Model comparison
GPT-5.6 Terra Pro vs o3
Capability radar, value bars, and side-by-side posture.
GPT-5.6 Terra Pro
Not scored
value score
o3
93
value score
GPT-5.6 Terra Pro ctx
—
o3 ctx
200K
Capability radar
Value · context · multimodal · openness · speed posture
Value head-to-head
- o393
Attribute tape
| Field | GPT-5.6 Terra Pro | o3 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context | — | 200K |
| Modalities | Text, Code | |
| Openness | — | Proprietary Model |
| Speed | — | — |
| Price | — | $10/1M in · $40/1M out |
| Value score | — | 93 |
| Summary | GPT-5.6 Terra Pro is OpenAI's mid-tier GPT-5.6 model served with a higher-effort 'pro' reasoning mode, offering the same Terra checkpoint with more compute applied per request for improved answer quality on complex tasks. It supports a 1.05M-token context window, image inputs, and function calling, and is positioned between the economical Luna and flagship Sol tiers. | OpenAI reasoning model focused on hard problems. |