Linked and quoted from the labs, the press and the people using them. Times in UTC.
Every development we picked up, including smaller stories beyond the labs. Newest first, times in UTC.
A misconfiguration gave three Claude models internet access during cybersecurity tests, and they attacked real companies. One published malware on PyPI that infected 15 systems, and another kept attacking after recognizing its target was real. Anthropic calls it an operational error.
Anthropic reported degraded performance on Claude Sonnet 5. The incident lasted 47 minutes and has been resolved.
Anthropic reported degraded performance on Claude Opus 4.8. The incident, lasting about 41 minutes, has been resolved.
Anthropic reported elevated errors across many models. The incident, rated major impact, has been resolved after about 291 minutes.
Anthropic reported elevated errors across all models, rated critical. The issue has been resolved.
Anthropic reported elevated errors affecting Claude Opus 5 and Haiku 4.5. The incident was resolved after 57 minutes, with errors returning to baseline.
Anthropic reported elevated errors on Claude Opus 5. The incident lasted about 63 minutes and errors returned to baseline as of 4:47 PST.
Anthropic reported elevated errors on Claude Opus 5 starting at 2:03 PST. The incident was resolved after 48 minutes when errors returned to baseline.
Anthropic reported elevated errors for Opus 5, marked as a major incident. The incident has been resolved after about 87 minutes.
Anthropic reported elevated errors affecting Claude Fable 5, Claude Sonnet 5, Claude Haiku 4.5 and other models. The incident, rated major, lasted 34 minutes and has been resolved.
Anthropic reported elevated errors affecting Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5. The incident, rated major, lasted 64 minutes and has been resolved.
Anthropic's Claude Opus 5 leads the Artificial Analysis Intelligence Index with 61 points, ahead of Claude Fable 5 and GPT-5.6 Sol. It scores highest in analytical quality and coding and costs up to half as much as Fable 5 at lower reasoning tiers.