🤖Claude AI Models Hit by Errors, Fix in the Works
Claude AI Models Down, Teams on the Case
TL;DR
Claude AI models including Mythos/Fable 5.1 and Opus 5 hit by errors on September 3, 2026. Teams are working on a fix, impacting claude.ai, Claude API, Claude Code, and Claude Cowork.
Claude AI models like Mythos/Fable 5.1 and Opus 5 experienced elevated errors on September 3, 2026, affecting multiple services. If you rely on these models for your projects or workflows, expect some downtime and potential delays. The issue was first reported at 13:41 UTC and the cause was identified by 13:50 UTC. The fix is being worked on, with updates posted on Atlassian Statuspage.
Key Points
Claude AI models including Mythos/Fable 5.1 and Opus 5 experienced elevated errors on September 3, 2026.
The incident affected claude.ai, Claude API, Claude Code, and Claude Cowork, impacting workflows and projects.
The issue was first reported at 13:41 UTC and investigated at 13:26 UTC.
The cause of the elevated errors was identified by 13:50 UTC, with a fix being worked on.
Updates on the status of the incident are being posted on Atlassian Statuspage.
Why It Matters
If you're using Claude AI models like Mythos/Fable 5.1 or Opus 5 in your projects, the recent errors could cause delays and disruptions. Teams are working on a fix, but keep an eye on the Statuspage for updates. This affects anyone relying on these models for their workflows.
Frequently Asked Questions
Why does this matter?
If you're using Claude AI models like Mythos/Fable 5.1 or Opus 5 in your projects, the recent errors could cause delays and disruptions. Teams are working on a fix, but keep an eye on the Statuspage for updates. This affects anyone relying on these models for their workflows.
What happened?
Claude AI models including Mythos/Fable 5.1 and Opus 5 hit by errors on September 3, 2026. Teams are working on a fix, impacting claude.ai, Claude API, Claude Code, and Claude Cowork.
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