Gemini 3.5 Flash vs GPT-4o
Head to head on 14 shared benchmarks, with price, context window, and release dates.
Benchmark scores
48evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gemini 3.5 Flash Google (Alphabet Inc.) | 64.7% | 39.0% | 92.2% | 42.7% | 76.3% | 78.9% | 78.2% | 75.6% | 84.6% | 68.1% | 53.1% | 74.4% | 40.9% | 95.3% | - | - | - | - | - | - | 26.0% | - | 1087elo | 71.8 | 57.9% | - | - | 64.9% | 88.2% | 82.0% | - | - | 76.3% | 55.8% | - | 76.6% | - | - | 31.0% | 49.9% | - | - | - | - | 53.1% | 62.9% | 48.7% | - | 64.3% |
| GPT-4o OpenAI | 45.9% | 0.3% | 54.3% | 2.4% | 34.3% | 55.1% | 46.1% | 70.1% | 49.0% | 57.4% | 33.3% | 74.5% | 8.3% | 25.1% | 18.2% | 15.0% | 6.0% | 38 | 0.0% | 0.33 | - | 6.1% | - | - | - | 96.1 | 0.0% | - | - | - | 30.9% | 75.9% | - | - | 10.8% | - | 74.8% | 54.0% | - | - | 5.71 | 21.6% | 61.2 | 0.98 | - | - | - | 32.5% | 33.4% |
2 / 2 models
| Attribute | Gemini 3.5 Flash Google (Alphabet Inc.) | GPT-4o OpenAI |
|---|---|---|
| Description | Gemini 3.5 Flash is an AI model from Google (Alphabet Inc.). | GPT-4o is an AI model from OpenAI. |
| Family | Gemini | GPT |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | proprietary |
| Released | 19 May 2026 | 20 Nov 2024 |
| Context | 1,048,576 | 128,000 |
| Input $/1M | $1.50 | $2.50 |
| Output $/1M | $9.00 | $10.00 |
| Cache read $/1M | $0.150 | $1.250 |
| 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 | - | - |
| 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% | Taubench61.2 pass^1 GSM8K96.1 Accuracy ScholarSearch5.71 Social Sciences & Humanities (%) MortgageTax57.4% AIME202438 pass@1 |
FAQ
- Is Gemini 3.5 Flash or GPT-4o better?
- Across the 14 benchmarks both models report on Sophon, Gemini 3.5 Flash leads on 13 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-4o compare on GPQA Diamond?
- Gemini 3.5 Flash scores 92.2% and GPT-4o scores 54.3% on GPQA Diamond.
- Which is cheaper, Gemini 3.5 Flash or GPT-4o?
- Gemini 3.5 Flash is cheaper at $9.00 per million output tokens against $10.00 for GPT-4o - about 1.1x.
- When were Gemini 3.5 Flash and GPT-4o released?
- Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.). GPT-4o was released 20 Nov 2024 by OpenAI.
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