LLM API Providers · reliability comparison
Cerebras Inference vs OpenAI API: which is more reliable? (2026)
Cerebras Inference is more reliable than OpenAI API, scoring 89.3 vs 49.1 out of 100. Over the last 90 days Cerebras Inference reported 2 incidents and OpenAI API reported 35, with effective uptime of 99.88% and 98.73% respectively. Cerebras Inference resolves incidents faster on average (2h 29m).
Data updated Nov 2, 2026 · How we score
VS
| Metric | Cerebras Inference | OpenAI API |
|---|---|---|
| Reliability score | 89.3 | 49.1 |
| Rank (LLM API providers) | #4 | #9 |
| Uptime (90 days) | 99.88% | 98.73% |
| Incidents (90 days) | 2 | 35 |
| Partial / major outages | 1 | 1 |
| Avg time to resolve | 2h 29m | 6h 8m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Cerebras Inference and OpenAI API differ
- OpenAI API reported 17.5× as many incidents as Cerebras Inference over the last 90 days (35 vs 2).
- Cerebras Inference fixes problems faster: 2h 29m on average, against 6h 8m for OpenAI API (2.5× quicker).
- Cerebras Inference's longest outage on record lasted 9h 8m (Feb 4, 2026); OpenAI API's lasted 40m (Sep 15, 2026).
90-day uptime
Cerebras Inference
OpenAI API
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Cerebras Inference incidents
- Partial outageSep 25, 2026 · resolved in 4h 58m
Partial Service Disruptionofficial update ↗
Affected: GPT-OSS-120B, Qwen-3.8-27b
- Degraded performanceAug 27, 2026 · resolved in <1m
Affected: GPT-OSS-120B
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: Batch, Chat Completions, Responses
- 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: Responses, Conversations
Other LLM API providers to consider
- Perplexity API · #1 · 99.94% uptime
- Cohere · #2 · 99.94% uptime
- Groq · #3 · 99.94% uptime
- xAI API · #5 · 99.76% uptime