Compare models
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 GPT-5OpenAI | o3 OpenAI |  Gemini 2.5 Flash | |
|---|---|---|---|
| Vendor | OpenAI | OpenAI | |
| Family | GPT | o-series | Gemini |
| Release date | 2025-08-07 | 2025-04-16 | — |
| Context window | 400,000 tokens | 200,000 tokens | 1,000,000 tokens |
| Parameters | — | — | — |
| Modality | text, vision, audio | text, vision | text, vision, audio |
| License | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary |
| Description | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. | Reasoning-focused model in the o-series. | — |
| Links |
