GLM 5.1 vs GPT-5 Nano
Head to head on 21 shared benchmarks, with price, context window, and release dates.
Benchmark scores
63evals · sort by any column, ⤢ to expand fullscreen
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| GLM 5.1 Zai | 1592elo | 73.5 | 33.5% | 86.8% | 30.1% | 76.3% | 72.7% | 75.4% | 63.2% | 68.5% | 71.8% | 84.9% | 72.5% | 41.6% | 72.3% | 85.4% | 22.2% | 44.8% | 71.2% | 43.2% | 97.7% | - | - | 20.8% | 35.9% | 1.13 | - | - | - | 64.5% | 35.0% | - | 44.8% | - | 34.7% | - | 15.1% | - | - | - | - | - | - | 67.0% | - | - | - | - | - | - | 34.6% | 5.24 | - | - | 69.8 | - | 52.5% | - | - | 31.5% | - | - | - | 55.0% |
| GPT-5 Nano OpenAI | 705elo | 28 | 8.3% | 67.6% | 9.5% | 67.6% | 52.8% | 62.4% | 43.4% | 55.7% | 46.8% | 68.4% | 40.3% | 30.4% | 72.9% | 78.0% | 12.0% | 36.6% | 67.4% | 12.1% | 36.5% | 0.0% | 83.7% | - | - | - | 0.25 | 0.21 | 6.7% | - | - | 10.0% | - | 78.2% | - | 1.18 | - | 100.0% | 78.9% | 1.38 | 1.38 | 100.0% | 100.0% | - | 26.7% | 53.6% | 100.0% | 0.0% | 0.0% | 30.4% | - | - | 1.72 | 34.8% | - | 29.7% | - | 20.41 | -6.67 | - | 82.0% | 82.0% | 40.0% | 48.9% |
2 / 2 models
| Attribute | GLM 5.1 Zai | GPT-5 Nano OpenAI |
|---|---|---|
| Description | GLM-5.1 is an AI model from Zai, released with open weights. | GPT-5 nano 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 | $1.28 | $0.05 |
| Output $/1M | $4.07 | $0.40 |
| Cache read $/1M | $0.179 | $0.005 |
| 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 | 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% |
FAQ
- Is GLM 5.1 or GPT-5 Nano better?
- Across the 21 benchmarks both models report on Sophon, GLM 5.1 leads on 20 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 Nano compare on GPQA Diamond?
- GLM 5.1 scores 86.8% and GPT-5 Nano scores 67.6% on GPQA Diamond.
- Which is cheaper, GLM 5.1 or GPT-5 Nano?
- GPT-5 Nano is cheaper at $0.40 per million output tokens against $4.07 for GLM 5.1 - about 10.2x.
- When were GLM 5.1 and GPT-5 Nano released?
- GLM 5.1 was released 7 Apr 2026 by Zai. GPT-5 Nano was released 7 Aug 2025 by OpenAI.
Other head-to-heads
56GPT-5 Mini vs GPT-5 Nano38 shared evalsGemini 3.1 Pro Preview vs GLM 5.132 shared evalsClaude Sonnet 4.5 vs GPT-5 Nano31 shared evalsGLM 5.1 vs GPT-5.531 shared evalsGPT-5 vs GPT-5 Nano28 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 evalsGPT-4.1 Mini vs GPT-5 Nano26 shared evalsGPT-5 Nano vs GPT-5.226 shared evalsClaude Opus 4.5 vs GPT-5 Nano26 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 evalsClaude 4 Sonnet vs GPT-5 Nano25 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 evalsGemini 2.5 Pro vs GPT-5 Nano24 shared evalsGPT-5 Nano vs Grok 4.1 Fast24 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 evalsGPT-5 Nano vs GPT-5.523 shared evalsClaude Opus 4.6 vs GPT-5 Nano23 shared evalsGLM 4.7 vs GPT-5 Nano23 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 evalsGemini 3.1 Pro Preview vs GPT-5 Nano22 shared evalsClaude Opus 4.8 vs GPT-5 Nano22 shared evalsGPT-5 Nano vs GPT-5.422 shared evalsGPT-5 Nano vs Kimi K2.522 shared evalsClaude Opus 4.7 vs GPT-5 Nano22 shared evalsDeepSeek V3.2 vs GPT-5 Nano22 shared evalsGPT-4.1 Nano vs GPT-5 Nano22 shared evalsGPT-5 Nano vs gpt-oss-120b22 shared evalsGLM 4.7 vs GLM 5.122 shared evalsClaude Fable 5 vs GPT-5 Nano21 shared evalsGPT-4.1 vs GPT-5 Nano20 shared evalsClaude Sonnet 4.6 vs GPT-5 Nano20 shared evalsGPT-5.4 Mini vs GPT-5 Nano20 shared evalsClaude 4 Sonnet vs GLM 5.120 shared evalsGPT-5 Nano vs Qwen3.6 Plus19 shared evalsGemini 2.5 Pro vs GLM 5.119 shared evalsGLM 5.1 vs gpt-oss-120b19 shared evalsGPT-4o vs GPT-5 Nano18 shared evalsGLM 5.1 vs GPT-516 shared evalsGPT-4o-mini vs GPT-5 Nano16 shared evalsGLM 5.1 vs GPT-6 Astra14 shared evalsGLM 5.1 vs GPT-4o14 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-5 Nano vs GPT-6 Astra10 shared evals
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