OpenAI
GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...
Introducing GPT-5Rank #98 across 566
Rank #75 across 222
Rank #315 across 371
Percentile score by analysis domain.
* Cost is inverted: lower input, output, and blended prices rank higher.
Higher bars mean stronger relative placement.
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 34.0 | #98 |
| Artificial Analysis Coding Index | coding | 52.3 | #75 |
| GPQA | reasoning | 74.6% | #212 |
| Humanity's Last Exam | reasoning | 11.0% | #184 |
| SciCode |
| coding, reasoning |
| 44.6% |
| #80 |
| Output Speed | speed | 101.7 tok/s | #135 |
| Time to First Token | speed | 0.63s | #70 |
| Blended Price | cost | $5.63/M | #315 |
| Input Price | cost | $2.50/M | #308 |
| Output Price | cost | $15.00/M | #316 |
| Value Index | cost, overall | 6.0 | #290 |