LLM API Providers · reliability comparison

Anthropic API vs OpenAI API: which is more reliable? (2026)

OpenAI API is more reliable than Anthropic API, scoring 49.0 vs 36.8 out of 100. Over the last 90 days Anthropic API reported 36 incidents and OpenAI API reported 35, with effective uptime of 97.52% and 98.72% respectively. Anthropic API resolves incidents faster on average (3h 34m).

Data updated Nov 1, 2026 · How we score

Anthropic API

36.8/100

Operational

Visit Anthropic API ↗

OpenAI API

49.0/100

Operational

Visit OpenAI API ↗
VS
MetricAnthropic APIOpenAI API
Reliability score36.849.0
Rank (LLM API providers)#11#9
Uptime (90 days)97.52%98.72%
Incidents (90 days)3635
Partial / major outages231
Avg time to resolve3h 34m6h 8m
Outages we detected00
Transparency score100/100100/100

Where Anthropic API and OpenAI API differ

  • Anthropic API reported 3% more incidents than OpenAI API over the last 90 days (36 vs 35).
  • Anthropic API had 23 partial or major outages, compared with 1 for OpenAI API.
  • Anthropic API fixes problems faster: 3h 34m on average, against 6h 8m for OpenAI API.
  • Anthropic API's longest outage on record lasted 3d (Oct 7, 2026); OpenAI API's lasted 40m (Sep 15, 2026).

90-day uptime

Anthropic API

Aug 4, 2026: no dataAug 5, 2026: 95.32% uptime, 2 incidents (Degraded performance)Aug 6, 2026 – Aug 11, 2026: no incidentsAug 12, 2026: 97.32% uptime, 1 incident (Degraded performance)Aug 13, 2026: 96.70% uptime, 1 incident (Partial outage)Aug 14, 2026: 96.95% uptime, 1 incident (Partial outage)Aug 15, 2026: no incidentsAug 16, 2026: 97.52% uptime, 1 incident (Major outage)Aug 17, 2026: 99.03% uptime, 1 incident (Degraded performance)Aug 18, 2026: 98.31% uptime, 1 incident (Degraded performance)Aug 19, 2026: 99.16% uptime, 1 incident (Degraded performance)Aug 20, 2026: 98.78% uptime, 2 incidents (Partial outage)Aug 21, 2026 – Aug 23, 2026: no incidentsAug 24, 2026: 92.91% uptime, 1 incident (Partial outage)Aug 25, 2026 – Aug 31, 2026: no incidentsSep 1, 2026: 99.00% uptime, 2 incidents (Degraded performance)Sep 2, 2026: 98.20% uptime, 2 incidents (Partial outage)Sep 3, 2026: 93.19% uptime, 2 incidents (Partial outage)Sep 4, 2026 – Sep 9, 2026: no incidentsSep 10, 2026: 98.95% uptime, 1 incident (Degraded performance)Sep 11, 2026: 99.39% uptime, 1 incident (Partial outage)Sep 12, 2026 – Sep 14, 2026: no incidentsSep 15, 2026: 97.00% uptime, 1 incident (Partial outage)Sep 16, 2026 – Sep 21, 2026: no incidentsSep 22, 2026: 96.59% uptime, 1 incident (Partial outage)Sep 23, 2026 – Sep 28, 2026: no incidentsSep 29, 2026: 95.63% uptime, 1 incident (Partial outage)Sep 30, 2026: no incidentsOct 1, 2026: 96.08% uptime, 1 incident (Degraded performance)Oct 2, 2026 – Oct 4, 2026: no incidentsOct 5, 2026: 99.44% uptime, 1 incident (Partial outage)Oct 6, 2026: 99.35% uptime, 1 incident (Partial outage)Oct 7, 2026: 75.41% uptime, 3 incidents (Partial outage)Oct 8, 2026: 50.00% uptime, 1 incident (Partial outage)Oct 9, 2026: 50.00% uptime, 1 incident (Partial outage)Oct 10, 2026: 72.04% uptime, 1 incident (Partial outage)Oct 11, 2026 – Oct 20, 2026: no incidentsOct 21, 2026: 99.58% uptime, 1 incident (Degraded performance)Oct 22, 2026: no incidentsOct 23, 2026: 98.45% uptime, 1 incident (Major outage)Oct 24, 2026: 97.74% uptime, 3 incidents (Major outage)Oct 25, 2026: 95.42% uptime, 2 incidents (Partial outage)Oct 26, 2026: no incidentsOct 27, 2026: 97.10% uptime, 2 incidents (Partial outage)Oct 28, 2026 – Nov 1, 2026: no incidents
90 days ago97.536% average daily uptimeToday

