GPT-5.6 Terra

GPT-5.6 Terra is an OpenAI model with a 1M-token context window. It reads images and lets you choose how hard it thinks.

Facts

Context window
1M tokens
Input
Text and images
Thinking effort
Adjustable, up to Extra high
Speed
Not measured yet
Available on
All plans
Intelligence rank at Vani
#18

Based on data from Artificial Analysis (artificialanalysis.ai). The ranking is Vani's ordering of the models it offers and is not endorsed by Artificial Analysis. Source

Compare with

  • OpenAI
    GPT-5.6 Luna

    GPT-5.6 Luna is an OpenAI model with a 1M-token context window. It reads images and lets you choose how hard it thinks.

    Compare side by side
  • Z.AI
    GLM-5.3

    GLM-5.3 is a Z.AI model with a 1M-token context window. It reads images and lets you choose how hard it thinks.

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  • Anthropic
    Claude Haiku 4.5

    Claude Haiku 4.5 is an Anthropic model with a 200K-token context window. It reads images and lets you choose how hard it thinks.

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For developers

Use this model on the Vani API with the OpenAI- or Anthropic-compatible endpoints. Prepaid API prices per 1M tokens:

Model id
openai/gpt-5.6-terra
Input
$1.40
Output
$8.40
Cached input
$0.14

API docsAll API prices

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