GoKawiilAnthropic's Claude suffers outage across Mythos, Fable and Opus models
Anthropic confirmed an outage affecting multiple Claude models starting around 9:41 AM ET on September 3, 2026. Users of Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, and Opus 4.6 experienced elevated errors and failed requests. Anthropic identified the cause and said it was working on a fix, with the issue still unresolved as of 10:49 AM ET.
GoKawiil's interpretation of the reporting above, not reported fact.
As businesses increasingly build products and workflows on top of Claude's API, an outage spanning this many model versions can disrupt a wide swath of downstream applications simultaneously. It also underscores the reliability risks of depending on a single AI provider for critical infrastructure.
- Outage began around 9:41 AM ET on September 3, 2026, hitting multiple Claude models.
- Affected models include Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, and Opus 4.6.
- Anthropic identified the cause but had not resolved the issue as of the last update.
Source: bleepingcomputer.com, 2026-09-03
Published there as: “Anthropic confirms Claude is down, multiple models affected”
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