Duration: 1 day, 17 hours and 8 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 27, 15:50:17 GMT+0
Resolved - The issue affecting claude.ai, the Claude API, Claude Code, and Claude Cowork has been resolved. Impact occurred from 07:42 PT / 14:42 UTC to 08:17 PT / 15:17 UTC..

Oct 27, 15:09:09 GMT+0
Identified - We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible..

Duration: 3 days, 5 hours and 50 minutes

Affected Components: OpenAI → APIs → Chat Completions

Oct 27, 16:20:06 GMT+0
Resolved - All affected services are operating normally again. We’re sorry for the disruption, and we appreciate your patience..

Oct 27, 15:40:14 GMT+0
Monitoring - We’ve applied a mitigation and are monitoring the affected services to confirm recovery..

Oct 27, 15:02:15 GMT+0
Investigating - We’re investigating a potential issue for the listed services and checking how it affects users. We’ll share an update when we know more..

Duration: 1 day, 18 hours and 11 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 27, 09:56:46 GMT+0
Resolved - The issue affecting Claude services has been resolved..

Oct 27, 09:38:11 GMT+0
Monitoring - A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery..

Oct 27, 09:14:35 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible..

Duration: 1 day, 8 hours and 21 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 25, 08:49:29 GMT+0
Resolved - The issue affecting Claude services has been resolved. Impact occurred from 01:08 PT / 08:08 UTC to 01:29 PT / 08:29 UTC..

Oct 25, 08:30:47 GMT+0
Monitoring - A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery..

Oct 25, 08:17:18 GMT+0
Identified - We have identified the cause of elevated errors on requests to Claude Fable 5.1 and are working on a fix. We will provide an update as soon as possible..

Oct 25, 08:17:08 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible..

Duration: 4 days, 3 hours and 20 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 25, 07:53:39 GMT+0
Resolved - The issue affecting Claude services has been resolved. Impact occurred from 23:05 PT on October 24 / 06:05 UTC on October 25 to 23:35 PT on October 24 / 06:35 UTC on October 25..

Oct 25, 06:35:59 GMT+0
Monitoring - A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery..

Oct 25, 06:27:52 GMT+0
Identified - We have identified the cause of elevated errors on requests to Claude Sonnet 5.5 and are working on a fix. We will provide an update as soon as possible..

Oct 25, 06:14:18 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. We will provide an update as soon as possible..

Duration: 1 day, 12 hours and 40 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 24, 05:53:30 GMT+0
Resolved - The issue affecting Claude services has been resolved. Impact occurred from 22:00 PT on October 23 / 05:00 UTC on October 24 to 22:35 PT on October 23 / 05:35 UTC on October 24..

Oct 24, 05:41:17 GMT+0
Monitoring - A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery..

Oct 24, 05:40:06 GMT+0
Identified - We have identified the cause of elevated errors on requests to other Claude models and are working on a fix. We will provide an update as soon as possible..

Oct 24, 05:24:53 GMT+0
Identified - We have identified the cause of elevated errors on requests to other Claude models and are working on a fix. We will provide an update as soon as possible..

Oct 24, 05:16:50 GMT+0
Investigating - We are investigating elevated errors on requests to other Claude models. We will provide an update as soon as possible..

Duration: 5 hours and 40 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 24, 00:37:17 GMT+0
Resolved - The issue affecting Claude Opus 5.5 has been resolved. Impact occurred from 17:23 PT on October 23 / 00:23 UTC on October 24 to 17:34 PT on October 23 / 00:34 UTC on October 24..

Oct 24, 00:31:37 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Opus 5.5. We will provide an update as soon as possible..

Duration: 1 day, 9 hours and 38 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 24, 00:11:20 GMT+0
Resolved - The issue affecting Claude models has been resolved. Impact occurred from 16:28 PT / 23:28 UTC on October 23 to 16:59 PT / 23:59 UTC on October 23..

Oct 23, 23:54:14 GMT+0
Monitoring - We are seeing success rates return to normal for all affected models, and are continuing to monitor to ensure no further issues..

