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% | 35.0% | 1592elo | 73.5 | 86.8% | 30.1% | 76.3% | 72.7% | 75.4% | 63.2% | 68.5% | 71.8% | 84.9% | 72.5% | 85.4% | 44.8% | 71.2% | 43.2% | 97.7% | - | - | 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% | 55.0% |
| gpt-oss-120b OpenAI | 58.2% | 11.0% | 961elo | 35.8 | 78.2% | 19.6% | 69.0% | 51.0% | 60.2% | 38.8% | 50.3% | 48.6% | 68.9% | 39.2% | 80.8% | 34.0% | 71.6% | 23.5% | 65.8% | 41.8% | 93.4% | - | - | - | 38.9% | 7.6% | - | - | - | - | 57.6 | 87.8% | 1.62 | 1.53 | - | - | - | 80.0% | - | - | - | 97.9% | 26.0% | 65.6% | - | - | - | 54.1% |
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 | $1.28 | $0.15 |
| Output $/1M | $4.07 | $0.59 |
| Cache read $/1M | $0.179 | $0.075 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 209 tok/s |
| Latency | 0.00 s | 0.51 s |
| Modalities | text | text |
| Providers | - | - |
| Publisher | Zai | OpenAI |
| Reported scores | IFBench76.3% (AA) τ²-bench (Tau²-bench)97.7% (AA) Terminal-Bench (Hard)43.2% (AA) Vals Index52.5% Vibe Code Bench v1.131.5% | GPQA Diamond78.2% (AA) Humanity's Last Exam (HLE)19.6% (AA) LiveCodeBench87.8% (AA) MMLU-Pro80.8% (AA) SciCode34.0% (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 18 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 86.8% and gpt-oss-120b scores 78.2% on GPQA Diamond.
- Which is cheaper, GLM 5.1 or gpt-oss-120b?
- gpt-oss-120b is cheaper at $0.59 per million output tokens against $4.07 for GLM 5.1 - about 6.9x.
- 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.
Other head-to-heads
56Gemini 3.1 Pro Preview vs GLM 5.132 shared evalsGLM 5.1 vs GPT-5.531 shared evalsClaude Opus 4.7 vs GLM 5.128 shared evalsClaude Opus 4.8 vs GLM 5.127 shared evalsClaude Opus 4.6 vs GLM 5.127 shared evalsGLM 5.1 vs GPT-5.426 shared evalsGLM 5.1 vs Kimi K2.526 shared evalsGLM 5.1 vs GPT-5 Mini25 shared evalsGPT-5 Mini vs gpt-oss-120b25 shared evalsGLM 5.1 vs GPT-5.225 shared evalsClaude Fable 5 vs GLM 5.125 shared evalsClaude Sonnet 4.6 vs GLM 5.125 shared evalsDeepSeek V3.2 vs GLM 5.124 shared evalsGLM 5.1 vs GPT-5.4 Mini24 shared evalsClaude Sonnet 4.5 vs GLM 5.123 shared evalsClaude Sonnet 4.5 vs gpt-oss-120b23 shared evalsClaude Opus 4.5 vs GLM 5.123 shared evalsGLM 5.1 vs Qwen3.6 Plus23 shared evalsGLM 5.1 vs Grok 4.1 Fast23 shared evalsDeepSeek V3.2 vs gpt-oss-120b23 shared evalsGPT-5 Nano vs gpt-oss-120b22 shared evalsGPT-5.2 vs gpt-oss-120b22 shared evalsGLM 4.7 vs GLM 5.122 shared evalsGLM 5.1 vs GPT-5 Nano21 shared evalsClaude Opus 4.5 vs gpt-oss-120b21 shared evalsClaude 4 Sonnet vs gpt-oss-120b21 shared evalsClaude 4 Sonnet vs GLM 5.120 shared evalsgpt-oss-120b vs Grok 4.1 Fast20 shared evalsGLM 4.7 vs gpt-oss-120b20 shared evalsGPT-5.5 vs gpt-oss-120b19 shared evalsClaude Opus 4.6 vs gpt-oss-120b19 shared evalsgpt-oss-120b vs Kimi K2.519 shared evalsGemini 2.5 Pro vs GLM 5.119 shared evalsGemini 2.5 Pro vs gpt-oss-120b19 shared evalsGemini 3.1 Pro Preview vs gpt-oss-120b18 shared evalsClaude Opus 4.8 vs gpt-oss-120b18 shared evalsClaude Fable 5 vs gpt-oss-120b18 shared evalsGPT-5.4 vs gpt-oss-120b18 shared evalsClaude Sonnet 4.6 vs gpt-oss-120b18 shared evalsClaude Opus 4.7 vs gpt-oss-120b18 shared evalsGPT-5 vs gpt-oss-120b17 shared evalsGPT-4o vs gpt-oss-120b17 shared evalsGPT-5.4 Mini vs gpt-oss-120b17 shared evalsGLM 5.1 vs GPT-516 shared evalsGPT-4.1 vs gpt-oss-120b16 shared evalsgpt-oss-120b vs Qwen3.6 Plus16 shared evalsGPT-4.1 Mini vs gpt-oss-120b15 shared evalsGPT-4o-mini vs gpt-oss-120b15 shared evalsGLM 5.1 vs GPT-6 Astra14 shared evalsGLM 5.1 vs GPT-4o14 shared evalsGPT-4.1 Nano vs gpt-oss-120b14 shared evalsGLM 5.1 vs GPT-4o-mini12 shared evalsGLM 5.1 vs GPT-4.1 Nano12 shared evalsGLM 5.1 vs GPT-4.1 Mini11 shared evalsGLM 5.1 vs GPT-4.111 shared evalsGPT-6 Astra vs gpt-oss-120b6 shared evals
Comparing something else? Build your own side-by-side.