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RewindexOutage eventsAug 13, 2026

Anthropic outage, Aug 13, 2026

4 linked vendors posted 5 incidents between and . 4 vendors named Anthropic in 4 incidents (4 of them blamed it). Anthropic posted “Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5” at 14:33 UTC. 1 other vendor had incidents in the same window; nothing links them to Anthropic (listed below).

Observed, not verified. A line means a vendor’s incident named another vendor, or a known dependency (declared by the vendor and named as a cause before). It is not a proven cause. Incidents that only share the time window are listed apart.

Times are in UTC; lags are from when Anthropic posted ().

    23. Anthropic posted
Named AnthropicNamed another vendor or depends on oneEach column is 30 minutes

How it spread

Vendors that named Anthropic, grouped by when they posted, and vendors that blamed one of the vendors Anthropic took down. Solid lines: the vendor named the other. Dashed: a known dependency, not named in the incident.

Swipe sideways to see the whole diagram.

Anthropicposted 14:33 UTCWithin an hour4 vendors, 4 blamed AnthropicBolt.new, GitHub, GitHub Copilot, xAILater1 vendor, 1 blamed AnthropicBolt.new
Anthropicposted 14:33 UTCWithin an hour4 vendors, 4 blamed AnthropicBolt.new, GitHub, GitHubCopilot, xAILater1 vendor, 1 blamed AnthropicBolt.new
Rendered on the server with pele from the Mermaid source below. Each box lists the first few vendors; every vendor is listed further down.
Mermaid source
flowchart LR
  root["Anthropic<br/>posted 14:33 UTC"]:::root
  h1["Within an hour<br/>4 vendors, 4 blamed Anthropic<br/>Bolt.new, GitHub, GitHub Copilot, xAI"]:::blames
  root --> h1
  later["Later<br/>1 vendor, 1 blamed Anthropic<br/>Bolt.new"]:::blames
  root --> later

Vendors that named Anthropic

In their own words. “Blames” means a causal phrase sits next to the name (“due to”, “upstream provider”…).

Within an hour

3 vendors

  • +6 min

    Blames Anthropic

    Incident, no impact listed

    Bolt.new[Dependency Check] Anthropic

    …[Dependency Check] Anthropic This incident has been resolved. This incident has been resolved. Upstream Provider has reported an outage…

  • +10 min

    Blames Anthropic

    Minor incident

    GitHuband GitHub CopilotErrors with the Fable 5 Model in Copilot

    …n approximately 14:06 and 15:47 UTC, the Copilot service experienced a degradation of the Claude Fable 5 model due to an issue with our upstream provider. Users encountered elevated error rates, peaki…

  • +12 min

    Blames Anthropic

    Minor incident

    xAIInvestigating service degradation — Automations, Cloud Agents, and IDE

    …xpected, but due to a service outage for one of our model providers, agent surfaces using Anthropic Models Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5 may run into issues. This incident has b…

Later

1 vendor

  • +10 h 11 min

    Blames Anthropic

    Incident, no impact listed

    Bolt.new[Dependency Check] Anthropic

    …[Dependency Check] Anthropic This incident has been resolved. This incident has been resolved. Upstream Provider has reported an outage…

Also happening at the same time (not linked)

1 incident from 1 vendor started in this window without naming Anthropic or a linked vendor, and with no known dependency on them. Listed for context only; they are not counted as part of the event (an ordinary week has about 48 incidents in these hours).

Show all 1

Detected automatically from 7 status pages opening incidents in the peak hour (normally at most 8). Mentions are matched by name in each incident’s title and updates, then classified as cause, location or integration; quoted text is the vendor’s. Vendors that share one status page are shown once.