Gemini 3.5 Flash vs GLM 5.1
Head to head on 25 shared benchmarks, with price, context window, and release dates.
Benchmark scores
39evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gemini 3.5 Flash Google (Alphabet Inc.) | 64.7% | 26.0% | 71.8 | 57.9% | 39.0% | 92.2% | 42.7% | 76.3% | 78.9% | 78.2% | 64.9% | 75.6% | 84.6% | 88.2% | 82.0% | 76.3% | 55.8% | 76.6% | 31.0% | 53.1% | 74.4% | 40.9% | 53.1% | 48.7% | 95.3% | - | - | - | 1087elo | - | - | - | - | 68.1% | 49.9% | - | - | - | 62.9% | 64.3% |
| GLM 5.1 Zai | 64.5% | 40.0% | 73.5 | 44.8% | 33.5% | 86.8% | 30.1% | 76.3% | 72.7% | 75.4% | 63.2% | 68.5% | 71.8% | 84.9% | 72.5% | 67.0% | 41.6% | 72.3% | 22.2% | 43.8% | 71.2% | 43.2% | 52.5% | 31.5% | 97.7% | 20.8% | 35.9% | 1.13 | - | 1589elo | 34.7% | 15.1% | 85.4% | - | - | 34.6% | 5.24 | 69.8 | - | 55.1% |
2 / 2 models
| Attribute | Gemini 3.5 Flash Google (Alphabet Inc.) | GLM 5.1 Zai |
|---|---|---|
| Description | Gemini 3.5 Flash is an AI model from Google (Alphabet Inc.). | GLM-5.1 is an AI model from Zai, released with open weights. |
| Family | Gemini | Glm |
| Params | - | - |
| Open weights | closed | open |
| License | proprietary | mit |
| Released | 19 May 2026 | 7 Apr 2026 |
| Context | 1,048,576 | 204,800 |
| Input $/1M | $1.50 | $1.28 |
| Output $/1M | $9.00 | $4.07 |
| Cache read $/1M | $0.150 | $0.179 |
| Cache write $/1M | $0.083 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, video, file, audio | text |
| Providers | - | - |
| Publisher | Google (Alphabet Inc.) | Zai |
| Reported scores | Humanity's Last Exam (HLE)42.7% (AA) τ²-bench (Tau²-bench)95.3% (AA) Terminal-Bench (Hard)40.9% (AA) Vals Index53.1% | 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 Gemini 3.5 Flash or GLM 5.1 better?
- Across the 25 benchmarks both models report on Sophon, Gemini 3.5 Flash leads on 21 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Gemini 3.5 Flash and GLM 5.1 compare on GPQA Diamond?
- Gemini 3.5 Flash scores 92.2% and GLM 5.1 scores 86.8% on GPQA Diamond.
- Which is cheaper, Gemini 3.5 Flash or GLM 5.1?
- GLM 5.1 is cheaper at $4.07 per million output tokens against $9.00 for Gemini 3.5 Flash - about 2.2x.
- When were Gemini 3.5 Flash and GLM 5.1 released?
- Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.). GLM 5.1 was released 7 Apr 2026 by Zai.
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