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Google: Gemini 3.1 Pro Preview Custom Tools

google/gemini-3-1-pro-preview-customtools
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Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party

Modalities
In / out per 1M$2.00 / $12
Context1M
ReleasedFeb 25, 2026

Providers

1 provider serves this model upstream.

Providers serving this model
ProviderInput /MOutput /MCache read /MLatency P50Throughput P50Uptime
Google AI Studio$2.00$12$0.204.90s24 tps100%

Market-wide measurements, refreshed every 15 minutes. They describe who serves Gemini 3.1 Pro Preview Custom Tools in general, not how ProjectCOZY routes your requests.

Pricing

List rates per 1M tokens — what Gemini 3.1 Pro Preview Custom Tools costs pay-as-you-go elsewhere, not what you pay here.

Input
$2.00
per 1M tokens
Output
$12
per 1M tokens
Cache read
$0.20
per 1M cached tokens
Included in every pass
Gemini 3.1 Pro Preview Custom Tools is included in every ProjectCOZY pass at no extra cost — one flat rate, no per-token metering. The rates above are there for comparison.

Performance

Time to first token and output speed across every provider, over the last 3 days.

0.0s25.0s50.0s75.0s100.0s
Oct 11, 3 AMOct 11, 4 PMOct 12, 12 AMOct 12, 12 PMOct 12, 8 PMOct 13, 7 AMOct 13, 3 PMOct 13, 11 PMOct 14, 10 AM
Median 90th percentile 99th percentile
0 tok/s100 tok/s200 tok/s300 tok/s400 tok/s
Oct 11, 3 AMOct 11, 4 PMOct 12, 12 AMOct 12, 12 PMOct 12, 8 PMOct 13, 7 AMOct 13, 3 PMOct 13, 11 PMOct 14, 10 AM
Median 90th percentile 99th percentile

Uptime

100% of requests were served successfully over the last 3 days, across all providers.

Last 3 daysAvailability 98.96%
Oct 11, 2:00 PMNow
Availability over the last 24 hoursAvailability 99.48%
100% 93% 87% 80%
Oct 13, 2:50 PMNow

Apps

Tools that most often run Gemini 3.1 Pro Preview Custom Tools, by tokens this week.

Takt28.9% of tokens196.6MKilo CodeCli Agent · 28% of tokens190.4MClaude CodeCli Agent · 21.4% of tokens145.8MOpenClawPersonal Agent · 11.1% of tokens75.5MRoo CodeIde Extension · 10.6% of tokens72.2M

Activity

6.6B tokens processed market-wide in the last month.

0500.0M1.0B1.5B2.0B
Sep 14Sep 19Sep 24Sep 29Oct 4Oct 9Oct 14
Tokens

FAQ

Which model id do I use for Gemini 3.1 Pro Preview Custom Tools?
google/gemini-3.1-pro-preview-customtools. Send it as the model field from any OpenAI-compatible client, against http://192.168.1.55/v1.
How much context does Gemini 3.1 Pro Preview Custom Tools hold?
1,048,576 tokens per request, of which up to 65,536 can be the response.
What can it accept and return?
Input: text, audio, image, video, file. Output: text.
What does Gemini 3.1 Pro Preview Custom Tools cost on a pass?
Nothing beyond the pass itself. Pay-as-you-go elsewhere it lists at $2.00 per 1M input tokens and $12 per 1M output tokens.
Who built Gemini 3.1 Pro Preview Custom Tools?
Google, in the Gemini family.

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