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 #6 across 566
Rank #4 across 222
Rank #319 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 | 55.0 | #6 |
| Artificial Analysis Coding Index | coding | 76.7 | #4 |
| LiveBench Mathematics | math | 94.9% | #7 |
| GPQA | reasoning | 92.5% | #12 |
| Humanity's Last Exam |
| reasoning |
| 41.8% |
| #10 |
| SciCode | coding, reasoning | 53.9% | #16 |
| Output Speed | speed | 170.1 tok/s | #55 |
| Time to First Token | speed | 172.33s | #314 |
| Blended Price | cost | $5.63/M | #319 |
| Input Price | cost | $2.50/M | #312 |
| Output Price | cost | $15.00/M | #320 |
| Value Index | cost, overall | 9.8 | #247 |