GPT-5.6 Terra
GPT-5.6 Terra — OpenAI multimodal model with an Intelligence Index of 55, a 1M-token context window and a blended price of $1.14/1M tokens.
Key specifications
| Intelligence Index | 55 |
|---|---|
| Coding Index | 76.7 |
| Agentic Index | 47.4 |
| Arena Elo | — |
| Context window (K tokens) | 1,000 |
| Blended price ($/1M tokens) | 1.1 |
| Output speed (tokens/s) | 138 |
About GPT-5.6 Terra
The GPT-5.6 Terra is a multimodal model from OpenAI with an Intelligence Index of 55.0, a Coding Index of 76.7 and a 1 million-token context window. It runs at a blended price of $1.14 per million tokens and generates about 138 tokens/s. It is proprietary api. Leaderboard indices are a strong signal but only part of real-world quality, which also depends on tool use, latency and task fit.
The comparisons below show how GPT-5.6 Terra stacks up against the alternatives people most often weigh against it, with the specific numbers laid out side by side.
Frequently asked questions
Is the GPT-5.6 Terra any good?
GPT-5.6 Terra — OpenAI multimodal model with an Intelligence Index of 55, a 1M-token context window and a blended price of $1.14/1M tokens.
What are the key specs of the GPT-5.6 Terra?
See the specification table above for the full breakdown.