Gemini 3.5 Flash vs GPT-5
Direct spec comparison of Gemini 3.5 Flash (from Google) and GPT-5 (from OpenAI). Want a 3- or 4-way comparison? Open the multi-model tool →
 Gemini 3.5 Flash |  GPT-5OpenAI | |
|---|---|---|
| Vendor | OpenAI | |
| Family | Gemini | GPT |
| Release date | 2026-05-20 | 2025-08-07 |
| Context window | — | 400,000 tokens |
| Parameters | — | — |
| Modality | text, vision, audio | text, vision, audio |
| License | proprietary | proprietary |
| Source | proprietary | proprietary |
| Description | Fast, low-cost tier of the Gemini 3.5 family announced at Google I/O 2026. June 2026 update added native computer-use capability, moving Flash from generation to agentic task execution. | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. |
| Links | ||
| Benchmarks | ||
| MMLU-Pro | — | 85.1% |
| GPQA-D | — | 87.3% |
| HumanEval | — | 95.2% |
| Aider | — | 85.4% |
| AIME-25 | — | 91.0% |
| LiveCB | — | 74.5% |
| MMMU | — | 74.1% |
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