Gemini 3.5 Flash vs GPT-5
Head to head on 16 shared benchmarks, with price, context window, and release dates.
Benchmark scores
75evals · sort by any column, ⤢ to expand fullscreen
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| Gemini 3.5 Flash Google (Alphabet Inc.) | 64.7% | 71.8 | 39.0% | 92.2% | 42.7% | 76.3% | 55.8% | 76.6% | 68.1% | 31.0% | 49.9% | 53.1% | 74.4% | 40.9% | 48.7% | 95.3% | - | - | - | - | - | - | - | - | - | - | 26.0% | - | - | - | 1087elo | - | 57.9% | - | - | - | - | - | - | - | - | 78.9% | 78.2% | 64.9% | 75.6% | 84.6% | 88.2% | 82.0% | - | - | - | - | - | - | 76.3% | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 53.1% | 62.9% | - | - | - | 64.3% |
| GPT-5 OpenAI | 61.1% | 72.8 | 32.4% | 85.4% | 28.5% | 73.1% | 49.6% | 83.7% | 65.5% | 18.0% | 43.7% | 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% | - | 1623elo | - | 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% | 87.1% | 0.0% | 60.0% | 0.26 | 0.0% | 74.9% | 74.4% | 2.34 | 87.5% | 0.86 | - | - | 54.8% | 90.0% | 90.0% | 61.9% |
2 / 2 models
| Attribute | Gemini 3.5 Flash Google (Alphabet Inc.) | GPT-5 OpenAI |
|---|---|---|
| Description | Gemini 3.5 Flash is an AI model from Google (Alphabet Inc.). | OpenAI's August 2025 unified frontier model that auto-routes between a fast model and a deeper "thinking" variant. |
| Family | Gemini | GPT 5 |
| Params | - | Undisclosed (closed) |
| Open weights | closed | closed |
| License | proprietary | Proprietary |
| Released | 19 May 2026 | 7 Aug 2025 |
| Context | 1,048,576 | 400,000 |
| Input $/1M | $1.50 | $1.25 |
| Output $/1M | $9.00 | $10.00 |
| Cache read $/1M | $0.150 | $0.125 |
| 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, image, file |
| Providers | - | openai |
| Publisher | Google (Alphabet Inc.) | OpenAI |
| 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% | SWE-bench74.9% (Verified) GPQA Diamond85.4% (AA) Humanity's Last Exam (HLE)28.5% (AA) IFBench73.1% (AA) |
FAQ
- Is Gemini 3.5 Flash or GPT-5 better?
- Across the 16 benchmarks both models report on Sophon, Gemini 3.5 Flash leads on 14 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Gemini 3.5 Flash and GPT-5 compare on GPQA Diamond?
- Gemini 3.5 Flash scores 92.2% and GPT-5 scores 85.4% on GPQA Diamond.
- Which is cheaper, Gemini 3.5 Flash or GPT-5?
- Gemini 3.5 Flash is cheaper at $9.00 per million output tokens against $10.00 for GPT-5 - about 1.1x.
- When were Gemini 3.5 Flash and GPT-5 released?
- Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.). GPT-5 was released 7 Aug 2025 by OpenAI.
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