Home Compare ChatGPT vs DeepSeek Chat AI Chat Assistants · reliability comparison
ChatGPT vs DeepSeek Chat: which is more reliable? (2026) DeepSeek Chat is more reliable than ChatGPT, scoring 77.4 vs 32.3 out of 100. Over the last 90 days ChatGPT reported 84 incidents and DeepSeek Chat reported 20, with effective uptime of 96.87% and 100% respectively.
Data updated Nov 2, 2026 · How we score
Metric ChatGPT DeepSeek Chat Reliability score 32.3 77.4 Rank (AI chat assistants) #7 #4 Uptime (90 days) 96.87% 100% Incidents (90 days) 84 20 Partial / major outages 9 4 Avg time to resolve 6h 19m — Outages we detected 0 0 Transparency score 100/100 100/100
Where ChatGPT and DeepSeek Chat differ ChatGPT reported 4.2× as many incidents as DeepSeek Chat over the last 90 days (84 vs 20). ChatGPT had 9 partial or major outages, compared with 4 for DeepSeek Chat. 90-day uptime ChatGPT Aug 5, 2026: 94.71% uptime, 3 incidents (Degraded performance) Aug 6, 2026 – Aug 9, 2026: no incidents Aug 10, 2026: 93.30% uptime, 2 incidents (Degraded performance) Aug 11, 2026: 96.22% uptime, 4 incidents (Degraded performance) Aug 12, 2026: no incidents Aug 13, 2026: 93.80% uptime, 2 incidents (Degraded performance) Aug 14, 2026 – Aug 17, 2026: no incidents Aug 18, 2026: 99.78% uptime, 1 incident (Degraded performance) Aug 19, 2026: no incidents Aug 20, 2026: 97.62% uptime, 2 incidents (Degraded performance) Aug 21, 2026: 96.68% uptime, 1 incident (Degraded performance) Aug 22, 2026 – Aug 26, 2026: no incidents Aug 27, 2026: 97.35% uptime, 1 incident (Degraded performance) Aug 28, 2026 – Aug 30, 2026: no incidents Aug 31, 2026: 88.75% uptime, 1 incident (Partial outage) Sep 1, 2026: 99.77% uptime, 1 incident (Degraded performance) Sep 2, 2026: 99.67% uptime, 1 incident (Degraded performance) Sep 3, 2026: 98.39% uptime, 2 incidents (Partial outage) Sep 4, 2026: 97.64% uptime, 1 incident (Degraded performance) Sep 5, 2026 – Sep 7, 2026: no incidents Sep 8, 2026: 95.34% uptime, 2 incidents (Degraded performance) Sep 9, 2026: 98.80% uptime, 2 incidents (Degraded performance) Sep 10, 2026: 91.19% uptime, 3 incidents (Degraded performance) Sep 11, 2026: 93.74% uptime, 2 incidents (Degraded performance) Sep 12, 2026: 98.77% uptime, 1 incident (Degraded performance) Sep 13, 2026: 98.55% uptime, 2 incidents (Degraded performance) Sep 14, 2026: 88.72% uptime, 3 incidents (Degraded performance) Sep 15, 2026: 97.57% uptime, 2 incidents (Degraded performance) Sep 16, 2026: 99.47% uptime, 1 incident (Degraded performance) Sep 17, 2026: 96.27% uptime, 2 incidents (Partial outage) Sep 18, 2026: 98.50% uptime, 3 incidents (Degraded performance) Sep 19, 2026: 95.07% uptime, 2 incidents (Degraded performance) Sep 20, 2026 – Sep 21, 2026: no incidents Sep 22, 2026: 99.02% uptime, 2 incidents (Degraded performance) Sep 23, 2026: 99.31% uptime, 2 incidents (Degraded performance) Sep 24, 2026: 99.51% uptime, 1 incident (Degraded performance) Sep 25, 2026 – Sep 28, 2026: no incidents Sep 29, 2026: 96.13% uptime, 2 incidents (Degraded performance) Sep 30, 2026: 85.00% uptime, 