Bertrande

Catalogue / Google / Gemini 3.5 Flash

Gemini 3.5 Flash

Prices and limits, each value carrying the date it was observed and the source it came from.

As of 18 September 2026, Gemini 3.5 Flash costs $1.50 per million input tokens and $9.00 per million output tokens on Google. Observed on Google's own published price list on 18 September 2026.

Input $1.50 per 1M
Output $9.00 per 1M

What does Gemini 3.5 Flash cost?

ParameterValueUnit ObservedSourceProof
Input price $1.50 USD per 1M tokens 18 September 2026
checked 18 September 2026
official API L3 7ddd8ebc4058
Output price $9.00 USD per 1M tokens 18 September 2026
checked 18 September 2026
official API L3 7ddd8ebc4058
Cache read price $0.150 USD per 1M tokens 18 September 2026
checked 18 September 2026
official API L3 7ddd8ebc4058
Cache storage price $1.00 USD per 1M tokens per hour 18 September 2026
checked 18 September 2026
official API L3 7ddd8ebc4058

Does the price change with the hour or the size of the request?

Yes. This provider publishes conditional rates, so the figure above is not the only price you can pay. Each rate below applies under a stated condition, taken verbatim from the provider's own catalogue.

ParameterRate AppliesObserved
Input price $0.750 batch tier 18 September 2026
Input price $0.750 flex tier 18 September 2026
Input price $2.70 priority tier 18 September 2026
Output price $4.50 batch tier 18 September 2026
Output price $4.50 flex tier 18 September 2026
Output price $16.20 priority tier 18 September 2026
Cache read price $0.075 batch tier 18 September 2026
Cache read price $0.080 flex tier 18 September 2026
Cache read price $0.270 priority tier 18 September 2026
Cache storage price $1.00 batch tier 18 September 2026
Cache storage price $1.00 flex tier 18 September 2026
Cache storage price $1.00 priority tier 18 September 2026

We record each conditional rate as its own dated observation, so a discount window that disappears shows up as a change like any other.

How has Gemini 3.5 Flash moved?

Output price, 4 observations between 27 August 2026 and 18 September 2026. Range $9.00 to $9.00. Drawn as a step: a value holds until the next observation, we do not interpolate between them.

Has Gemini 3.5 Flash changed price?

No change has been recorded since we started observing this service on 27 August 2026. We record a change only when two successive observations differ, so an empty table here means the values have held.

What does Gemini 3.5 Flash cost elsewhere?

We track this model at 4 sellers. The same model rarely costs the same everywhere, and the difference is not visible from any single seller's catalogue.

Compare Gemini 3.5 Flash across 3 sellers, side by side, or see every model tracked at more than one seller.

Other services from Google

All Google services

Where these figures come from

Source: Google. Every figure on this page was read from Google's own published price list, and every row above links straight back to it. We publish factual values with attribution, we do not reproduce Google's content, and we send readers to them. If you publish this source and want us to stop tracking it, write to contact@bertrande.com and we will act on it without argument.

How is this page verified?

Every figure above comes from Google's own published price list, which we rank as a level 3 source. We re-check it every day. Each observation stores the exact source URL and a SHA-256 fingerprint of the source content at that moment, which is what lets us prove what the source said on a given day.

The Proof column shows the first twelve characters of the SHA-256 fingerprint of the source content at the moment we read it. Hover it for the full value. It is what lets us demonstrate later what the source said on a given day, after that page has changed or vanished. The full fingerprints are in data.json.

No value on this page was produced, estimated or completed by a language model. Where we do not have a verified figure, the row is absent rather than filled in. Read the full methodology, or report an error.

Take the data, or watch this page

This page is available as data.json (including the full observation history of every parameter) and data.csv, under CC-BY-4.0, free, with attribution. See all downloads.

Want to know when this changes? Point a feed reader or a script at the Atom feed, which carries every confirmed change and is rebuilt hourly, or poll this page's data.json, where every figure carries its observation date and the fingerprint of its source. Both work today and need no address.

Email alerts are open, and nothing is sent until you confirm from a link we email you. Subscribe, or see what an alert looks like.