Google · AI model API pricing
How much does Gemini 3.1 Pro cost?
Google's frontier tier (in preview) — the cheapest input price of any flagship-class model.
Rate card
| Input tokens | $2 / 1M |
| Cached input | $0.20 / 1M |
| Output tokens | $12 / 1M |
| Context window | — |
What that means per month
| Workload | Tokens / month | Cost / month |
|---|---|---|
| Prototype | 1M in · 0.3M out | $5.60/mo |
| Small app | 10M in · 3M out | $56/mo |
| Production app | 50M in · 15M out | $280/mo |
| High volume | 200M in · 60M out | $1,120/mo |
| Heavy platform | 1B in · 300M out | $5,600/mo |
Standard on-demand rates from Google's official pricing page, last checked 2026-07-16. Rates shown are for prompts ≤200k tokens; above 200k, input doubles to $4 and output rises to $18 per 1M. Batch runs at 50%. Monthly figures exclude caching and batch discounts. Confirm live pricing before committing.
Cheaper alternatives
At a reference workload of 10M input / 3M output tokens a month, these cost less than Gemini 3.1 Pro ($56/mo):
- Gemini 3.5 Flash $42/mo
-
Grok 4.5 $38/mo -
Mistral Medium 3.5 $37.5/mo