LLM Toolkit Model profile · Google
Gemini 3.5 Flash pricing
Gemini 3.5 Flash costs $1.50 per 1M input tokens and $9.00 per 1M output tokens, with a 1M context window. Rates verified against the official Google pricing page as of 2026-09-02.
Input
$1.50 /1M in
cached: $0.15
Output
$9.00 /1M out
6.0× the input rate
Context window
1M tokens
≈ 750,000 words
Gemini 3.5 Flash at a glance
| Input / 1M tokens | $1.50 |
| Cached input / 1M | $0.15 |
| Output / 1M tokens | $9.00 |
| Context window | 1M tokens |
| ≈ English words of context | 750,000 |
| Provider | |
| Price verified | 2026-09-02 |
Source: Google official pricing page. We re-verify every model monthly.
What Gemini 3.5 Flash costs per month
| Workload | Gemini 3.5 Flash monthly cost | Per request |
|---|---|---|
| Side-project chatbot 30K req · 2,000 in · 500 out · 40% cached | $192.60/mo | $0.0064 |
| Coding agent 500K req · 12,000 in · 1,500 out · 70% cached | $10,080/mo | $0.020 |
| Bulk extraction 2,000K req · 800 in · 120 out · 20% cached | $4,128/mo | $0.0021 |
Computed from list prices verified 2026-09-02. Cache savings blend normal and cached input rates by the hit rate. Compare against every other model at your exact volumes on the API Cost Calculator.
How much context is 1M tokens?
About 750,000 English words — roughly 1,500 pages of text — or several large codebases. Filling the entire window once costs $1.50 in input tokens at list price, before the model generates a single output token. Count your real documents with the AI Token Counter.
Frequently asked questions
How much does Gemini 3.5 Flash cost per million tokens?
Gemini 3.5 Flash costs $1.50 per 1M input tokens and $9.00 per 1M output tokens, with cached input at $0.15. Rates are verified against Google's official pricing page as of 2026-09-02.
How big is Gemini 3.5 Flash's context window?
Gemini 3.5 Flash ships a 1M token context window — roughly 750,000 English words, or about 1,500 pages of text. Filling the entire window once costs $1.50 in input tokens at list price.
Is Gemini 3.5 Flash cheap or expensive compared to other models?
Among the 22 models we track, Gemini 3.5 Flash ranks #12 on input price — cheapest is GPT-5 nano at $0.05, priciest is Claude Fable 5 at $10.00. At $1.50 per 1M input, Gemini 3.5 Flash runs 30.0× the cheapest tier. Compare it head-to-head with its rivals on the model comparison pages.
What is cached input pricing on Gemini 3.5 Flash?
Gemini 3.5 Flash charges $0.15 per 1M cached input tokens — 10% of its $1.50 base input rate. If your requests repeat context (system prompts, documents, conversation history), prompt caching cuts the input portion of your bill accordingly. Model the exact savings on the API Cost Calculator.
Compare Gemini 3.5 Flash against
More Google models
- Gemini 3.7 Flash $0.75 in · 1M
- Gemini 3.5 Flash-Lite $0.30 in · 1M
Or see all rates on the Pricing Comparison.