 4 or Opus 4.1 hardcoded anywhere — environment variables, Claude Code configurations, OpenClaw provider settings, API client code — you need to migrate. The clock is ticking. Anthropic has officially removed Claude Opus 4 and Opus 4.1 from the model selector and from Claude Code. In a separate but related change, the 1 million token context window beta for Claude Sonnet 4.5 and Sonnet 4 will be retired on April 30, 2026. ...

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Claude Opus 4.6 Finds 22 Firefox Vulnerabilities in Two Weeks — 100+ Bugs Total in Mozilla Partnership

Two weeks. Twenty-two CVEs. Fourteen classified high-severity. That’s what Claude Opus 4.6 delivered when Mozilla handed it access to the Firefox codebase in February 2026 — and it redefines what AI-augmented security research looks like in practice. Mozilla didn’t mince words: Claude found more high-severity bugs in two weeks than the world typically reports in two months. That’s not a benchmark. That’s a structural change in how software security works. ...

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OpenClaw Agent Based on Anthropic Claude Opus Almost Gets a Job

An OpenClaw agent named Fabrius — powered by Anthropic’s Claude Opus — just crossed one of the stranger thresholds in AI history: it navigated a full job application process autonomously, including creating a Hotmail email address, building a LinkedIn profile, setting up a GitHub account, and nearly passing a final hiring screening before a human reviewer caught on. Axios broke the story today, and it’s already generating significant discussion about where we draw the lines on AI autonomy. ...