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 GPT-5.6 SolOpenAI | o3 OpenAI |  DeepSeek-R1DeepSeek | |
|---|---|---|---|
| Vendor | OpenAI | OpenAI | DeepSeek |
| Family | GPT | o-series | DeepSeek |
| Release date | 2026-06-26 | 2025-04-16 | 2025-01-20 |
| Context window | — | 200,000 tokens | 128,000 tokens |
| Parameters | — | — | 671B |
| Modality | text, vision, audio | text, vision | text |
| License | proprietary | proprietary | MIT |
| Source | 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. | Reasoning-focused open-weight model. |
| Links | |||
| Benchmarks | |||
| GPQA-D | — | 87.7% | — |
| AIME-25 | — | 88.9% | 79.8% |
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GPT-5.6 Sol✓
Claude 4.8 Opus+
Qwen3.7-Max+
Gemini 3.5 Flash+Gemini 3.5+Gemini Omni+GPT-5.5+DeepSeek-V4-Flash+Gemini 3 Pro+DeepSeek-V4-Pro+Qwen3.6-27B+Claude 4.7 Opus+Claude 4.6 Sonnet+Claude 4.5 Haiku+DeepSeek-V3.1+GPT-5 Pro+GPT-5+
Grok 4+Gemini 2.5 Flash+Qwen3 235B+o3✓GPT-4.1+
Llama 4 Scout+Llama 4 Maverick+Gemini 2.5 Pro+DeepSeek-R1✓
Mistral Large 2+