Claude API and web services restored after 35-minute outage affecting Sonnet and Opus models
Anthropic's Claude services went offline on June 23 at 10:19 AM ET, affecting most models including Sonnet and Opus across all platforms except Claude for Government. The company deployed a fix by 10:53 AM ET, ending an outage that lasted approximately 35 minutes.
Claude API and web services restored after 35-minute outage affecting Sonnet and Opus models
Anthropic's Claude services experienced a major outage on June 23, 2026, taking down most of its model lineup for approximately 35 minutes. The company deployed a fix at 10:53 AM ET and is now monitoring system stability.
Outage timeline and affected services
The incident began at 10:19 AM ET, according to Anthropic's status page. The outage impacted:
- Claude.ai web interface
- Claude Console
- Claude Code
- Claude API
Claude for Government remained operational throughout the incident.
Models affected
While Anthropic's status update did not specify which models were affected, user reports indicate Claude Sonnet and Claude Opus — the company's most commonly used models — returned no responses during the outage. The timing follows recent changes to model availability, as Anthropic recently pulled Fable 5 from user access.
Claude Sonnet and Opus handle the majority of Claude API traffic, making this outage particularly disruptive for production applications and enterprise users.
Company response
Anthropic posted a "Monitoring" status at 10:53 AM ET (14:53 UTC), stating: "A fix has been implemented and we are monitoring the results." The company has not disclosed the root cause of the outage.
What this means
This 35-minute outage marks one of Anthropic's most significant service disruptions in the past 60 days. For enterprises relying on Claude API for production workloads, the incident underscores the importance of implementing fallback mechanisms and multi-provider strategies. The fact that Claude for Government remained online suggests Anthropic maintains separate infrastructure for its government cloud offering, which may provide higher reliability guarantees for sensitive deployments.
The lack of detail about the outage cause is notable — transparency around incident post-mortems has become standard practice among major AI providers, and users will likely expect more information as Anthropic's customer base grows.
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