Xentir GLM-5.1 vs GPT-5 Pro
GLM-5.1 OPEN WEIGHTS · Z.ai (Zhipu AI), released 2026-04-07
GPT-5 Pro · OpenAI, released 2025-10-07
“Epoch AI, 'AI Benchmarking Hub'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks' [online resource].” · epoch.ai/benchmarks · Licensed CC BY 4.0 · data last verified 2026-09-09 · Methodology · Data Sources
GPT-5 Pro leads on more of the 2 benchmarks where both are measured — GPT-5 Pro on 2. The remaining 7 of 9 tracked benchmarks cannot be compared: 6 have a result for only one of the two models, 1 for neither. Nothing on this page is estimated to fill those in.
Head-to-head
Measured on 2 of 9 tracked benchmarks for both models — GPT-5 Pro leads on 2.
| Benchmark | GLM-5.1 | GPT-5 Pro | Leads |
|---|---|---|---|
| Epoch Capabilities Index (ECI) | 149.7 | 150.3 | GPT-5 Pro |
| SWE-bench Verified | 0.742 | Not measured | Comparison unavailable — GPT-5 Pro has no published result |
| GPQA Diamond | 0.899 | Not measured | Comparison unavailable — GPT-5 Pro has no published result |
| MATH Level 5 | Not measured | Not measured | Not measured on both |
| OTIS Mock AIME 2024-2025 | 0.933 | Not measured | Comparison unavailable — GPT-5 Pro has no published result |
| FrontierMath | 0.334 | Not measured | Comparison unavailable — GPT-5 Pro has no published result |
| FrontierMath Tier 4 | 0.125 | 0.146 (high) | GPT-5 Pro |
| SimpleQA Verified | 0.340 | Not measured | Comparison unavailable — GPT-5 Pro has no published result |
| Chess Puzzles | 0.190 | Not measured | Comparison unavailable — GPT-5 Pro has no published result |
What remains uncertain
- GPT-5 Pro has no published result on Chess Puzzles, FrontierMath, GPQA Diamond, OTIS Mock AIME 2024-2025, SWE-bench Verified, SimpleQA Verified.
- 1 tracked benchmark has no published result for either model.
A missing result means Xentir has not found one published by the source it cites, not that the model performs badly. See Data Sources.
Reference price
| Per 1M tokens | GLM-5.1 | GPT-5 Pro |
|---|---|---|
| Output | — | $120.00 |
List price as published by the vendor. Xentir does not verify negotiated or enterprise rates, and price is not a measure of capability — see Data Sources.