Oct 23, 23:39:22 GMT+0
Identified - We have identified the cause of elevated errors on requests to Claude Fable 5.1, Sonnet 5.5, and Haiku 5.5, as well as fast mode requests to Opus 5.5 and are working on a fix. We will provide an update as soon as possible..

Oct 23, 23:37:42 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible..

Duration: 1 day, 16 hours and 11 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 21, 20:29:17 GMT+0
Resolved - The issue affecting other Claude models has been resolved..

Oct 21, 19:49:06 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Fable 5. We will provide an update as soon as possible..

Duration: 2 days, 21 hours and 22 minutes

Affected Components: OpenAI → APIs → Chat Completions

Oct 21, 16:44:09 GMT+0
Resolved - All impacted services have now fully recovered..

Oct 21, 15:47:26 GMT+0
Monitoring - We have applied the mitigation and are monitoring the recovery..

Oct 21, 15:34:47 GMT+0
Identified - We have identified that users are experiencing elevated errors for the impacted services. We are working on implementing a mitigation..

Duration: 2 days, 13 hours and 31 minutes

Affected Components: OpenAI → APIs → Chat Completions

Oct 21, 03:28:00 GMT+0
Resolved - All impacted services have now fully recovered..

Oct 21, 02:48:00 GMT+0
Monitoring - We have applied the mitigation and are monitoring the recovery..

Oct 21, 02:26:28 GMT+0
Investigating - We are investigating the issue for the listed services..

Duration: 18 hours and 30 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 6, 12:43:02 GMT+0
Resolved - The issue affecting Claude Opus 5.5 has been resolved..

Oct 6, 12:37:38 GMT+0
Identified - We have identified the cause of elevated errors on requests to Claude Opus 5.5 and are working on a fix. We will provide an update as soon as possible..

Oct 6, 12:24:33 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Opus 5.5. We will provide an update as soon as possible..

Duration: 15 hours and 53 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 5, 13:21:37 GMT+0
Resolved - The issue affecting Claude Mythos 5.1 and Claude Fable 5.1 has been resolved. Impact occurred from 05:40 PT / 12:40 UTC to 06:10 PT / 13:10 UTC..

Oct 5, 13:05:44 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1. We will provide an update as soon as possible..

Duration: 15 days, 15 hours and 41 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Oct 1, 22:36:22 GMT+0
Resolved - This issue has been resolved..

Oct 1, 18:23:02 GMT+0
Monitoring - We have resolved the issue causing delays in credits being applied after purchase. We are monitoring closely to ensure no further issues..

Oct 1, 16:20:40 GMT+0
Investigating - We are investigating delays in credit purchases being reflected in account balances, resulting in some requests failing for insufficient credit balance. We will provide an additional update as soon as possible..

Duration: 8 days and 18 hours

Affected Components: OpenAI → APIs → Chat Completions

Sep 30, 20:35:46 GMT+0
Resolved - All impacted services have now fully recovered..

Sep 30, 18:21:53 GMT+0
Monitoring - We have applied the mitigation and are monitoring the recovery..

Sep 30, 17:51:40 GMT+0
Identified - We have implemented an initial mitigation and are seeing improvements in API latency. We are continuing to investigate the scope of the issue and apply additional mitigations as needed. Some requests to the Responses and Chat Completions APIs may still experience elevated latency or timeouts..

Sep 30, 17:13:13 GMT+0
Identified - We have identified that users are experiencing elevated latency for the impacted services. We are working on implementing a mitigation..

Sep 30, 17:05:46 GMT+0
Identified - We have identified that users are experiencing elevated latency for the impacted services. We are working on implementing a mitigation..

Duration: 13 days, 9 hours and 9 minutes

Affected Components: OpenAI → APIs → Chat Completions

Oct 6, 08:26:10 GMT+0
Resolved - All impacted services have now fully recovered..

Sep 29, 23:14:02 GMT+0
Resolved - The issue causing elevated errors across ChatGPT, Codex, and the API has been resolved, and all affected services have recovered. Thank you for your patience while we worked to restore service. The detailed Root Cause Analysis (RCA) will be published in the next 5 business days..