3 incidents (Degraded performance) Oct 1, 2026: 83.70% uptime, 3 incidents (Partial outage) Oct 2, 2026: 88.82% uptime, 2 incidents (Degraded performance) Oct 3, 2026 – Oct 4, 2026: no incidents Oct 5, 2026: 89.41% uptime, 5 incidents (Degraded performance) Oct 6, 2026: 93.31% uptime, 7 incidents (Degraded performance) Oct 7, 2026: 76.97% uptime, 4 incidents (Partial outage) Oct 8, 2026: 99.02% uptime, 1 incident (Degraded performance) Oct 9, 2026: 91.50% uptime, 3 incidents (Partial outage) Oct 10, 2026: 84.35% uptime, 2 incidents (Partial outage) Oct 11, 2026: 85.00% uptime, 1 incident (Degraded performance) Oct 12, 2026: 89.97% uptime, 1 incident (Degraded performance) Oct 13, 2026: 94.72% uptime, 1 incident (Degraded performance) Oct 14, 2026: 93.88% uptime, 2 incidents (Degraded performance) Oct 15, 2026: 81.43% uptime, 2 incidents (Partial outage) Oct 16, 2026: 93.28% uptime, 1 incident (Degraded performance) Oct 17, 2026 – Oct 18, 2026: no incidents Oct 19, 2026: 99.56% uptime, 1 incident (Degraded performance) Oct 20, 2026: 97.91% uptime, 1 incident (Partial outage) Oct 21, 2026: 99.35% uptime, 1 incident (Degraded performance) Oct 22, 2026: 94.61% uptime, 2 incidents (Degraded performance) Oct 23, 2026: 99.47% uptime, 3 incidents (Degraded performance) Oct 24, 2026 – Oct 29, 2026: no incidents Oct 30, 2026: 99.00% uptime, 1 incident (Degraded performance) Oct 31, 2026 – Nov 2, 2026: no incidents 90 days ago 96.890% average daily uptime Today DeepSeek Chat Aug 5, 2026 – Aug 6, 2026: no incidents Aug 7, 2026: 100% uptime, 1 incident (Degraded performance) Aug 8, 2026 – Aug 13, 2026: no incidents Aug 14, 2026: 100% uptime, 2 incidents (Degraded performance) Aug 15, 2026 – Aug 17, 2026: no incidents Aug 18, 2026: 100% uptime, 1 incident (Degraded performance) Aug 19, 2026: 100% uptime, 1 incident (Degraded performance) Aug 20, 2026: no incidents Aug 21, 2026: 100% uptime, 1 incident (Degraded performance) Aug 22, 2026 – Sep 1, 2026: no incidents Sep 2, 2026: 100% uptime, 1 incident (Major outage) Sep 3, 2026 – Sep 13, 2026: no incidents Sep 14, 2026: 100% uptime, 1 incident (Major outage) Sep 15, 2026: 100% uptime, 2 incidents (Degraded performance) Sep 16, 2026: no incidents Sep 17, 2026: 100% uptime, 1 incident (Degraded performance) Sep 18, 2026 – Sep 19, 2026: no incidents Sep 20, 2026: 100% uptime, 1 incident (Degraded performance) Sep 21, 2026 – Sep 22, 2026: no incidents Sep 23, 2026: 100% uptime, 2 incidents (Degraded performance) Sep 24, 2026 – Sep 30, 2026: no incidents Oct 1, 2026: 100% uptime, 1 incident (Degraded performance) Oct 2, 2026 – Oct 7, 2026: no incidents Oct 8, 2026: 100% uptime, 1 incident (Degraded performance) Oct 9, 2026 – Oct 11, 2026: no incidents Oct 12, 2026: 100% uptime, 2 incidents (Major outage) Oct 13, 2026 – Oct 14, 2026: no incidents Oct 15, 2026: 100% uptime, 1 incident (Major outage) Oct 16, 2026 – Oct 19, 2026: no incidents Oct 20, 2026: 100% uptime, 1 incident (Degraded performance) Oct 21, 2026 – Nov 2, 2026: no incidents 90 days ago 100% average daily uptime Today