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 GPT-5.6 SolOpenAI | o3 OpenAI |  Gemini 2.5 Pro |  DeepSeek-V4-FlashDeepSeek | |
|---|---|---|---|---|
| Vendor | OpenAI | OpenAI | DeepSeek | |
| Family | GPT | o-series | Gemini | DeepSeek |
| Release date | 2026-06-26 | 2025-04-16 | 2025-03-25 | 2026-04-22 |
| Context window | — | 200,000 tokens | 2,000,000 tokens | 1,000,000 tokens |
| Parameters | — | — | — | 284B (13B active) |
| Modality | text, vision, audio | text, vision | text, vision, audio, video | text |
| License | proprietary | proprietary | proprietary | MIT |
| Source | proprietary | proprietary | proprietary | open weights |
| 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. | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | — | 84.1% | — |
| GPQA-D | — | 87.7% | 84.0% | — |
| AIME-25 | — | 88.9% | — | — |
| MMMU | — | — | 72.4% | — |
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GPT-5.6 Sol✓
Claude 4.8 Opusmax
Qwen3.7-MaxmaxGemini 3.5 FlashmaxGemini 3.5maxGemini OmnimaxGPT-5.5maxDeepSeek-V4-Flash✓Gemini 3 PromaxDeepSeek-V4-PromaxQwen3.6-27BmaxClaude 4.7 OpusmaxClaude 4.6 SonnetmaxClaude 4.5 HaikumaxDeepSeek-V3.1maxGPT-5 PromaxGPT-5max
Grok 4maxGemini 2.5 FlashmaxQwen3 235Bmaxo3✓GPT-4.1max
Llama 4 ScoutmaxLlama 4 MaverickmaxGemini 2.5 Pro✓DeepSeek-R1max
Mistral Large 2maxMax 4 models. Remove one to add another.