Tool-Orchestration Tier

Gemini 3.1 Pro Preview Custom Tools

A tool-focused pro profile for agent workflows that depend on reliable function and tool selection behavior.

Use Gemini 3.1 Pro Preview Custom Tools in your company

Data checked: 2026-03-15

Context Window

1,048,576

Input / 1M

$2.00

Output / 1M

$12.00

Model Positioning

Gemini 3.1 Pro Preview Custom Tools is positioned to improve tool selection reliability in agentic workflows.

Optimized for structured tool-calling behavior.
High context and multimodal coverage for complex orchestration.
Useful for agent pipelines with strict action semantics.
Requires thorough workflow testing before broad production use.

Key Specs

Model ID: google/gemini-3.1-pro-preview-customtools
Context Window: 1,048,576 tokens
Modality: text+image+file+audio+video->text
Input Price: $2.00 per 1M tokens
Output Price: $12.00 per 1M tokens
Provider: Google
Listing Date: 2026-02-25

Strengths

Better fit for tool-heavy agent execution paths.
Supports rich input modalities for complex pipelines.
Strong option for orchestrated enterprise automation.
Helps reduce misfires in tool selection scenarios.

Tradeoffs

Preview status can require tighter change management.
Higher cost than flash-like throughput tiers.
Not necessary for non-agent conversational tasks.
Needs robust observability around tool outcomes.

High-Fit Use Cases

Agent workflows with deterministic tool execution needs.
Multi-step business process automation with tool chains.
Enterprise copilots invoking internal APIs safely.
Document-plus-tool reasoning for operations teams.

Deployment Checklist

Validate tool selection behavior on real workflows.
Define explicit failure and retry handling policies.
Log tool invocation outcomes for audit review.
Set budget thresholds for high-volume agent traffic.
Maintain fallback path for degraded tool routing.

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Safe AI Use Case Selector

Choose your team and goals, then start with the AI use cases that fit best and carry the least risk.

You get

Recommended first use cases for your company.

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Parameter Guidance

response_format

Use strict schemas for tool call arguments and action payloads.

structured_outputs

Required for stable orchestration in enterprise automation.

temperature

Keep low for deterministic tool invocation behavior.

max_tokens

Cap outputs to prevent runaway chains in agent loops.

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AI Risk Test

Test what can go wrong before teams start using AI loosely across the company.

You get

A short risk summary with the main gaps to close.

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Knowledge Hub

Gemini 3.1 Pro Preview Custom Tools FAQs

It is optimized for more reliable tool-selection behavior in agentic workflows.

Usually no. Its main value is in tool orchestration rather than plain conversation.

Monitor tool call success rates, incorrect invocations, and cost per completed automation.

Deploy This Model With Governance

Use policy controls, role-based access, and budget guardrails before enabling advanced model tiers at scale.

Use Gemini 3.1 Pro Preview Custom Tools in your company