GPT-5.6 Sol vs GPT-5.6 Terra Codex credit cost
On a daily-coding request, GPT-5.6 Sol costs about 1.4 Codex credits ($0.06) versus 0.8 credits ($0.03) for GPT-5.6 Terra, so GPT-5.6 Sol costs about 1.8x as much. Both meter at $0.04 per credit, i.e. exact OpenAI API rates. Verified 2026-08-22.
| GPT-5.6 Sol | GPT-5.6 Terra | |
|---|---|---|
| Input, credits / 1M | 100 | 50 |
| Output, credits / 1M | 500 | 300 |
| API rate in / out, $ / 1M | $4.00 / $20.00 | $2.00 / $12.00 |
| Daily-coding request | 1.4 cr ($0.06) | 0.8 cr ($0.03) |