The short answer
Google Gemini API is billed per token. It has a free tier: Free tier on Flash models: ~1,500 req/day, 250k TPM (Pro models paid-only since Apr 2026). The paid plans we list start at $1.25 / $10.00 in/out per 1M (Gemini 2.5 Pro).
Plans and prices
| Plan | Price | What it covers |
|---|---|---|
| Free tier (AI Studio) | $0 | Free access to Gemini models via Google AI Studio with rate/quota limits; data may be used to improve products. |
| Gemini 2.5 Flash-Lite | $0.10 / $1.50 in/out per 1M | Lowest-cost tier; output $0.40 on the Developer API. Batch halves it to $0.05/$0.20. |
| Gemini 2.5 Flash | $0.30 / $2.50 in/out per 1M | Cost-efficient workhorse with 1M context; Batch $0.15/$1.25; caching $0.03 per 1M + $1.00/hr storage. |
| Gemini 2.5 Pro | $1.25 / $10.00 in/out per 1M | High-reasoning tier; rises to $2.50/$15.00 for prompts over 200K tokens. Batch $0.625/$5.00. |
| Grounding / tools add-on | $35 per 1,000 prompts | Google Search grounding after free tier; Maps grounding $25 per 1,000 prompts. |
How Google Gemini API bills you
The pricing model is per token. Long-context multimodal models with the most usable real free tier via AI Studio, backed by Google Cloud scale. Best suited to: multimodal, long-context, gcp-backed.
What to watch for on the bill
- Restrictive quotas/rate limits on free and lower paid tiers cause friction
- Intelligence Index sits mid-pack rather than top-of-class vs. similarly-priced reasoning models
- Free-tier inputs may be used to improve Google products, a data-privacy concern for some teams
The pricing page we read

Source: https://ai.google.dev/gemini-api/docs/pricing. Prices change, so confirm there before you commit.
Compare Google Gemini API with alternatives
- OpenAI API vs Google Gemini API pricing
- Anthropic Claude API vs Google Gemini API pricing
- Google Gemini API vs Mistral La Plateforme pricing
Other llm apis: OpenAI API, Anthropic Claude API, Mistral La Plateforme, xAI Grok API, Groq.
Looking at quality rather than price? See the Google Gemini API score on APIbenchmarks. Full entry: Google Gemini API pricing.