GPT-5.6 Sol

Flagship of the 5.6 family. Three tiers Sol/Terra/Luna at different price-capability points.

ChatOpenAI400k tokens$5.4503 / $32.7018 · 1M

openai/gpt-5.6-sol

Context
400k tokens
Completion cap
128,000
Tools
Yes
JSON
Yes
Released
2026-07-09
ZDR
Verified

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",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is GPT-5.6 Sol?
Flagship of the 5.6 family. Three tiers Sol/Terra/Luna at different price-capability points. GPT-5.6 Sol runs on the Geek Hub API (OpenAI-compatible). Model id: openai/gpt-5.6-sol.
Is GPT-5.6 Sol free?
No. Input is $5.4503 per 1M tokens and output is $32.7018 per 1M tokens on Geek Hub (markup included).
What is the context length of GPT-5.6 Sol?
GPT-5.6 Sol has a 400k tokens context window. It supports up to 128,000 completion tokens.
Does GPT-5.6 Sol support tool calling and structured outputs?
GPT-5.6 Sol 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 released?
GPT-5.6 Sol was released on 2026-07-09.

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