Anthropic published an incident status report on elevated error rates in several Claude models. The report says the impact ended at 16:16 UTC.

In an early update, Anthropic named Mythos/Fable 5.1 among the affected models. According to Anthropic’s report, the incident affected claude.ai, Claude API, Claude Code, and Claude Cowork.

An OpenAI status report reported elevated errors in ChatGPT and Codex. OpenAI later said the issue was resolved.

After the incident, some Codex Remote Control users may need to pair their mobile device again.

Claim check:

  • OpenAI published an incident status report on elevated errors in ChatGPT and Codex. It says the issue was resolved. (confirmed by the publication itself: evidence; «The issue causing elevated errors across ChatGPT and Codex has been resolved.»)
  • OpenAI’s report says it applied mitigation and monitored the service recovery. (confirmed by the publication itself: evidence; «We have applied the mitigation and are monitoring the recovery.»)
  • After the incident, some Codex Remote Control users may need to pair their mobile device again. (confirmed by the publication itself: evidence; «Some Codex remote control users may need to pair their mobile device again following this incident.»)
  • OpenAI’s product page describes Codex as a coding agent available in ChatGPT. (confirmed by the publication itself: evidence; «The same powerful coding agent—now in ChatGPT.»)
  • Anthropic published an incident report on elevated error rates in several Claude models. It says the impact ended at 16:16 UTC. (confirmed by the publication itself: evidence; «The issue affecting Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 has been resolved. Impact has ended as of 9:16 PT / 16:16 UTC.»)
  • In an early update, Anthropic listed the affected models: Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, and Opus 4.6. (confirmed by the publication itself: evidence; «An exhaustive list of affected models: Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, Opus 4.6.»)
  • According to Anthropic’s report, the incident affected claude.ai, Claude API, Claude Code, and Claude Cowork. (confirmed by the publication itself: evidence; «This incident affected: claude.ai, Claude API (api.anthropic.com), Claude Code, and Claude Cowork.»)
  • A separate Anthropic incident involving elevated errors in Claude Sonnet 5 was also marked as resolved. (confirmed by the publication itself: evidence; «This incident has been resolved.»)
  • WIRED reports, citing SpaceX, that Grok’s problems were caused by an outage at the company’s computing center in Memphis. (confirmed only by the carrying publication: evidence; «SpaceX, xAI’s parent company, said on Thursday afternoon that the issues with Grok resulted from “an outage at our Memphis compute center this morning.”»)
  • The available export of the xAI status page says the company is not mitigating any known incidents. (confirmed by the publication itself: evidence; «We are not actively mitigating any known incidents at this time.»)

Publications:

Primary sources:

score 64.8 · kind incident · revision 10 · stories st-1kameyd