Gemini 4 Carbon → Gemini 3.1 Pro: cost per request on six tasks
Gemini 3.1 Pro costs 1–16% more than Gemini 4 Carbon per request on six common tasks. It costs no more per result that works if its results work first time at least 2% more often than Gemini 4 Carbon's on search re-ranking, and 17% more often on translation.
List prices per million tokens
| Model | Input | Cached input | Output |
|---|---|---|---|
| Gemini 4 Carbon | $2.00 | $0.10 | $10.00 |
| Gemini 3.1 Pro | $2.00 | $0.20 | $12.00 |
Prices checked 2026-11-12.
Cost per 1,000 requests
| Task | Gemini 4 Carbon | Gemini 3.1 Pro | Change | Cheaper per result that works if it works first time at least |
|---|---|---|---|---|
| Support bot answerInstructions, three help-centre passages and the customer's question in; a short answer out. | $9.00 | $9.60 | 7% more | 7% more often than Gemini 4 Carbon |
| Invoice field extractionInstructions and one invoice's text in; about 15 fields as JSON out. | $7.50 | $8.00 | 7% more | 7% more often than Gemini 4 Carbon |
| Lead scoringScoring rules and one lead's form answers in; a score and a one-line reason out. | $3.40 | $3.60 | 6% more | 6% more often than Gemini 4 Carbon |
| Email reply draftInstructions and the email thread so far in; a reply of about 300 words out. | $7.00 | $7.80 | 11% more | 12% more often than Gemini 4 Carbon |
| TranslationInstructions and about 500 words of text in; the same text in another language out. | $9.80 | $11.40 | 16% more | 17% more often than Gemini 4 Carbon |
| Search re-rankingA search query and 20 result snippets in; the ids of the best five, in order, out. | $8.50 | $8.60 | 1% more | 2% more often than Gemini 4 Carbon |
Token counts are typical sizes, not measurements.
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