Modelsgpt-5.6-terra

OpenAI: GPT-5.6 Terra

gpt-5.6-terra

GPT-5.6 model that balances intelligence and cost. Terra sits between flagship Sol and cost-efficient Luna—suited for everyday coding, reasoning, and professional work (the previous mini-class tier). 1.05M context window; reasoning effort from none to max.

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Capabilities & limits

Model type: Vision Language
Input modalities
Output modalities
Context: 1,050,000tokens
Max output: 128,000tokens
Vision / images: Yes
Tools & function calling: Yes

Updated Jul 9, 2026

Pricing

Pay as you go. Rates depend on the provider route you use; below is reference pricing when available.

Input tokens

Up to 272K
- Input tokens
  Input tokens minus Cache hit tokens, Cache creation tokens, then billed
  $2 / per 1M tokens
- Cache hit tokens
  $0.2 / per 1M tokens
- Cache creation tokens
  $2.5 / per 1M tokens
- Output tokens
  $12 / per 1M tokens
272K or more
- Input tokens
  Input tokens minus Cache hit tokens, Cache creation tokens, then billed
  $4 / per 1M tokens
- Cache hit tokens
  $0.4 / per 1M tokens
- Cache creation tokens
  $5 / per 1M tokens
- Output tokens
  $18 / per 1M tokens

One scenario is selected per request; prices from different rows are not added together. Within the selected scenario, the listed meter charges are added together. For adjusted meters, the named sub-meters are deducted before applying the rate.