GLM 5.1 vs GPT-5 Mini
Head to head on 25 shared benchmarks, with price, context window, and release dates.
Benchmark scores
75evals · sort by any column, ⤢ to expand fullscreen
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| GLM 5.1 Zai | 1.13 | 64.5% | 1589elo | 73.5 | 33.5% | 83.9% | 27.9% | 52.0% | 72.7% | 75.4% | 63.2% | 68.5% | 71.8% | 84.9% | 72.5% | 41.6% | 72.3% | 85.4% | 22.2% | 36.1% | 5.24 | 71.2% | 35.6% | 31.5% | 97.1% | - | - | 20.8% | - | 35.9% | - | - | - | - | - | - | 40.0% | - | - | - | - | - | - | 44.8% | - | 34.7% | - | - | 15.1% | - | - | - | - | - | - | - | 67.0% | - | - | - | 34.6% | - | - | - | - | 69.8 | - | - | - | - | 52.5% | - | - | - | - | 53.6% |
| GPT-5 Mini OpenAI | 1.13 | 60.2% | 1310elo | 56.2 | 27.2% | 68.7% | 5.1% | 45.6% | 69.1% | 68.2% | 55.2% | 65.3% | 75.5% | 82.2% | 68.3% | 43.0% | 80.6% | 77.5% | 9.0% | 36.9% | 4.95 | 75.2% | 14.4% | 14.2% | 31.9% | 0.0% | 46.7% | - | 0.0% | - | 0.0% | -0.15 | 20.0% | 25.0% | 40.0% | 1.7 | - | 100.0% | 18.1% | 2.8% | 100.0% | 66.7% | 0.0% | - | 88.3% | - | 60.0% | 100.0% | - | 90.0% | 47.2% | 80.0% | 54.5% | 0.0% | 1.54 | 1.54 | - | 80.0% | 66.9% | 43.0% | - | 16.8% | 39.7% | 59.8% | 0.0% | - | 9.5% | 0.0% | 86.1% | 0.49 | - | 39.21 | 272.11 | 86.0% | 86.0% | 47.9% |
2 / 2 models
| Attribute | GLM 5.1 Zai | GPT-5 Mini OpenAI |
|---|---|---|
| Description | GLM-5.1 is an AI model from Zai, released with open weights. | GPT-5 mini is an AI model from OpenAI. |
| Family | Glm | GPT |
| Params | - | - |
| Open weights | open | closed |
| License | mit | proprietary |
| Released | 7 Apr 2026 | 7 Aug 2025 |
| Context | 204,800 | 400,000 |
| Input $/1M | $1.39 | $0.25 |
| Output $/1M | $4.40 | $2.00 |
| Cache read $/1M | $0.234 | $0.025 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text | text, image, file |
| Providers | - | - |
| 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 Mini better?
- Across the 25 benchmarks both models report on Sophon, GLM 5.1 leads on 19 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 Mini compare on GPQA Diamond?
- GLM 5.1 scores 83.9% and GPT-5 Mini scores 68.7% on GPQA Diamond.
- Which is cheaper, GLM 5.1 or GPT-5 Mini?
- GPT-5 Mini is cheaper at $2.00 per million output tokens against $4.40 for GLM 5.1 - about 2.2x.
- When were GLM 5.1 and GPT-5 Mini released?
- GLM 5.1 was released 7 Apr 2026 by Zai. GPT-5 Mini was released 7 Aug 2025 by OpenAI.
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