| Input per 1M tokens | $1.5 |
| Output per 1M tokens | $9 |
| Cache read per 1M tokens | — |
| Status | active |
| Source | official pricing page · verified 2026-09-07 |
Example costs
- One request (2,000 in / 500 out): $0.0075
- 100K such requests/month: $750
- 1M input + 1M output tokens: $10.5
Compare against other models →
How Gemini 3.5 Flash compares on rate
Gemini 3.5 Flash runs $1.5 input / $9 output per MTok — a combined $10.5 for 1M tokens each way. The cheapest active model in our table, Gemini 2.5 Flash-Lite at $0.1/$0.4 (combined $0.5), is about 95% cheaper on combined rate (verified 2026-09-07).
Per-token rate is not per-task cost — tokenizers differ between model families, so benchmark with your own payloads before switching.
What real volumes cost at Gemini 3.5 Flash rates
Straight rate-card math at the verified $1.5/$9 per-MTok prices, assuming a 75% input / 25% output token split — no caching or batch discounts applied.
| Volume | Split | Cost at Gemini 3.5 Flash rates |
|---|---|---|
| 100K tokens in a day | 75,000 in + 25,000 out | $0.3375 |
| That pace over a 30-day month (3M tokens) | 2.25M in + 750K out | $10.12 |
| 1M tokens in a month | 750,000 in + 250,000 out | $3.38 |
| Heavy month — 12M tokens | 9M in + 3M out | $40.50 |
Change the split or volume in the calculator — same verified rates, your numbers. Method + the corrections that make estimates real: how to estimate LLM API costs.
Frequently asked questions
What does Gemini 3.5 Flash cost per million tokens?
Gemini 3.5 Flash costs $1.5 per 1M input tokens and $9 per 1M output tokens on the Google API (verified 2026-09-07).
How much does 100K tokens a day cost on Gemini 3.5 Flash?
At a 75% input / 25% output split, 100K tokens costs about $0.3375 at Gemini 3.5 Flash rates — about $10.12 over a 30-day month. That is straight rate-card math, before any caching or batch discounts.
Is there a cheaper model than Gemini 3.5 Flash?
Yes — the cheapest active model we track is Gemini 2.5 Flash-Lite at $0.1/$0.4 per MTok, a combined $0.5 against Gemini 3.5 Flash's $10.5 — about 95% less on combined rate (verified 2026-09-07). Tokenizers differ between families, so benchmark per-task cost with your own payloads.
How much do 1M input + 1M output tokens cost on Gemini 3.5 Flash?
$10.5 — $1.5 for the input million plus $9 for the output million, at Google rates verified 2026-09-07.