AI Chat Assistants · reliability comparison
Claude vs Gemini: which is more reliable? (2026)
Gemini is more reliable than Claude, scoring 88.0 vs 56.9 out of 100. Over the last 90 days Claude reported 39 incidents and Gemini reported 1, with effective uptime of 99.25% and 99.94% respectively. Claude resolves incidents faster on average (1h 24m).
Data updated Nov 1, 2026 · How we score
| Metric | Claude | Gemini |
|---|---|---|
| Reliability score | 56.9 | 88.0 |
| Rank (AI chat assistants) | #6 | #1 |
| Uptime (90 days) | 99.25% | 99.94% |
| Incidents (90 days) | 39 | 1 |
| Partial / major outages | 21 | 0 |
| Avg time to resolve | 1h 24m | 7h 22m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Claude and Gemini differ
- Claude reported 39× as many incidents as Gemini over the last 90 days (39 vs 1).
- Claude had 21 partial or major outages, compared with 0 for Gemini.
- Claude fixes problems faster: 1h 24m on average, against 7h 22m for Gemini (5.3× quicker).
- Claude's longest outage on record lasted 3h 24m (Aug 24, 2026); Gemini's lasted 3d (Feb 18, 2026).
90-day uptime
Claude
Gemini
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Claude incidents
- Degraded performanceOct 28, 2026 · resolved in 3h 46m
Elevated errors affecting the Google Calendar connector
Affected: claude.ai, Claude Code, Claude Cowork
- Degraded performanceOct 28, 2026 · resolved in 1h 49m
Elevated errors affecting the Gmail connector
Affected: claude.ai, Claude Code, Claude Cowork
- Partial outageOct 27, 2026 · resolved in 41m
Elevated errors for Claude Sonnet 5.5
Affected: claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork
- Partial outageOct 27, 2026 · resolved in 42m
Elevated errors for Claude Sonnet 5.5
Affected: claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork
- Partial outageOct 25, 2026 · resolved in 32m
Elevated errors for Claude Fable 5.1
Affected: claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork
- Partial outageOct 25, 2026 · resolved in 1h 39m
Elevated errors for Claude Sonnet 5.5 and other models
Affected: claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork
Recent Gemini incidents
- Degraded performanceSep 11, 2026 · resolved in 7h 22m
Mitigated intermittent elevated error rates with Gemini 3.1 Pro models on Gemini Web and Gemini App.
Affected: Gemini
Other AI chat assistants to consider
- Perplexity · #2 · 99.83% uptime
- Grok · #3 · 99.77% uptime
- DeepSeek Chat · #4 · 100% uptime
- Pi · #5 · 99.01% uptime