GLM 5.1 vs GPT-4.1 Nano
Head to head on 12 shared benchmarks, with price, context window, and release dates.
Benchmark scores
56evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GLM 5.1 Zai | 64.5% | 1589elo | 73.5 | 33.5% | 83.9% | 27.9% | 52.0% | 85.4% | 36.1% | 71.2% | 35.6% | 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% | 41.6% | 72.3% | - | 22.2% | 34.6% | 5.24 | - | - | 69.8 | - | 52.5% | 31.5% | - | - | 53.6% |
| GPT-4.1 Nano OpenAI | 42.1% | 944elo | 32.4 | 1.0% | 51.2% | 3.8% | 32.0% | 65.7% | 25.9% | 60.8% | 3.8% | 17.3% | 8.9% | 23.7% | 24.0% | - | 10.7% | - | - | 1.53 | -0.17 | 3.3% | 0.0% | 42.5% | - | - | - | 0.39 | - | 1.46 | 0.0% | - | - | - | - | - | - | - | 32.6% | 10.8% | 84.8% | - | - | - | 52.8% | - | - | - | 0.44 | 1.64 | - | 39.8% | - | - | 68.0% | 68.0% | 30.9% |
2 / 2 models
| Attribute | GLM 5.1 Zai | GPT-4.1 Nano OpenAI |
|---|---|---|
| Description | GLM-5.1 is an AI model from Zai, released with open weights. | GPT-4.1 Nano is an AI model from OpenAI. |
| Family | Glm | GPT |
| Params | - | - |
| Open weights | open | closed |
| License | mit | proprietary |
| Released | 7 Apr 2026 | 14 Apr 2025 |
| Context | 204,800 | 1,047,576 |
| Input $/1M | $1.39 | $0.10 |
| Output $/1M | $4.40 | $0.40 |
| 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 | image, text, 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-4.1 Nano better?
- Across the 12 benchmarks both models report on Sophon, GLM 5.1 leads on 12 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GLM 5.1 and GPT-4.1 Nano compare on GPQA Diamond?
- GLM 5.1 scores 83.9% and GPT-4.1 Nano scores 51.2% on GPQA Diamond.
- Which is cheaper, GLM 5.1 or GPT-4.1 Nano?
- GPT-4.1 Nano is cheaper at $0.40 per million output tokens against $4.40 for GLM 5.1 - about 11.0x.
- When were GLM 5.1 and GPT-4.1 Nano released?
- GLM 5.1 was released 7 Apr 2026 by Zai. GPT-4.1 Nano was released 14 Apr 2025 by OpenAI.
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