GPT-5.6 Sol vs GPT-5.6 Terra Codex credit cost
On a daily-coding request, GPT-5.6 Sol costs about 2 Codex credits ($0.08) versus 1 credits ($0.04) for GPT-5.6 Terra, so GPT-5.6 Sol costs about 2x as much. Both meter at $0.04 per credit, i.e. exact OpenAI API rates. Verified 2026-07-21.
| GPT-5.6 Sol | GPT-5.6 Terra | |
|---|---|---|
| Input, credits / 1M | 125 | 62.5 |
| Output, credits / 1M | 750 | 375 |
| API rate in / out, $ / 1M | $5.00 / $30.00 | $2.50 / $15.00 |
| Daily-coding request | 2 cr ($0.08) | 1 cr ($0.04) |