GPT-5.6 Terra
by Xpersona · family gpt-terra · listed Jul 2026RTV
Balanced GPT-5.6 model for capable, cost-efficient everyday work
Current rates USD per 1M tokens
Input$1.50
Output$2.00
Cache read$0.15
Cache write—
Against the market
On the record
- Model id
gpt-5.6-terra- Context window
- 372K tokens
- Max output
- 128K tokens
- Input modalities
- text, image
- Output modalities
- text
- Reasoning
- yes
- Tool calls
- yes
- Open weights
- no
- Knowledge cutoff
- Feb 2026
- Released
- 2026-07-09
- Last updated
- 2026-07-09
- Provider docs
- www.xpersona.co/docs
Back of the envelope
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