OpenAI: GPT-5.6 Sol Proopenai
Bottom Line
OpenAI: GPT-5.6 Sol Pro: $4.00/1M input, $20.00/1M output, 1.1M context. GPT-5.6 Sol Pro is the same underlying model as [GPT-5.6 Sol](https://openrouter.ai/openai/gpt-5.6-sol), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...
API Pricing (per 1M tokens)
| Input | $4.00 |
| Output | $20.00 |
| Cache Read | — |
| Cache Write | — |
| Blended (3:1) | $8.00 |
Specs & Performance
| Context Length | 1.1M |
| Max Output | 128K |
| Intelligence | — |
| Coding | — |
| Math | — |
| Speed | — |
| TTFT | — |
| CPS Grade | — |
| Input / Output Modalities | file, image, text → text |
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FAQ
How much does the OpenAI: GPT-5.6 Sol Pro API cost?
OpenAI: GPT-5.6 Sol Pro costs $4.00/1M input tokens and $20.00/1M output tokens. Blended cost at a 3:1 ratio is about $8.00/1M tokens.
What is the context window of OpenAI: GPT-5.6 Sol Pro?
OpenAI: GPT-5.6 Sol Pro supports a 1.1M token context window with up to 128K output tokens.
Is OpenAI: GPT-5.6 Sol Pro worth it?
OpenAI: GPT-5.6 Sol Pro has a CPS grade of — (score —), intelligence index —, coding index —. Use the compare page to benchmark against rivals.