GLM 5.1 vs GPT-4.1
Head to head on 11 shared benchmarks, with price, context window, and release dates.
Benchmark scores
62evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| GLM 5.1 Zai | 64.5% | 1589elo | 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% | - | 73.5 | 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 OpenAI | 63.1% | 1417elo | 5.5% | 66.6% | 4.2% | 43.0% | 80.6% | 38.1% | 75.1% | 13.6% | 47.1% | 0.0% | 52.4% | 43.7% | 34.7% | 26.7% | - | 61.5% | - | - | 1.64 | 83.7% | 1.55 | - | 12.4% | - | - | - | 60.9% | - | - | - | - | - | - | - | - | 45.7% | 70.8% | 0.49 | 0.49 | 91.3% | - | 32.1% | 32.1% | - | 69.4% | - | 50.5% | 65.9% | - | 8.57 | - | - | 31.1% | 39.6% | 10.0% | - | - | - | 92.0% | 92.0% | 48.0% |
2 / 2 models
| Attribute | GLM 5.1 Zai | GPT-4.1 OpenAI |
|---|---|---|
| Description | GLM-5.1 is an AI model from Zai, released with open weights. | GPT-4.1 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 | $2.00 |
| Output $/1M | $4.40 | $8.00 |
| Cache read $/1M | $0.234 | $0.500 |
| 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% | ScholarSearch8.57 Social Sciences & Humanities (%) GPQA Diamond66.6% (AA) Humanity's Last Exam (HLE)4.2% (AA) IFBench43.0% (AA) |
FAQ
- Is GLM 5.1 or GPT-4.1 better?
- Across the 11 benchmarks both models report on Sophon, GLM 5.1 leads on 9 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 compare on GPQA Diamond?
- GLM 5.1 scores 83.9% and GPT-4.1 scores 66.6% on GPQA Diamond.
- Which is cheaper, GLM 5.1 or GPT-4.1?
- GLM 5.1 is cheaper at $4.40 per million output tokens against $8.00 for GPT-4.1 - about 1.8x.
- When were GLM 5.1 and GPT-4.1 released?
- GLM 5.1 was released 7 Apr 2026 by Zai. GPT-4.1 was released 14 Apr 2025 by OpenAI.
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