OpenAI API

Aug 4, 2026: no incidentsAug 5, 2026: 94.71% uptime, 1 incident (Degraded performance)Aug 6, 2026 – Aug 10, 2026: no incidentsAug 11, 2026: 99.30% uptime, 1 incident (Degraded performance)Aug 12, 2026: no incidentsAug 13, 2026: 94.75% uptime, 1 incident (Degraded performance)Aug 14, 2026 – Aug 30, 2026: no incidentsAug 31, 2026: 99.04% uptime, 1 incident (Degraded performance)Sep 1, 2026: 88.06% uptime, 1 incident (Degraded performance)Sep 2, 2026: 99.67% uptime, 1 incident (Degraded performance)Sep 3, 2026 – Sep 7, 2026: no incidentsSep 8, 2026: 95.34% uptime, 1 incident (Degraded performance)Sep 9, 2026: 99.74% uptime, 1 incident (Degraded performance)Sep 10, 2026: 98.80% uptime, 1 incident (Degraded performance)Sep 11, 2026: 98.60% uptime, 1 incident (Degraded performance)Sep 12, 2026 – Sep 13, 2026: no incidentsSep 14, 2026: 97.29% uptime, 2 incidents (Degraded performance)Sep 15, 2026: 99.67% uptime, 1 incident (Partial outage)Sep 16, 2026: 98.93% uptime, 1 incident (Partial outage)Sep 17, 2026: 99.05% uptime, 1 incident (Degraded performance)Sep 18, 2026: 98.50% uptime, 3 incidents (Degraded performance)Sep 19, 2026: 95.07% uptime, 2 incidents (Degraded performance)Sep 20, 2026 – Sep 23, 2026: no incidentsSep 24, 2026: 99.51% uptime, 1 incident (Degraded performance)Sep 25, 2026 – Sep 28, 2026: no incidentsSep 29, 2026: 96.13% uptime, 2 incidents (Degraded performance)Sep 30, 2026: 85.00% uptime, 2 incidents (Degraded performance)Oct 1, 2026: 85.00% uptime, 1 incident (Degraded performance)Oct 2, 2026: 88.82% uptime, 1 incident (Degraded performance)Oct 3, 2026 – Oct 4, 2026: no incidentsOct 5, 2026: 94.89% uptime, 2 incidents (Degraded performance)Oct 6, 2026: 90.03% uptime, 4 incidents (Degraded performance)Oct 7, 2026 – Oct 13, 2026: no incidentsOct 14, 2026: 99.58% uptime, 1 incident (Degraded performance)Oct 15, 2026 – Oct 18, 2026: no incidentsOct 19, 2026: 99.56% uptime, 1 incident (Degraded performance)Oct 20, 2026: no incidentsOct 21, 2026: 98.63% uptime, 2 incidents (Degraded performance)Oct 22, 2026: 95.91% uptime, 1 incident (Degraded performance)Oct 23, 2026 – Oct 26, 2026: no incidentsOct 27, 2026: 99.18% uptime, 2 incidents (Degraded performance)Oct 28, 2026 – Oct 29, 2026: no incidentsOct 30, 2026: 97.48% uptime, 1 incident (Degraded performance)Oct 31, 2026 – Nov 1, 2026: no incidents
90 days ago98.737% average daily uptimeToday

Recent Anthropic API incidents

Full Anthropic API reliability report →

Recent OpenAI API incidents

Full OpenAI API reliability report →

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