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 GPT-5.6 SolOpenAI |  Gemini 3.5 Flash |  DeepSeek-V4-ProDeepSeek | |
|---|---|---|---|
| Vendor | OpenAI | DeepSeek | |
| Family | GPT | Gemini | DeepSeek |
| Release date | 2026-06-26 | 2026-05-20 | 2026-04-22 |
| Context window | — | — | 1,000,000 tokens |
| Parameters | — | — | 1.6T (49B active) |
| Modality | text, vision, audio | text, vision, audio | 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. | 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. | DeepSeek's flagship open-weight MoE. 1.6T parameters with 49B activated, 1M-token context, and a hybrid attention scheme (CSA + HCA) that delivers long-context inference at ~27% of V3.2's FLOPs. |
| Links | |||
| Benchmarks | |||
| MMLU-Pro | — | — | 84.2% |
| GPQA-D | — | — | 82.4% |
| HumanEval | — | — | 95.1% |
| Aider | — | — | 80.1% |
| AIME-25 | — | — | 88.6% |
| LiveCB | — | — | 72.4% |
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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+