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 o3OpenAI |  Gemini 3.5 Flash |  Claude 4.7 OpusAnthropic | GPT-5 Pro OpenAI | |
|---|---|---|---|---|
| Vendor | OpenAI | Anthropic | OpenAI | |
| Family | o-series | Gemini | Claude | GPT |
| Release date | 2025-04-16 | 2026-05-20 | 2026-04-16 | 2025-08-07 |
| Context window | 200,000 tokens | — | 1,000,000 tokens | 400,000 tokens |
| Parameters | — | — | — | — |
| Modality | text, vision | text, vision, audio | text, vision | text, vision, audio |
| License | proprietary | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary | proprietary |
| Description | Reasoning-focused model in the o-series. | 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. | Anthropic's previous Opus flagship — superseded by Opus 4.8 on May 28, 2026 (42-day cycle). Optimized for complex reasoning and coding. Improved software engineering, long-running coding tasks, and higher-resolution vision over Claude 4.6. | Higher-reasoning variant of GPT-5, used for harder scientific and research tasks (e.g., immunology breakthroughs at NIH). Same 400K context as GPT-5; trades latency for depth. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | — | 88.2% | — |
| GPQA-D | 87.7% | — | 90.1% | — |
| HumanEval | — | — | 97.4% | — |
| Aider | — | — | 91.2% | — |
| AIME-25 | 88.9% | — | 93.5% | — |
| LiveCB | — | — | 80.2% | — |
| MMMU | — | — | 79.0% | — |
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