Gemini 3.1 Pro vs GPT-5.6 Terra
Gemini 3.1 Pro and GPT-5.6 Terra charge practically the same to read a 26.2K-token pull request ($0.0524). Above 200K tokens long-context rates apply, and GPT-5.6 Terra becomes the cheaper one. Both sit in the mid-range price tier, so the choice between them is about review quality more than budget.
Side by side
| Figure | Gemini 3.1 Pro | GPT-5.6 Terra |
|---|---|---|
| Price tier | Mid-range | Mid-range |
| Bugs caughtshare of known bugs | 67% | – |
| False alarmsper clean PR | 0.8 | – |
| Cost per reviewmeasured | $0.2499 | – |
| Cost per bug caught | $0.4134 | – |
| Exact linecatches on the expected lines | 89% | – |
| Review timemean | 349s | – |
| Typical review calllist price | $0.0814 | $0.0814 |
| Input / 1M tokens | $2.00 | $2.00 |
| Output / 1M tokens | $12.00 | $12.00 |
| Context window | 1M | 1.1M |
- Above 200K tokens, long-context rates mean GPT-5.6 Terra is the cheaper of the two.
Not benchmarked yet
GPT-5.6 Terra isn't benchmarked yet, so this page compares list prices only. Measured bugs caught, false alarms and a bug-by-bug comparison appear here once both have results.
See measured models