GPT-6.1 Terra vs GPT-6.1 Sol
GPT-6.1 Terra is the cheaper option on input by 50%; GPT-6.1 Terra is cheaper on output by 50%. Figures below are per million tokens, from vendor pricing cited in our reporting.
| GPT-6.1 Terra | GPT-6.1 Sol | |
|---|---|---|
| Input per 1M tokens | $1 | $2 |
| Output per 1M tokens | $5 | $10 |
| Cached input per 1M | $0.05 | $0.10 |
| Context window | — | — |
| Parameters | — | — |
| Licence | proprietary | proprietary |
| Benchmark | — | — |
| Vendor | OpenAI | OpenAI |
| Released | 26 Oct 2026 | 29 Sept 2026 |
What the numbers say
- Input price gap: 50% ($1 vs $2).
- Blended three-to-one input/output rate: $8.00 for GPT-6.1 Terra, $16.00 for GPT-6.1 Sol.
- Context: — against —.
- Licence: GPT-6.1 Terra is proprietary; GPT-6.1 Sol is proprietary.