GPT-5.5

5.5 generation with caching. 272k context. Same price tier as 5.6 Sol.

ChatOpenAI272k tokens$5.4503 / $32.7018 · 1M

openai/gpt-5.5

Context
272k tokens
Completion cap
128,000
Tools
Yes
JSON
Yes
Released
2026-04-24
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-5.5",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is GPT-5.5?
5.5 generation with caching. 272k context. Same price tier as 5.6 Sol. GPT-5.5 runs on the Geek Hub API (OpenAI-compatible). Model id: openai/gpt-5.5.
Is GPT-5.5 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-5.5?
GPT-5.5 has a 272k tokens context window. It supports up to 128,000 completion tokens.
Does GPT-5.5 support tool calling and structured outputs?
GPT-5.5 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
When was GPT-5.5 released?
GPT-5.5 was released on 2026-04-24.

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