# OpenAI: GPT-5.6 Sol Pro

Provider: openai  
Category: llm  
Model ID: `openai/gpt-5.6-sol-pro`

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.

Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode

## Specs

- Context length: 1050000 tokens
- Max output: 128000 tokens
- Modalities: file, image, text
- Released: 2026-07-09

## Pricing

- Input: $5.00 per million tokens
- Output: $30.00 per million tokens

## Verdict

GPT-5.6 Sol Pro offers a massive 1M+ token context window at mid-tier pricing, making it the go-to for document-heavy workflows where you need to process entire codebases or multi-hundred-page reports in one pass. The $30/Mtok output cost is steep for high-volume generation but reasonable for analysis-heavy tasks. Without public benchmarks yet, you're trading proven performance data for early access to OpenAI's latest context-handling architecture. Reach for this when context length is your bottleneck and you trust OpenAI's track record over published scores.

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Last verified: 2026-07-10T02:00:04.178Z  
Canonical URL: https://switchy.build/directory/models/gpt-5-6-sol-pro