GLM 5.1 vs GPT-5
Head to head on 16 shared benchmarks, with price, context window, and release dates.
Benchmark scores
81evals · sort by any column, ⤢ to expand fullscreen
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| GPT-5 OpenAI | 61.1% | 1623elo | 72.8 | 32.4% | 68.6% | 6.6% | 45.0% | 49.6% | 83.7% | 82.0% | 18.0% | 37.8% | 73.4% | 12.9% | 20.1% | 0.0% | 46.7% | 91.1% | 88.0% | 94.6% | 48.3% | - | 0.0% | - | - | 0.15 | 0.0% | 68.1% | 4.58 | - | 57.7% | 80.0% | 80.0% | - | 91.7% | - | 0.0% | 88.9% | 83.3% | - | 100.0% | 48.9% | 83.4% | 58.2% | - | - | - | - | - | - | - | 54.3% | 37.5% | 0.52 | 1.62 | 100.0% | 86.1% | - | 0.0% | 92.7% | 92.7% | 93.3% | 10.0% | 0.0% | 65.5% | 60.0% | 0.26 | 0.0% | 43.7% | - | - | 74.9% | 74.4% | 2.34 | - | 87.5% | 0.86 | - | 54.8% | 90.0% | 90.0% | 56.7% |
| GLM 5.1 Zai | 64.5% | 1589elo | 73.5 | 33.5% | 83.9% | 27.9% | 52.0% | 41.6% | 72.3% | 85.4% | 22.2% | 36.1% | 71.2% | 35.6% | 31.5% | 97.1% | - | - | - | - | - | 20.8% | - | 35.9% | 1.13 | - | - | - | - | 40.0% | - | - | - | 44.8% | - | 34.7% | - | - | - | 15.1% | - | - | - | - | 72.7% | 75.4% | 63.2% | 68.5% | 71.8% | 84.9% | 72.5% | - | - | - | - | - | - | 67.0% | - | - | - | - | - | - | - | - | - | - | - | 34.6% | 5.24 | - | - | - | 69.8 | - | - | 52.5% | - | - | - | 53.6% |
2 / 2 models
| Attribute | GLM 5.1 Zai | GPT-5 OpenAI |
|---|---|---|
| Description | GLM-5.1 is an AI model from Zai, released with open weights. | OpenAI's August 2025 unified frontier model that auto-routes between a fast model and a deeper "thinking" variant. |
| Family | Glm | GPT 5 |
| Params | - | Undisclosed (closed) |
| Open weights | open | closed |
| License | mit | Proprietary |
| Released | 7 Apr 2026 | 7 Aug 2025 |
| Context | 204,800 | 400,000 |
| Input $/1M | $1.39 | - |
| Output $/1M | $4.40 | - |
| Cache read $/1M | $0.234 | $0.125 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text | text, image, file |
| Providers | - | openai |
| Publisher | Zai | OpenAI |
| Reported scores | IFBench52.0% (AA) τ²-bench (Tau²-bench)97.1% (AA) Terminal-Bench (Hard)35.6% (AA) Vals Index52.5% Vibe Code Bench v1.131.5% |
FAQ
- Is GLM 5.1 or GPT-5 better?
- Across the 16 benchmarks both models report on Sophon, GLM 5.1 leads on 11 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GLM 5.1 and GPT-5 compare on GPQA Diamond?
- GLM 5.1 scores 83.9% and GPT-5 scores 68.6% on GPQA Diamond.
- When were GLM 5.1 and GPT-5 released?
- GLM 5.1 was released 7 Apr 2026 by Zai. GPT-5 was released 7 Aug 2025 by OpenAI.
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