gemini-3.1-pro-preview-customtools

Gemini 3.1 Pro Preview Custom Tools — priced by Google.

Jurisdiction US
Context window 1,048,576 tokens
Provider Google
Tiers priced 3

3 of this model’s published tiers no longer come from the vendor. The provider stopped publishing those keys and we did not stop publishing a value for them, so the next source down the trust order supplies the number: it is real and it is sourced, but it is not the provider’s own rate and the provider may no longer sell at it. Each one is marked in the table. See source handovers.

Published tiers

What the most recent complete run published for this model, one row per priced tier, each with the source it was read from.

Tier	Input USD/1M	Output USD/1M	Last read	Read from	Flags
cache_hit	0.2	n/a, not applicable: this tier prices input tokens only and has no output side	just now	OpenRouter models API	no longer the vendor’ssingle source
cache_write	0.375	n/a, not applicable: this tier prices input tokens only and has no output side	just now	OpenRouter models API	no longer the vendor’ssingle source
flat	2	12	just now	OpenRouter models API	no longer the vendor’ssingle source

This model on the price scale0.2 to 12 across 4 published values

The same six decades as the front page, so a price is in the same place here as it is anywhere else on this site. The two marks in the accent colour are this model’s cheapest and dearest published values.

Price history

Every distinct value this price has taken, oldest first — what the price did, not how often we happened to look. Rows marked backfill came from a public git history of a third-party pricing file and were never verified by us; they extend the series backwards and are flagged rather than hidden.

cache_hit

1 distinct value

One value across the whole archive: this price has not moved in anything we have observed.

Held steady240 days — the value published now has been observed to hold for 240 days, which is 100% of the longest run on this page.

Input 0.2
Output n/a, not applicable: this tier prices input tokens only and has no output side
First seen 2026-02-19 16:44Z
Last seen 2026-10-17 12:00Z
Reads 76
Last read 2026-10-17 12:00Z
Source OpenRouter models API

cache_write

3 distinct values

Held steady62 days — the value published now has been observed to hold for 62 days, which is 26% of the longest run on this page.

inputoutput1 window nobody looked inhorizontal axis is time

Input low 0.375 · high 4.5
Observed 2026-08-15 23:13Zto 2026-08-16 13:59Z

First seen	Last seen	Input USD/1M	Output USD/1M	Reads	Source	Last read	Flags
2026-08-15 23:13Z	2026-08-16 13:50Z	0.375	n/a, not applicable: this tier prices input tokens only and has no output side	11	OpenRouter models API	2026-08-16 13:50Z
2026-08-16 13:55Z	2026-08-16 13:55Z	4.5	n/a, not applicable: this tier prices input tokens only and has no output side	1	Gemini API pricing (docs)	2026-08-16 13:55Z	unconfirmed
2026-08-16 13:59Z	2026-10-17 12:00Z	0.375	n/a, not applicable: this tier prices input tokens only and has no output side	61	OpenRouter models API	2026-10-17 12:00Z

flat

1 distinct value

One value across the whole archive: this price has not moved in anything we have observed.

Held steady240 days — the value published now has been observed to hold for 240 days, which is 100% of the longest run on this page.

Input 2
Output 12
First seen 2026-02-19 16:44Z
Last seen 2026-10-17 12:00Z
Reads 76
Last read 2026-10-17 12:00Z
Source OpenRouter models API

Provenance

Read by openrouter_json from OpenRouter models API. Each row above links to the exact page its number came from. The vendor's page is authoritative: if it and this page disagree, the vendor is right and we are wrong.