Claude Down: Anthropic Confirms Widespread Outage Affecting Multiple AI Models
2 Sources
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Anthropic confirms Claude is down, multiple models affected
Claude is experiencing an outage, with users encountering elevated errors when sending requests to multiple Anthropic AI models. The incident began on September 3, 2026, at around 9:41 AM ET, and is affecting several Claude models, including the company's latest Mythos, Fable, and Opus models. According to Anthropic's status page, the company initially said it was investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5. At around 9:41 AM ET, Anthropic said it had identified the cause of the elevated errors and was working on a fix. A few minutes later, Anthropic published a more complete list of affected models, confirming that the outage impacts Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, and Opus 4.6. For users, the outage can result in requests failing to complete or returning errors when using one of the affected Claude models. Anthropic said at 10:49 AM ET that it was continuing to work on a fix for the issue. The company has not publicly disclosed what caused the elevated errors beyond confirming that it has identified the underlying issue. The outage remains ongoing at the time of writing.
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Is Claude down for you? Here's what's going on
The company says it has identified the issue and is working on a fix. Having some trouble with Claude today? You're far from the only one, as a growing number of users are also reporting issues. Here's what's going on with Anthropic's AI services. Over on Anthropic's status page, the company confirms that multiple Claude models are experiencing elevated rates of error. All of the affected models include Mythos 5.1, Fable 5.1, Mythos 5, Fable 5, Opus 5, Opus 4.8, and Opus 4.6. Fortunately, Anthropic says that it has identified the cause of the errors and it is working on a fix. It sounds like a resolution may not be far off, so we'll keep an eye on the situation. When all services are back online, this article will be updated.
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Anthropic's Claude AI models experienced a widespread outage on September 3, 2026, affecting multiple versions including Mythos 5.1, Fable 5.1, and Opus 5. The company confirmed elevated error rates across seven models and identified the root issue, though services remain disrupted as engineers work on implementing a fix.
Anthropic Confirms Claude AI Models Experiencing Widespread Outage
Anthropicโ€™s Claude AI platform experienced a significant disruption on September 3, 2026, leaving users unable to complete requests across multiple models. The outage began at approximately 9:41 AM ET, affecting some of the companyโ€™s most advanced AI models including Mythos 5.1, Fable 5.1, and Opus 5
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. According to Anthropicโ€™s status page, the company initially reported investigating elevated error rates before confirming it had identified the cause and was working on a fix2
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Source: Android Authority
Multiple Models Affected by Elevated Error Rates
The scope of the outage expanded as Anthropic published a comprehensive list of affected models. Claude down issues now impact seven distinct versions: Mythos 5.1, Fable 5.1, Mythos 5, Fable 5, Opus 5, Opus 4.8, and Opus 4.6
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. Users attempting to send requests to these Anthropicโ€™s Claude AI models encountered failures or error messages, disrupting workflows for businesses and individuals relying on the platform. The elevated error rates prevented normal operations, with user requests either failing to complete or returning errors across the affected versions2
.Company Identifies Root Issue, Works Toward Resolution
By 10:49 AM ET, Anthropic updated its status page confirming engineers continued working on implementing a fix for the identified root issue
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. However, the company has not publicly disclosed specific technical details about what caused the disruption beyond acknowledging the underlying problem. The outage remained ongoing at the time of initial reporting, though Anthropic indicated a resolution may not be far off2
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Source: BleepingComputer
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Implications for Enterprise Users and AI Reliability
This widespread outage raises questions about service reliability for organizations integrating Claude into critical workflows. As businesses increasingly depend on AI models for customer service, content generation, and data analysis, even brief disruptions can cascade into significant productivity losses. The incident affects both legacy versions like Opus 4.6 and Anthropicโ€™s latest releases, suggesting a systemic issue rather than model-specific problems. Users should monitor the status page for real-time updates as engineers work to restore full functionality across all affected AI models. The speed of Anthropicโ€™s response in identifying the cause will likely factor into how enterprises evaluate the platformโ€™s dependability moving forward, particularly as competition intensifies in the enterprise AI space.
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