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 #26 across 566
Rank #32 across 222
Rank #314 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 | 49.0 | #26 |
| Artificial Analysis Coding Index | coding | 67.1 | #32 |
| GPQA | reasoning | 89.6% | #36 |
| Humanity's Last Exam | reasoning | 36.7% | #27 |
| SciCode |
| coding, reasoning |
| 50.1% |
| #37 |
| Output Speed | speed | 109.5 tok/s | #125 |
| Time to First Token | speed | 2.94s | #239 |
| Blended Price | cost | $5.63/M | #314 |
| Input Price | cost | $2.50/M | #307 |
| Output Price | cost | $15.00/M | #315 |
| Value Index | cost, overall | 8.7 | #259 |