{"id":"INC-anthropic-0q89dylg9vjk","kind":"incident","aliases":[],"related":[],"title":"Anthropic: Elevated errors for Claude Sonnet 5.5","description":"We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.","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":"2026-10-27T09:14:35+00:00","first_seen_at":"2026-10-27T09:15:54+00:00","triaged_at":"2026-10-27T09:15:57+00:00","updated_at":"2026-10-27T09:58:41+00:00","category":"vendor","confidence":null,"triage":null,"analyst_status":null,"analyst_note":null,"search":"'0q89dylg9vjk':11A '5.5':7A,29C 'ai':13B 'anthrop':1A,14B 'anthropic':10A,12A 'claud':5A,27C 'elev':2A,22C 'error':3A,23C 'inc':9A 'inc-anthropic-0q89dylg9vjk':8A 'incid':15B 'investig':21C 'llm':16B 'op':17B 'possibl':38C 'provid':32C 'request':25C 'sonnet':6A,28C 'soon':36C 'updat':34C 'vendor':18B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T09:14:35+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"statuspage","external_id":"anthropic:0q89dylg9vjk","url":"https://stspg.io/rql9h590npxd","severity":"high","published_at":"2026-10-27T09:14:35+00:00","modified_at":"2026-10-27T09:56:46+00:00","first_seen_at":"2026-10-27T09:15:54+00:00","fetched_at":"2026-10-27T11:00:22+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"}