Anthropic is currently investigating a significant outage affecting its flagship Claude Opus 5 model, which has caused elevated error rates across multiple services, including Claude.ai, the Claude API, Claude Code, and Claude Cowork. The incident began on July 27 at 08:16 UTC (1:46 PM IST), and users in India, one of Claude’s largest markets, may experience failed requests, delayed responses, or interrupted sessions.
Anthropic has classified the event as degraded performance rather than a complete outage, meaning some requests are working while others fail. The company confirmed the investigation on its status page, stating, “We are currently investigating this issue.” Notably, Claude Console and Claude for Government remain operational.
The disruption primarily affects products powered by Claude Opus 5, Anthropic’s advanced model designed for coding, research, and professional workloads. Chat users may receive incomplete responses, developers may encounter server errors, and coding tasks within Claude Code may stop unexpectedly.
Anthropic has not identified a single root cause, but its documentation lists possible failures such as timeouts, overloads, and internal server errors. Official SDKs automatically retry temporary errors, and request IDs can help engineers trace failed API calls during investigations.
This outage follows another Claude Opus 5 disruption resolved less than a day earlier. Anthropic has not confirmed whether both incidents share the same technical cause, though recent status history shows multiple reliability issues with Claude services.
For users handling urgent tasks, experts recommend temporarily switching to another Claude model, saving work locally, and retrying requests once service conditions improve.