Claude from Anthropic Down: Disruptions and Ongoing Solutions

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Key Takeaways

1The Claude service from Anthropic experienced a major outage, affecting many users reported on Downdetector.

2Anthropic has partially resolved the issue, but errors persist on certain models like Opus 4.8.

3The suspension of Fable 5 by the U.S. government adds further complexity to the situation.

💡Why it matters — These interruptions highlight the fragility of AI services in the face of technical and regulatory constraints, impacting users and developers.

Claude by Anthropic Down: Ongoing Disruptions and Solutions

Issues Encountered by Claude Service from Anthropic

The AI service Claude, developed by Anthropic, experienced a significant outage this Tuesday, as reported by numerous users online. On the Downdetector platform, over 2,000 reports were logged at 1:27 PM Eastern Time, or 10:27 AM Pacific Time. This spike in reports quickly diminished after Anthropic implemented a temporary solution. Anthropic's status page confirmed the existence of the issue shortly before 1:30 PM ET, stating that the company was investigating errors affecting several of its models, as well as Claude's web interface, its API, Claude Code, and Claude Cowork. Subsequent updates revealed that the company was working to resolve these malfunctions and monitoring the results, although some models continued to experience issues.

Problem Resolution by Anthropic

After applying a solution, Anthropic announced that the main issue had been resolved. The affected models, including Sonnet and Opus, recorded an error rate of about 10% during the first half-hour of the outage. The Opus 4.8 model, in particular, maintained an average error rate of 10% for nearly an hour and twenty minutes after the other models were resolved.

Persistent Errors with Claude Opus 4.8

Anthropic released an additional update regarding the ongoing outage, indicating that errors persisted specifically for the Claude Opus 4.8 model. The company is actively working on a solution for this ongoing issue.

Ongoing Issues with Certain Models

In a third update, Anthropic clarified that errors continued to affect the Opus 4.8 and Haiku 4.5 models. No specific timeline for resolving these issues was provided, and no further updates were given.

Clarification on Fable 5

On Downdetector, some commentators joked that the outage might signal the return of Claude Fable 5. However, this is not the case. Fable 5, which is a consumer version of Anthropic's advanced Mythos 5 model, was launched the previous week. Anthropic suspended access to this model last Friday, following the imposition of export controls by the U.S. government, prohibiting its use by foreign nationals. The Trump administration claimed there was a way to bypass Fable's security measures, but Anthropic contested this assertion, arguing that the issue was not as severe as the government claimed.

Update on the Situation

Anthropic indicated that this outage could be short-lived. At 2:00 PM ET, the company announced that it had implemented a solution and was monitoring the results. Reports on Downdetector peaked at 2,103 at 1:26 PM, before quickly dropping to 518 at 1:41 PM.