GPT-5.6 Luna (batch)

GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for its price tier.

ChatOpenAI1M tokens$0.109 / $0.654 · 1M

openai/gpt-5.6-luna:batch

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

Frequently asked questions

What is GPT-5.6 Luna (batch)?
GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for its price tier. GPT-5.6 Luna (batch) runs on the Geek Hub API (OpenAI-compatible). Model id: openai/gpt-5.6-luna:batch.
Is GPT-5.6 Luna (batch) free?
No. Input is $0.109 per 1M tokens and output is $0.654 per 1M tokens on Geek Hub (markup included).
What is the context length of GPT-5.6 Luna (batch)?
GPT-5.6 Luna (batch) has a 1M tokens context window. It supports up to 128,000 completion tokens.
Does GPT-5.6 Luna (batch) support tool calling and structured outputs?
GPT-5.6 Luna (batch) accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
When was GPT-5.6 Luna (batch) released?
GPT-5.6 Luna (batch) was released on 2026-07-09.

More models from OpenAI