Gemini 3.1 Pro Preview Custom Tools vs Gemini Omni 1.2 Flash

Pick up to 3 models · pricing, context and capabilities · simulate your product cost

Data updated on November 14, 2026· 230 models

GoogleCustom Tools

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...

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Reasoning estimated
▲
Speed estimated
Input
Output
Context
▲1 M tokens
Max output
66 K
Input, $ per 1M tokens
$2.00
Output, $ per 1M tokens
$12.00
Cache read, $ per 1M
$0.200
Batch (input / output)
—
Tool calling
Yes
Released
02/19/2026
Knowledge cutoff
2025-01
API id
google/gemini-3.1-pro-preview-customtools
Google1.2 Flash

Gemini Omni 1.2 Flash is Google's native multimodal video generation and editing model, the successor to Gemini Omni 1.1 Flash.

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Reasoning estimated
Speed estimated
Input
Output
Context
131 K tokens
Max output
66 K
Input, $ per 1M tokens
▲$1.50
Output, $ per 1M tokens
▲$9.00
Cache read, $ per 1M
—
Batch (input / output)
—
Tool calling
No
Released
▲11/05/2026
Knowledge cutoff
—
API id
google/gemini-omni-1.2-flash
Third model (optional)
text image audio video PDF / file reasoning (1 to 5, estimated by family) speed (1 to 4, estimated by family)▲ best value among the selected

Which is the better API choice: Gemini 3.1 Pro Preview Custom Tools vs Gemini Omni 1.2 Flash?

  • Gemini Omni 1.2 Flash: cheapest input (25% less than Gemini 3.1 Pro Preview Custom Tools)
  • Gemini Omni 1.2 Flash: cheapest output
  • Gemini 3.1 Pro Preview Custom Tools: largest context (1 M)
  • Gemini Omni 1.2 Flash: the newest (11/05/2026)
  • Gemini 3.1 Pro Preview Custom Tools: most reasoning (estimated)

Gemini Omni 1.2 Flash costs 25% less on input and 25% less on output than Gemini 3.1 Pro Preview Custom Tools ($1.50 / $9.00 versus $2.00 / $12.00 per million tokens). Gemini 3.1 Pro Preview Custom Tools accepts more context (1 M). On capabilities, only Gemini 3.1 Pro Preview Custom Tools accepts audio.

What would your product cost?

Estimate the monthly cost with your app's real volume. List prices, no cache or batch discounts.

Gemini 3.1 Pro Preview Custom Tools
$78.00/mo
Gemini Omni 1.2 Flash
$58.50/mo

With Gemini Omni 1.2 Flash you save $19.50 a month versus Gemini 3.1 Pro Preview Custom Tools (25% less).

The 6 cheapest for this scenario (chat, last 12 months)

  1. 1Lyria 3 Pro Preview Google$0.00
  2. 2Lyria 3 Clip Preview Google$0.00
  3. 3Qwen3.7 Flash Qwen$0.97
  4. 4DeepSeek V4.1 Flash DeepSeek$1.57
  5. 5DeepSeek V4 Flash 0731 DeepSeek$1.85
  6. 6Ministral 3 3B 2512 Mistral$1.90

Paste your prompt: tokens and cost per model

Rough estimate (about 4 characters per token). Nothing is sent to any server.

76tokens approx.287 characters

Cost of sending it 1,000 times (input only)

  1. 1Claude Haiku 5.5 Anthropic$0.008
  2. 2Gemini Omni 1.2 Flash Google$0.114
  3. 3Gemini 3.1 Pro Preview Custom Tools Google$0.152
  4. 4Claude Sonnet 5.5 Anthropic$0.152
  5. 5Claude Opus 5.5 Anthropic$0.304
  6. 6Claude Opus 5 Anthropic$0.380
  7. 7Claude Fable 5.2 Anthropic$0.608
  8. 8Claude Fable 5.1 Anthropic$0.760

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Frequently asked questions

Which is the better API choice: Gemini 3.1 Pro Preview Custom Tools vs Gemini Omni 1.2 Flash?

Gemini Omni 1.2 Flash costs 25% less on input and 25% less on output than Gemini 3.1 Pro Preview Custom Tools ($1.50 / $9.00 versus $2.00 / $12.00 per million tokens). Gemini 3.1 Pro Preview Custom Tools accepts more context (1 M). On capabilities, only Gemini 3.1 Pro Preview Custom Tools accepts audio.

Which is cheaper: Gemini 3.1 Pro Preview Custom Tools and Gemini Omni 1.2 Flash?

Gemini Omni 1.2 Flash is cheaper: $1.50 per million input tokens and $9.00 per million output tokens, versus $2.00 / $12.00 for Gemini 3.1 Pro Preview Custom Tools.

Which has more context: Gemini 3.1 Pro Preview Custom Tools and Gemini Omni 1.2 Flash?

Gemini 3.1 Pro Preview Custom Tools accepts 1 M tokens of context; Gemini Omni 1.2 Flash accepts 131 K.

Which is newer: Gemini 3.1 Pro Preview Custom Tools and Gemini Omni 1.2 Flash?

Gemini Omni 1.2 Flash was released on 11/05/2026; Gemini 3.1 Pro Preview Custom Tools on 02/19/2026.

What would 10,000 requests a month cost with Gemini 3.1 Pro Preview Custom Tools and Gemini Omni 1.2 Flash?

With 1,500 input and 400 output tokens per request: Gemini 3.1 Pro Preview Custom Tools: $78.00; Gemini Omni 1.2 Flash: $58.50 a month, at list price.

Where do the prices come from and how often are they updated?

From the public catalogs of OpenRouter, models.dev and LiteLLM, which publish each provider's list prices. They sync once a day and the last update date is shown above the comparison.

What does price per million tokens mean?

It is what the provider charges per million tokens you send (input) or the model generates (output). A token is roughly 4 characters. Output almost always costs more than input.

Sources: OpenRouter, models.dev and LiteLLM. Prices in USD per million tokens, list price, no volume discounts. Prompt tokens are an estimate; each provider's tokenizer may differ.