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Anthropic vs OpenAI

Side-by-side uptime and incident comparison.

Anthropic

30-day uptime
93.766%
42 incidents
90-day uptime
97.173%
avg 149m · longest 2912m
Recent incidents
MCP apps unavailable on Claude.ai 2026-04-23 Elevated errors for uploading files 2026-04-20 Claude Sonnet 4.5 error spike 2026-04-20 Elevated errors on Opus 4.6 2026-04-19 Errors uploading documents to Google Drive in Claude.ai 2026-04-17

OpenAI

30-day uptime
97.973%
25 incidents
90-day uptime
99.146%
avg 228m · longest 2161m
Recent incidents
Enterprise, business & education workspaces seeing elevated rate of conversation errors 2026-04-22 ChatGPT free users are seeing errors when having conversations 2026-04-22 Some users may encounter issues with GPT-5.4-C model in Codex 2026-04-21 Some users will see higher error rates on Codex 2026-04-20 Elevated errors for ChatGPT conversations in Europe 2026-04-20

Incident Timeline Comparison

Date Anthropic OpenAI
2026-04-23 MCP apps unavailable on Claude.ai —
2026-04-20 Elevated errors for uploading files —
2026-04-20 Claude Sonnet 4.5 error spike —
2026-04-19 Elevated errors on Opus 4.6 —
2026-04-17 Errors uploading documents to Google Drive in Claude.ai —
2026-04-16 Failures to add Credentials to Vaults —
2026-04-16 Claude Cowork not starting for some users —
2026-04-16 Opus 4.6 elevated rate of errors —
2026-04-15 Elevated errors on Claude.ai, API, Claude Code —
2026-04-14 Degraded service on usage and analytics admin API endpoints —
2026-04-13 Claude.ai down —
2026-04-11 Email login down —
2026-04-10 Elevated errors on requests to Claude models —
2026-04-10 Some Claude.ai share links were inaccessible —
2026-04-10 Degraded Performance on Vaults —
2026-04-09 Elevated Connector Error Rates —
2026-04-09 Sonnet 4.6 elevated rate of errors —
2026-04-08 Errors when connecting to Claude.ai —
2026-04-08 Outage affecting Workspace Creation —
2026-04-08 Elevated errors on Claude.ai, API, Claude Code —
2026-04-08 Sonnet 4.6 elevated rate of errors —
2026-04-07 Elevated errors on Claude.ai —
2026-04-06 Sonnet 4.6 elevated rate of errors —
2026-04-06 Elevated errors on Claude.ai —
2026-04-04 Sonnet 4.6 and Opus 4.6 elevated error rate —
2026-04-03 Elevated errors on requests to Claude Sonnet 4.6 —
2026-04-01 Errors on the Claude.ai desktop application —
2026-04-01 Elevated errors on requests to Claude Opus 4.6 —
2026-04-01 Elevated timeouts on requests to Claude Opus 4.6 and Sonnet 4.6 —
2026-04-01 Elevated errors and latency on Claude Haiku 4.5 —
2026-03-31 Unavailable connectors in Claude.ai desktop applications —
2026-03-31 Opus 4.6 and Sonnet 4.6 error rate elevated —
2026-03-31 Elevated errors on Claude Opus 4.6 —
2026-03-29 Dispatch sessions not responding in Claude Desktop —
2026-03-28 Elevated errors on Opus 4.6 Fast Mode —
2026-03-27 Elevated error rates on Opus 4.6 —
2026-03-26 Elevated errors for MCP calls —
2026-03-26 Elevated errors on Claude Opus 4.6 and Sonnet 4.6 —
2026-03-25 Elevated errors on Claude Opus 4.6 —
2026-03-25 Elevated connection reset errors in Cowork —
2026-03-25 Elevated Errors on claude.ai —
2026-03-25 Elevated errors on Claude Opus 4.6 —
2026-03-23 Elevated errors on Claude.ai [retroactive] —
2026-03-22 Claude.ai and Claude login down —
2026-03-22 Delayed response completion on Claude.ai —
2026-03-21 Elevated error rates on Claude Opus and Sonnet 4.6 —
2026-03-19 Elevated errors on Claude Opus 4.6 —
2026-03-19 Elevated errors on Claude Sonnet 4.6 —
2026-03-19 Elevated errors across surfaces —
2026-03-18 Elevated errors on Claude.ai —
2026-03-18 Increased errors on Opus 4.6 —
2026-03-18 Elevated errors on Claude Opus 4.6 —
2026-03-17 Elevated errors on Claude Opus 4.6 —
2026-03-17 Elevated errors on Claude Sonnet 4.6 —
2026-03-17 Elevated errors on Claude Opus 4.6 —
2026-03-17 Elevated errors on Claude Sonnet 4.6 —
2026-03-16 Elevated errors on Claude Sonnet 4.6 —
2026-03-16 Elevated errors on Claude.ai —
2026-03-16 Elevated errors on Claude.ai —
2026-03-13 Elevated errors on Claude Opus 4.6 and Sonnet 4.6 —
2026-04-22 — Enterprise, business & education workspaces seeing elevated rate of conversation errors
2026-04-22 — ChatGPT free users are seeing errors when having conversations
2026-04-21 — Some users may encounter issues with GPT-5.4-C model in Codex
2026-04-20 — Some users will see higher error rates on Codex
2026-04-20 — Elevated errors for ChatGPT conversations in Europe
2026-04-20 — Users unable to load ChatGPT, Codex and API Platform
2026-04-20 — Users may encounter issue with ChatGPT Business after upgrade or adding new seats for up to an hour
2026-04-16 — Responses API Streaming Error
2026-04-15 — ChatGPT FedRAMP workspaces not loading
2026-04-14 — Account Creation Issues
2026-04-12 — Elevated 401 errors for API endpoints
2026-04-11 — Some users may experience issues accessing ChatGPT
2026-04-10 — Issue with API platform login and account creation
2026-04-10 — Issues with share link creation on web UI
2026-04-08 — Elevated Errors with Login
2026-04-07 — Some users may experience issues accessing the ChatGPT website on VPN
2026-04-06 — GET /v1/responses endpoint is currently down and unable to serve requests
2026-04-06 — Some users may experience empty response from ChatGPT in web
2026-04-02 — ChatGPT Dictation Elevated Error Rate
2026-04-02 — High error rate for completionsapi-gpt-5-nano
2026-03-31 — Elevated failures for some users joining ChatGPT Enterprise and ChatGPT Edu workspaces via SSO.
2026-03-29 — Account creation and login are unstable across all surfaces
2026-03-26 — Responses API and Sora Increased Error Rates
2026-03-25 — Unable to download or preview project files
2026-03-24 — Elevated error rates on Realtime API SIP endpoints
2026-03-24 — Increased errors creating new sync apps and sync delays with existing apps
2026-03-24 — Some customer may encounter errors creating, updating projects, and uploading files
2026-03-20 — Pinned chats are not loading on web browsers for ChatGPT
2026-03-18 — Sora video generation failing
2026-03-17 — High Error rates with ChatGPT 5.4 Pro
2026-03-17 — Excel Plugin is inaccessible for some users
2026-03-17 — Elevated errors for sign-in and account creation
2026-03-17 — Elevated Errors Affecting ChatGPT Free and Guest Plan Users
2026-03-13 — Responses API errors when using background mode
2026-03-13 — Conversation Errors for Logged out Users