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Gemini 3.5 Flash API pricing

Low-latency Gemini model. Same 30.5 percent discount to Google's list price as Gemini 3.1 Pro.

Snapshot October 2026 · USD per million tokens · Best for: fast multimodal tasks, high-throughput apps
SayGM, in / out
$1.04 / $6.26
No top-up fee
OpenRouter, in / out
$1.58 / $9.50
Includes the 5.5% top-up fee
Provider list price
$1.50 / $9.00
Google direct
Per 100M tokens, 80/20
$208
$316 on OpenRouter

§ 01

What a month costs

The same three workloads used across the index. At every level the SayGM bill is about 34% lower.

Fig. 1Monthly bill at three usage levels, Gemini 3.5 Flash
  • OpenRouter, fee included
  • SayGM
Side project5M in · 1M out
$17
$11
Production app50M in · 15M out
$222
$146
High volume500M in · 100M out
$1,740
$1,146
Show data as a table
OpenRouter, fee includedSayGM
Side project (5M in · 1M out)$17$11
Production app (50M in · 15M out)$222$146
High volume (500M in · 100M out)$1,740$1,146
Usage is millions of input and output tokens per month. No caching discount applied. Source: published rate cards, October 2026 snapshot. Current prices on saygm.com (opens in a new tab).

§ 02

Where the money goes

Output tokens cost 6.0 times more than input on Gemini 3.5 Flash. At an 80/20 mix they make up 60% of the bill.

Fig. 2Share of the bill from output tokens at an 80/20 token mix
  • Input tokens (80% of volume)
  • Output tokens (20% of volume)
Gemini 3.1 Pro Preview
Gemini 3.5 Flash
Show data as a table
ModelShare of bill from inputShare of bill from output
Gemini 3.1 Pro Preview40%60%
Gemini 3.5 Flash40%60%
Output tokens are a fifth of the volume but most of the cost on every frontier model. Trimming output length saves more than trimming prompts. Source: published rate cards, October 2026 snapshot. Current prices on saygm.com (opens in a new tab).

§ 03

Estimate a Gemini 3.5 Flash bill

50M
10M

Monthly bill by provider

  • OpenRouter, fee included$174
  • Requesty, 5% included$173
  • Vercel AI Gateway$165
  • Google direct, list price$165
  • SayGM$115
A year, vs the cheapest alternative
$605
31% lower than Vercel AI Gateway
A year, vs OpenRouter
$713
Fee included

Uncached prices from the October 2026 snapshot. Prompt caching lowers every provider's bill; batch jobs bought direct cost half of list. Current SayGM rates are on saygm.com (opens in a new tab).

§ 04

Other Google models

USD per million tokens, input and output. OpenRouter includes its 5.5% top-up fee. Snapshot from October 2026.
ModelSayGMin / outOpenRouterin / out, fee incl.SayGM vs OpenRouter80/20 blend
Gemini 3.1 Pro PreviewGoogle$1.39 / $8.34$2.11 / $12.66
34% lower
Gemini 3.5 FlashGoogle$1.04 / $6.26$1.58 / $9.50
34% lower

§ 05

Compare and set up

Head to head

Use it in

Current SayGM rates (opens in a new tab)

§ 06

Gemini 3.5 Flash questions

How much does Gemini 3.5 Flash cost on SayGM?

As of October 2026, $1.04 per million input tokens and $6.26 per million output tokens, with no top-up fee. Prices are set per epoch and capped at list, so check saygm.com for the live rate.

Is Gemini 3.5 Flash cheaper on SayGM or OpenRouter?

SayGM is about 34 percent cheaper at an 80/20 input to output mix once OpenRouter's 5.5 percent fee is included.

Which API does SayGM use for Gemini 3.5 Flash?

The model's native API. Google features such as caching, tool use and structured output work unchanged. Any OpenAI-compatible SDK works by changing the base URL.