LLM API Providers · reliability comparison
Cohere vs OpenAI API: which is more reliable? (2026)
Cohere is more reliable than OpenAI API, scoring 91.6 vs 49.0 out of 100. Over the last 90 days Cohere reported 2 incidents and OpenAI API reported 35, with effective uptime of 99.94% and 98.73% respectively. Cohere resolves incidents faster on average (2h 40m).
Data updated Nov 1, 2026 · How we score
| Metric | Cohere | OpenAI API |
|---|---|---|
| Reliability score | 91.6 | 49.0 |
| Rank (LLM API providers) | #2 | #9 |
| Uptime (90 days) | 99.94% | 98.73% |
| Incidents (90 days) | 2 | 35 |
| Partial / major outages | 1 | 1 |
| Avg time to resolve | 2h 40m | 6h 8m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Cohere and OpenAI API differ
- OpenAI API reported 17.5× as many incidents as Cohere over the last 90 days (35 vs 2).
- Cohere fixes problems faster: 2h 40m on average, against 6h 8m for OpenAI API (2.3× quicker).
- Cohere's longest outage on record lasted 1h 18m (Feb 13, 2026); OpenAI API's lasted 40m (Sep 15, 2026).
90-day uptime
Cohere
OpenAI API
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Cohere incidents
- Degraded performanceSep 1, 2026 · resolved in 4h 22m
Affected: embeddings, rerank-english-v3.0, embed-v4.0, command-a-reasoning-08-2025, rerank-v4.0-fast, All Endpoints
- Partial outageAug 5, 2026 · resolved in 57m
Documentation Content Loading Issues
Affected: Docs
Recent OpenAI API incidents
- Degraded performanceOct 30, 2026 · resolved in 4h 1m
Elevated errors for GPT Image 2 API image edits
Affected: Images
- Degraded performanceOct 27, 2026 · resolved in 1h 18m
6.1 Sol Degraded Model Performance
Affected: Chat Completions, Responses, Batch
- InformationalOct 27, 2026 · resolved in 29m
- InformationalOct 23, 2026 · resolved in 33m
- InformationalOct 23, 2026 · resolved in 2h 17m
- Degraded performanceOct 22, 2026 · resolved in 6h 32m
Elevated ChatGPT conversation and Responses API errors
Affected: Conversations, Responses
Other LLM API providers to consider
- Perplexity API · #1 · 99.94% uptime
- Groq · #3 · 99.94% uptime
- Cerebras Inference · #4 · 99.88% uptime
- xAI API · #5 · 99.76% uptime