Gemini 2.5 Pro vs GPT-5.6 Sol
Direct spec comparison of Gemini 2.5 Pro (from Google) and GPT-5.6 Sol (from OpenAI). Want a 3- or 4-way comparison? Open the multi-model tool →
 Gemini 2.5 Pro |  GPT-5.6 SolOpenAI | |
|---|---|---|
| Vendor | OpenAI | |
| Family | Gemini | GPT |
| Release date | 2025-03-25 | 2026-06-26 |
| Context window | 2,000,000 tokens | — |
| Parameters | — | — |
| Modality | text, vision, audio, video | text, vision, audio |
| License | proprietary | proprietary |
| Source | proprietary | proprietary |
| Description | Predecessor to Gemini 3 Pro. | 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. |
| Links | ||
| Benchmarks | ||
| MMLU-Pro | 84.1% | — |
| GPQA-D | 84.0% | — |
| MMMU | 72.4% | — |
More like this
Looking for a different head-to-head? Build your own comparison on the multi-model tool.
Or see all Gemini 2.5 Pro details / GPT-5.6 Sol details.