GPT-5.6 Terra (batch)

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic tasks where capability and cost need to be balanced, offering strong performance at roughly half the cost of Sol.

ChatOpenAI1M tokens$1.0901 / $6.5404 · 1M

openai/gpt-5.6-terra: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-terra:batch",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is GPT-5.6 Terra (batch)?
GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic tasks where capability and cost need to be balanced, offering strong performance at roughly half the cost of Sol. GPT-5.6 Terra (batch) runs on the Geek Hub API (OpenAI-compatible). Model id: openai/gpt-5.6-terra:batch.
Is GPT-5.6 Terra (batch) free?
No. Input is $1.0901 per 1M tokens and output is $6.5404 per 1M tokens on Geek Hub (markup included).
What is the context length of GPT-5.6 Terra (batch)?
GPT-5.6 Terra (batch) has a 1M tokens context window. It supports up to 128,000 completion tokens.
Does GPT-5.6 Terra (batch) support tool calling and structured outputs?
GPT-5.6 Terra (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 Terra (batch) released?
GPT-5.6 Terra (batch) was released on 2026-07-09.

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