THE TICKER · GOOGLE · CHECKED DAILY · LAST CHANGE 2026-09-06
GEMINI 3.1 PRO API PRICING
What Google charges for Gemini 3.1 Pro, in USD, cross-checked daily against the public pricing dataset. Effective price — if there's a promo running, this is the promo.
Google states it plainly: "prompts > 200k tokens" is a single price for the whole request, not a blend of the two rates. The scenarios below stay under the line; a large-codebase agent run often doesn't.
WHAT THINGS ACTUALLY COST ON GEMINI 3.1 PRO
| Scenario | Tokens in / out | 1 run | 1,000 runs |
|---|---|---|---|
| A typical prompt (300 tokens in) | 300 / ~900 | $0.01 | $11.40 |
| A 20-turn conversation (context re-sent) | 4,000 / ~4,000 | $0.06 | $56.00 |
| Summarizing a 10-page document | 8,000 / ~3,200 | $0.05 | $54.40 |
| One agent run (tools, retries, thinking) | 2,000 / ~12,000 | $0.15 | $148.00 |
| A code review request | 1,500 / ~3,750 | $0.05 | $48.00 |
Output sizes assume the same editorial ratios as the Burn Calculator (3x for prompts, 6x for agent runs). Estimates, not invoices.
VS. THE REST OF THE BOARD
“Same job” = a 1,000-token prompt with a 3,000-token reply, priced on both models. Cheaper is not always better. It is, however, always cheaper.
Source: ai.google.dev/pricing · price last confirmed against the daily source on 2026-09-06. The full changelog lives at /pricing/changes.
NOW FIND OUT HOW MUCH OF THAT IS WASTE
Gemini 3.1 Pro's price is fixed. Your token count isn't. Paste a real prompt into the Burn Calculator and see what it costs on Gemini 3.1 Pro — and how much a leaner version would save at 1,000 runs. Or pull the whole board from the ticker.