LLM API Providers · reliability comparison
Cerebras Inference vs Perplexity API: which is more reliable? (2026)
Perplexity API is more reliable than Cerebras Inference, scoring 93.8 vs 89.3 out of 100. Over the last 90 days Cerebras Inference reported 2 incidents and Perplexity API reported 3, with effective uptime of 99.88% and 99.94% respectively. Perplexity API resolves incidents faster on average (36m).
Data updated Nov 1, 2026 · How we score
VS
| Metric | Cerebras Inference | Perplexity API |
|---|---|---|
| Reliability score | 89.3 | 93.8 |
| Rank (LLM API providers) | #4 | #1 |
| Uptime (90 days) | 99.88% | 99.94% |
| Incidents (90 days) | 2 | 3 |
| Partial / major outages | 1 | 1 |
| Avg time to resolve | 2h 29m | 36m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Cerebras Inference and Perplexity API differ
- Perplexity API reported 50% more incidents than Cerebras Inference over the last 90 days (3 vs 2).
- Perplexity API fixes problems faster: 36m on average, against 2h 29m for Cerebras Inference (4.2× quicker).
- Cerebras Inference's longest outage on record lasted 9h 8m (Feb 4, 2026); Perplexity API's lasted 4h 31m (Jun 4, 2026).
90-day uptime
Cerebras Inference
Perplexity API
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Cerebras Inference incidents
- Partial outageSep 25, 2026 · resolved in 4h 58m
Affected: GPT-OSS-120B, Qwen-3.8-27b
- Degraded performanceAug 27, 2026 · resolved in <1m
Affected: GPT-OSS-120B
Recent Perplexity API incidents
- Degraded performanceOct 9, 2026 · resolved in 37m
Elevated API errors and timeouts
Affected: Website, App, Computer, API
- Major outageAug 13, 2026 · resolved in 1h 4m
Affected: App
- Degraded performanceAug 11, 2026 · resolved in 6m
Other LLM API providers to consider
- Cohere · #2 · 99.94% uptime
- Groq · #3 · 99.94% uptime
- xAI API · #5 · 99.76% uptime
- DeepSeek API · #6 · 100% uptime