Sep 29, 22:47:10 GMT+0
Monitoring - We have applied the mitigation and are monitoring the recovery..

Sep 29, 22:03:22 GMT+0
Monitoring - We have applied the mitigation and are monitoring the recovery..

Sep 29, 21:09:11 GMT+0
Monitoring - We have applied the mitigation and are monitoring the recovery..

Sep 29, 19:39:36 GMT+0
Monitoring - We have applied the mitigation and are monitoring the recovery..

Sep 29, 19:08:39 GMT+0
Investigating - We’re still investigating elevated errors affecting ChatGPT, Codex, and the API including the Agents API. Some users may experience failed requests, difficulty logging in or signing up, and tasks that do not complete. We’ll share updates as we learn more..

Sep 29, 18:24:17 GMT+0
Investigating - We’re investigating elevated errors affecting ChatGPT, Codex, and the API including the Agents API. Some users may experience failed requests, difficulty logging in or signing up, and tasks that do not complete. We’ll share updates as we learn more..

Sep 29, 17:52:52 GMT+0
Investigating - We’re investigating elevated errors affecting ChatGPT, Codex, and the API. Some users may experience failed requests, difficulty logging in or signing up, and tasks that do not complete. We’ll share updates as we learn more..

Duration: 5 days, 5 hours and 44 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Sep 29, 16:27:21 GMT+0
Resolved - The issue affecting Claude.ai, the Claude desktop and mobile apps, Claude Code, Claude Cowork, and the Claude API has been resolved, and services have been operating normally since recovery. Impact occurred from 07:00 PT / 14:00 UTC to 07:59 PT / 14:59 UTC..

Sep 29, 15:30:44 GMT+0
Monitoring - All services have been operating normally since 14:59 UTC. We are continuing to monitor..

Sep 29, 15:11:27 GMT+0
Monitoring - Most services have recovered as of 14:59 UTC. Signing in, starting new chats, voice conversations, Claude Code and Cowork sessions, purchases and file uploads are working again. Some messages sent between 14:00 and 14:59 UTC may not have been saved. We are monitoring closely and will post another update within 30 minutes..

Sep 29, 15:00:14 GMT+0
Investigating - The errors that began at 14:00 UTC were mitigated at 14:36 UTC, and existing conversations are mostly working again. A second issue is preventing many users from signing in (single sign-on and Sign in with Apple are unavailable), starting new chats, voice conversations and Claude Code or Cowork sessions, making purchases, and uploading files. If you're signed in, please don't sign out. We're working on a fix and will post another update within 30 minutes..

Sep 29, 14:41:08 GMT+0
Investigating - We have applied a mitigation and error rates have dropped substantially. Some sign-in attempts, account actions and Claude Code and Cowork sessions are still failing. We are continuing to work on a full fix..

Sep 29, 14:30:19 GMT+0
Investigating - We are investigating reports of degraded performance affecting claude.ai, platform.claude.com, the Claude API, Claude Code, and Claude Cowork. We will provide an update as soon as possible..

Sep 29, 14:28:49 GMT+0
Investigating - We are investigating elevated error rates affecting Claude.ai (including the desktop and mobile apps), Claude Code and Claude Cowork. Some requests to the Claude API are also returning errors. We will provide an update as soon as possible..

Sep 29, 14:21:37 GMT+0
Investigating - We are investigating elevated error rates affecting Claude.ai (including the desktop and mobile apps), Claude Code and Claude Cowork. Users may see failed requests, errors loading or sending conversations, or be asked to sign in again; retrying may succeed. We will provide an update as soon as possible..

Duration: 4 days, 1 hour and 57 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Sep 22, 02:35:23 GMT+0
Resolved - This issue has been resolved. Impact occurred from 5:50pm PT / 00:50 UTC to 7:10pm PT / 02:10 UTC..

Sep 22, 02:11:43 GMT+0
Monitoring - We have seen success rates return to normal across affected models, and are monitoring closely to ensure no further issues..

Sep 22, 01:35:46 GMT+0
Identified - We are continuing to work to resolve errors affecting some models. At this time, requests to Claude Fable 5 and 5.1 and Mythos 5 and 5.1 have returned to normal success rates. We are working to resolve remaining errors affecting Claude Opus 5, and will provide an additional update shortly..

