> ## Documentation Index
> Fetch the complete documentation index at: https://docs.apiyi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Claude Models Back to Normal: Provider-Side Incident Ended at 00:16 on 4 Sep (UTC+8)

> Anthropic's official status page has marked the incident resolved: the issue affecting Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 ended at 00:16 on 4 September (UTC+8), which is 16:16 UTC on 3 September. All claude-* models on APIYI are serving normally again, and the earlier unavailability notice is now withdrawn.

**2026/9/4 00:43 (UTC+8)** · Model Status · Anthropic

✅ **Claude models are back to normal, and the earlier unavailability notice is withdrawn**

Cause: Anthropic's official status page (`status.claude.com`) posted Resolved at 16:23 UTC on 3 September: the issue affecting `claude-mythos-5-1`, `claude-fable-5-1`, and `claude-opus-5` has been resolved, with impact ending at 16:16 UTC, i.e. 00:16 on 4 September (UTC+8). This was a provider-side incident; the APIYI gateway was not changed, and all `claude-*` models are serving normally again with no code or parameter changes needed.

Grok model status is being tracked separately and will be updated once confirmed. Thank you for your patience; we are monitoring continuously.

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