{"id":"INC-anthropic-461yvfrzpwtt","kind":"incident","aliases":[],"related":[],"title":"Anthropic: Elevated errors for multiple models","description":"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.","summary":null,"severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Anthropic","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["ai","anthropic","incident","llm","ops","vendor"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"resolved","published_at":"2026-09-03T13:26:04+00:00","first_seen_at":"2026-10-23T19:12:22+00:00","triaged_at":"2026-10-23T21:50:49+00:00","updated_at":"2026-10-23T21:50:49+00:00","category":"vendor","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'16':40C,42C,43C '461yvfrzpwtt':10A '5':30C '5.1':23C,26C '9':39C 'affect':20C 'ai':12B 'anthrop':1A,13B 'anthropic':9A,11A 'claud':21C,24C,28C 'elev':2A 'end':36C 'error':3A 'fabl':25C 'impact':34C 'inc':8A 'inc-anthropic-461yvfrzpwtt':7A 'incid':14B 'issu':19C 'llm':15B 'model':6A 'multipl':5A 'mytho':22C 'op':16B 'opus':29C 'pt':41C 'resolv':33C 'utc':44C 'vendor':17B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-09-03T13:26:04+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"statuspage","external_id":"anthropic:461yvfrzpwtt","url":"https://stspg.io/9xz4hhmd1jzn","severity":"high","published_at":"2026-09-03T13:26:04+00:00","modified_at":"2026-09-03T16:23:12+00:00","first_seen_at":"2026-10-23T19:12:22+00:00","fetched_at":"2026-10-26T00:55:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}