GLM 5.1 vs gpt-oss-120b
Head to head on 19 shared benchmarks, with price, context window, and release dates.
Benchmark scores
47evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GLM 5.1 Zai | 64.5% | 40.0% | 1589elo | 73.5 | 83.9% | 27.9% | 52.0% | 72.7% | 75.4% | 63.2% | 68.5% | 71.8% | 84.9% | 72.5% | 85.4% | 36.1% | 71.2% | 35.6% | 97.1% | - | - | 20.8% | 35.9% | 1.13 | - | - | 44.8% | 33.5% | 34.7% | 15.1% | - | - | - | - | 67.0% | 41.6% | 72.3% | - | 22.2% | 34.6% | 5.24 | - | - | - | 69.8 | 52.5% | 31.5% | 53.6% |
| gpt-oss-120b OpenAI | 58.2% | 13.0% | 959elo | 35.8 | 67.2% | 5.9% | 58.3% | 51.0% | 60.2% | 38.8% | 50.3% | 48.6% | 68.9% | 39.2% | 77.5% | 36.0% | 71.6% | 5.3% | 45.0% | 41.8% | 66.7% | - | - | - | 38.9% | 7.6% | - | - | - | - | 57.6 | 70.7% | 1.62 | 1.53 | - | - | - | 80.0% | - | - | - | 97.9% | 26.0% | 65.6% | - | - | - | 49.6% |
2 / 2 models
| Attribute | GLM 5.1 Zai | gpt-oss-120b OpenAI |
|---|---|---|
| Description | GLM-5.1 is an AI model from Zai, released with open weights. | GPT-Oss 120b is an AI model from OpenAI, released with open weights. |
| Family | Glm | GPT |
| Params | - | - |
| Open weights | open | open |
| License | mit | apache-2.0 |
| Released | 7 Apr 2026 | 5 Aug 2025 |
| Context | 204,800 | 131,072 |
| Input $/1M | $1.39 | $0.15 |
| Output $/1M | $4.40 | $0.60 |
| Cache read $/1M | $0.234 | $0.030 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 186 tok/s |
| Latency | 0.00 s | 0.50 s |
| Modalities | text | text |
| 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% | GPQA Diamond67.2% (AA) Humanity's Last Exam (HLE)5.9% (AA) LiveCodeBench70.7% (AA) MMLU-Pro77.5% (AA) SciCode36.0% (AA) |
FAQ
- Is GLM 5.1 or gpt-oss-120b better?
- Across the 19 benchmarks both models report on Sophon, GLM 5.1 leads on 17 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GLM 5.1 and gpt-oss-120b compare on GPQA Diamond?
- GLM 5.1 scores 83.9% and gpt-oss-120b scores 67.2% on GPQA Diamond.
- Which is cheaper, GLM 5.1 or gpt-oss-120b?
- gpt-oss-120b is cheaper at $0.60 per million output tokens against $4.40 for GLM 5.1 - about 7.3x.
- When were GLM 5.1 and gpt-oss-120b released?
- GLM 5.1 was released 7 Apr 2026 by Zai. gpt-oss-120b was released 5 Aug 2025 by OpenAI.
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