All services / Reliability / November 2026
AI reliability leaderboard: November 2026
Live: month to date (2 days so far), updated hourly. Results freeze on the 1st. Ranked by uptime from our own checks, then fewest outages, then least downtime. Methodology · JSON
Most reliable
- Anthropic API · 100%
- Character.AI · 100%
- ChatGPT · 100%
- Claude · 100%
- Cursor · 100%
- DeepSeek · 100%
- ElevenLabs · 100%
- GitHub Copilot · 100%
- Google Gemini · 100%
- Hugging Face · 100%
Most outage-prone
No ranked service had a public outage or uptime under 99.5% in November 2026.
Full ranking (16)
| # | Service | Uptime | Outages | Total downtime | Median outage | User reports |
|---|---|---|---|---|---|---|
| 1 | Anthropic API | 100% | 0 | — | — | 0 |
| 2 | Character.AI | 100% | 0 | — | — | 0 |
| 3 | ChatGPT | 100% | 0 | — | — | 0 |
| 4 | Claude | 100% | 0 | — | — | 0 |
| 5 | Cursor | 100% | 0 | — | — | 0 |
| 6 | DeepSeek | 100% | 0 | — | — | 0 |
| 7 | ElevenLabs | 100% | 0 | — | — | 0 |
| 8 | GitHub Copilot | 100% | 0 | — | — | 0 |
| 9 | Google Gemini | 100% | 0 | — | — | 0 |
| 10 | Hugging Face | 100% | 0 | — | — | 0 |
| 11 | Microsoft Copilot | 100% | 0 | — | — | 0 |
| 12 | Midjourney | 100% | 0 | — | — | 0 |
| 13 | Mistral AI | 100% | 0 | — | — | 0 |
| 14 | OpenAI API | 100% | 0 | — | — | 0 |
| 15 | Perplexity | 100% | 0 | — | — | 0 |
| 16 | Spacex | 100% | 0 | — | — | 0 |
Methodology
- Uptime: share of the covered time a service was up. Downtime is the time covered by our own failed HTTP checks (each failed check counts for one check interval; checks run from Cloudflare's network) merged with confirmed outages (below), even ones our checks missed. Overlapping periods are counted once. It measures reachability, not every feature.
- Outages: public outages in our outage log (outage level or worse for at least 10 minutes, or a major outage), excluding ones flagged as false positives. Outages are confirmed by the vendor's status page and/or user reports. Downtime is clipped to the period.
- User reports: problem reports submitted on this site during the period.
- Minimum data: a service is ranked only with checks on at least 60% of the days in the period (2 of 2) and at least 24 checks (about 12 a day). Services ranked with fewer than 50 checks a day are marked lower confidence (*); short outages between their checks are more likely to be missed. 730 services were left out for too little data.
- Order: uptime (high to low), then fewer outages, less downtime, fewer reports. Month pages freeze on the 1st (UTC); the current month is live.