GPT-5.5 (batch)

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling large-scale reasoning, coding, and multimodal workflows within a single system.

ChatOpenAI1M tokens$2.7251 / $16.3509 · 1M

openai/gpt-5.5:batch

Context
1M tokens
Completion cap
128,000
Tools
Yes
JSON
Yes
Released
2026-04-24

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

Frequently asked questions

What is GPT-5.5 (batch)?
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling large-scale reasoning, coding, and multimodal workflows within a single system. GPT-5.5 (batch) runs on the Geek Hub API (OpenAI-compatible). Model id: openai/gpt-5.5:batch.
Is GPT-5.5 (batch) free?
No. Input is $2.7251 per 1M tokens and output is $16.3509 per 1M tokens on Geek Hub (markup included).
What is the context length of GPT-5.5 (batch)?
GPT-5.5 (batch) has a 1M tokens context window. It supports up to 128,000 completion tokens.
Does GPT-5.5 (batch) support tool calling and structured outputs?
GPT-5.5 (batch) 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 (batch) released?
GPT-5.5 (batch) was released on 2026-04-24.

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