GPT-5.6 Sol Pro

GPT-5.6 Sol Pro is the same underlying model as 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

ChatOpenAI1M tokens$2.1801 / $10.9006 · 1M

openai/gpt-5.6-sol-pro

Context
1M tokens
Completion cap
128,000
Tools
Yes
JSON
Yes
Released
2026-07-09

Call it from Geek Hub

Same OpenAI SDK. Change the base URL and the model id.

curl https://api.geekhub.mx/v1/chat/completions \
  -H "Authorization: Bearer $GEEKHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.6-sol-pro",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is GPT-5.6 Sol Pro?
GPT-5.6 Sol Pro is the same underlying model as 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 GPT-5.6 Sol Pro runs on the Geek Hub API (OpenAI-compatible). Model id: openai/gpt-5.6-sol-pro.
Is GPT-5.6 Sol Pro free?
No. Input is $2.1801 per 1M tokens and output is $10.9006 per 1M tokens on Geek Hub (markup included).
What is the context length of GPT-5.6 Sol Pro?
GPT-5.6 Sol Pro has a 1M tokens context window. It supports up to 128,000 completion tokens.
Does GPT-5.6 Sol Pro support tool calling and structured outputs?
GPT-5.6 Sol Pro accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
When was GPT-5.6 Sol Pro released?
GPT-5.6 Sol Pro was released on 2026-07-09.

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