{"id":"INC-anthropic-zhk4v3yv1lsf","kind":"incident","aliases":[],"related":[],"title":"Anthropic: Degraded performance for Claude Opus 5, Claude Sonnet 5","description":"This incident has been resolved.","summary":null,"severity":"medium","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":"2026-08-17T13:56:41+00:00","first_seen_at":"2026-10-23T19:12:22+00:00","triaged_at":"2026-10-23T21:52:55+00:00","updated_at":"2026-10-23T21:52:55+00:00","category":"vendor","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'5':7A,10A 'ai':16B 'anthrop':1A,17B 'anthropic':13A,15A 'claud':5A,8A 'degrad':2A 'inc':12A 'inc-anthropic-zhk4v3yv1lsf':11A 'incid':18B,23C 'llm':19B 'op':20B 'opus':6A 'perform':3A 'resolv':26C 'sonnet':9A 'vendor':21B 'zhk4v3yv1lsf':14A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-08-17T13:56:41+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"statuspage","external_id":"anthropic:zhk4v3yv1lsf","url":"https://stspg.io/dw9p8s0wg6hh","severity":"medium","published_at":"2026-08-17T13:56:41+00:00","modified_at":"2026-08-17T15:29:25+00:00","first_seen_at":"2026-10-23T19:12:22+00:00","fetched_at":"2026-10-26T08:20:05+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"}