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 GPT-5.6 SolOpenAI | o3 OpenAI |  Gemini 2.5 Pro | Gemini 3.5 | |
|---|---|---|---|---|
| Vendor | OpenAI | OpenAI | ||
| Family | GPT | o-series | Gemini | Gemini |
| Release date | 2026-06-26 | 2025-04-16 | 2025-03-25 | 2026-05-20 |
| Context window | — | 200,000 tokens | 2,000,000 tokens | 2,000,000 tokens |
| Parameters | — | — | — | — |
| Modality | text, vision, audio | text, vision | text, vision, audio, video | text, vision, audio, video |
| License | proprietary | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary | proprietary |
| Description | Flagship of OpenAI's GPT-5.6 three-model suite (Sol / Terra / Luna), released as a limited preview. Strong gains in coding, cybersecurity, biology, and long-horizon agentic work. Pricing: $5 / $30 per million input/output tokens. | Reasoning-focused model in the o-series. | Predecessor to Gemini 3 Pro. | Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | — | 84.1% | 88.9% |
| GPQA-D | — | 87.7% | 84.0% | 91.2% |
| AIME-25 | — | 88.9% | — | 96.1% |
| MMMU | — | — | 72.4% | 86.0% |
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GPT-5.6 Sol✓
Claude 4.8 Opusmax
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Mistral Large 2maxMax 4 models. Remove one to add another.