Sep 22, 01:17:32 GMT+0
Identified - We have identified the cause of elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and are working on a fix. We will provide an update as soon as possible..

Sep 22, 00:57:26 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5. We will provide an update as soon as possible..

Duration: 21 hours

Affected Components: OpenAI → APIs → Chat Completions

Sep 17, 21:50:36 GMT+0
Resolved - All impacted services have now fully recovered..

Sep 17, 21:20:00 GMT+0
Monitoring - We have applied the mitigation and are monitoring the recovery..

Sep 17, 20:20:00 GMT+0
Identified - We have identified that users are experiencing elevated errors for the impacted services. We are working on implementing a mitigation..

Duration: 3 days, 14 hours and 21 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Sep 15, 11:14:44 GMT+0
Resolved - A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring to ensure it has resolved the issue..

Sep 15, 10:50:26 GMT+0
Monitoring - A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring to ensure it has resolved the issue..

Sep 15, 09:52:34 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1. We will provide an update as soon as possible..

Sep 15, 09:48:23 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1. We will provide an update as soon as possible..

Duration: 17 hours and 19 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Sep 11, 14:37:11 GMT+0
Resolved - The issue affecting Claude services has been resolved. Impact occurred from 13:57 to 14:20 UTC.

Sep 11, 14:28:27 GMT+0
Monitoring - A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery..

Sep 11, 14:28:04 GMT+0
Monitoring - A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring for recovery..

Sep 11, 14:21:01 GMT+0
Identified - We have identified the cause of elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1 and are working on a fix. We will provide an update as soon as possible..

Sep 11, 14:19:51 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Fable 5.1 and Claude Mythos 5.1. We will provide an update as soon as possible..

Duration: 5 days, 13 hours and 28 minutes

Affected Components: OpenAI → APIs → Chat Completions

Sep 11, 11:21:43 GMT+0
Resolved - All impacted services have now fully recovered..

Sep 11, 10:09:47 GMT+0
Monitoring - We have brought additional capacity online and are seeing improvements for some GPT-5.6 Sol API traffic. We continue to mitigate elevated errors affecting Chat Completions and Responses and are monitoring recovery.

Sep 11, 09:08:15 GMT+0
Identified - We have identified that users are experiencing elevated errors for the impacted services. We are working on implementing a mitigation..

Duration: 4 days, 4 hours and 42 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Sep 10, 23:24:22 GMT+0
Resolved - The issue affecting Claude services has been mitigated..

Sep 10, 21:43:40 GMT+0
Identified - We are experiencing slower than normal response times on the Claude API for some customers whose traffic enters through the US Midwest. Users may experience elevated latency and some request timeouts..

Duration: 7 days, 9 hours and 7 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Sep 3, 16:23:12 GMT+0
Resolved - 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..

Sep 3, 16:06:42 GMT+0
Monitoring - A fix has been deployed for Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and we are monitoring for recovery..

Sep 3, 15:25:20 GMT+0
Identified - The only affected models right now are Opus 4.8 and Opus 5. The rest of the models have recovered to baseline error rate..

Sep 3, 14:49:48 GMT+0
Identified - We are continuing to work on a fix for this issue..

Sep 3, 13:50:26 GMT+0
Identified - An exhaustive list of affected models: Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, Opus 4.6..

Sep 3, 13:41:19 GMT+0
Identified - We have identified the cause of elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and are working on a fix. We will provide an update as soon as possible..

Sep 3, 13:26:04 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5. We will provide an update as soon as possible..

Duration: 18 hours and 54 minutes

Affected Components: Anthropic → Claude API (api.anthropic.com)

Sep 3, 12:56:26 GMT+0
Resolved - This incident has been resolved..

Sep 3, 12:47:15 GMT+0
Monitoring - A fix has been implemented and we are monitoring the results..

Sep 3, 12:37:31 GMT+0
Investigating - We are investigating elevated errors on requests to Claude Sonnet 5. We will provide an update as soon as possible..