GLM 5.1 vs GPT-5
Head to head on 16 shared benchmarks, with price, context window, and release dates.
Benchmark scores
81evals · sort by any column, ⤢ to expand fullscreen
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| GPT-5 OpenAI | 61.1% | 1627elo | 72.8 | 32.4% | 85.4% | 28.5% | 73.1% | 49.6% | 83.7% | 87.1% | 18.0% | 42.9% | 73.4% | 32.6% | 20.1% | 84.8% | 46.7% | 91.1% | 88.0% | 94.6% | 94.3% | - | 0.0% | - | - | 0.15 | 0.0% | 68.1% | 4.58 | - | 57.7% | 80.0% | 80.0% | - | 91.7% | - | 0.0% | 88.9% | 83.3% | - | 100.0% | 48.9% | 83.4% | 58.2% | - | - | - | - | - | - | - | 84.6% | 37.5% | 0.52 | 1.62 | 100.0% | 99.4% | - | 0.0% | 92.7% | 92.7% | 93.3% | 10.0% | 0.0% | 65.5% | 60.0% | 0.26 | 0.0% | 43.7% | - | - | 74.9% | 74.4% | 2.34 | - | 87.5% | 0.86 | - | 54.8% | 90.0% | 90.0% | 61.9% |
| GLM 5.1 Zai | 64.5% | 1592elo | 73.5 | 33.5% | 86.8% | 30.1% | 76.3% | 41.6% | 72.3% | 85.4% | 22.2% | 44.8% | 71.2% | 43.2% | 31.5% | 97.7% | - | - | - | - | - | 20.8% | - | 35.9% | 1.13 | - | - | - | - | 35.0% | - | - | - | 44.8% | - | 34.7% | - | - | - | 15.1% | - | - | - | - | 72.7% | 75.4% | 63.2% | 68.5% | 71.8% | 84.9% | 72.5% | - | - | - | - | - | - | 67.0% | - | - | - | - | - | - | - | - | - | - | - | 34.6% | 5.24 | - | - | - | 69.8 | - | - | 52.5% | - | - | - | 55.0% |
2 / 2 models
| Attribute | GLM 5.1 Zai | GPT-5 OpenAI |
|---|---|---|
| Description | GLM-5.1 is an AI model from Zai, released with open weights. | OpenAI's August 2025 unified frontier model that auto-routes between a fast model and a deeper "thinking" variant. |
| Family | Glm | GPT 5 |
| Params | - | Undisclosed (closed) |
| Open weights | open | closed |
| License | mit | proprietary |
| Released | 7 Apr 2026 | 7 Aug 2025 |
| Context | 204,800 | 400,000 |
| Input $/1M | $1.28 | $1.25 |
| Output $/1M | $4.07 | $10.00 |
| Cache read $/1M | $0.179 | $0.125 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text | text, image, file |
| Providers | - | openai |
| 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% | SWE-bench74.9% (Verified) GPQA Diamond85.4% (AA) Humanity's Last Exam (HLE)28.5% (AA) IFBench73.1% (AA) |
FAQ
- Is GLM 5.1 or GPT-5 better?
- Across the 16 benchmarks both models report on Sophon, GLM 5.1 leads on 11 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 compare on GPQA Diamond?
- GLM 5.1 scores 86.8% and GPT-5 scores 85.4% on GPQA Diamond.
- Which is cheaper, GLM 5.1 or GPT-5?
- GLM 5.1 is cheaper at $4.07 per million output tokens against $10.00 for GPT-5 - about 2.5x.
- When were GLM 5.1 and GPT-5 released?
- GLM 5.1 was released 7 Apr 2026 by Zai. GPT-5 was released 7 Aug 2025 by OpenAI.
Other head-to-heads
56GPT-4.1 Mini vs GPT-541 shared evalsGPT-5 vs GPT-5 Mini36 shared evalsGemini 3.1 Pro Preview vs GLM 5.132 shared evalsClaude Sonnet 4.5 vs GPT-531 shared evalsGLM 5.1 vs GPT-5.531 shared evalsGPT-5 vs GPT-5 Nano28 shared evalsGPT-4.1 vs GPT-528 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 evalsClaude 4 Sonnet vs GPT-525 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-524 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 vs GPT-5.223 shared evalsClaude Opus 4.5 vs GPT-523 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 evalsGLM 4.7 vs GLM 5.122 shared evalsGPT-4.1 Nano vs GPT-521 shared evalsGLM 5.1 vs GPT-5 Nano21 shared evalsGPT-5 vs Grok 4.1 Fast20 shared evalsClaude 4 Sonnet vs GLM 5.120 shared evalsGemini 3.1 Pro Preview vs GPT-519 shared evalsClaude Opus 4.6 vs GPT-519 shared evalsGPT-5 vs GPT-5.419 shared evalsDeepSeek V3.2 vs GPT-519 shared evalsGPT-4o vs GPT-519 shared evalsGemini 2.5 Pro vs GLM 5.119 shared evalsGLM 5.1 vs gpt-oss-120b19 shared evalsGPT-5 vs GPT-5.518 shared evalsGPT-5 vs Kimi K2.518 shared evalsClaude Opus 4.8 vs GPT-517 shared evalsClaude Opus 4.7 vs GPT-517 shared evalsGPT-5 vs gpt-oss-120b17 shared evalsGLM 4.7 vs GPT-517 shared evalsClaude Fable 5 vs GPT-516 shared evalsGPT-4o-mini vs GPT-516 shared evalsClaude Sonnet 4.6 vs GPT-516 shared evalsGPT-5 vs GPT-5.4 Mini16 shared evalsGPT-5 vs Qwen3.6 Plus15 shared evalsGLM 5.1 vs GPT-6 Astra14 shared evalsGLM 5.1 vs GPT-4o14 shared evalsGPT-5 vs GPT-6 Astra12 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 evals
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