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Helicone

Google Gemini 2.5 Pro API

Helicone
About

Build advanced reasoning agents with Google Gemini 2.5 Pro, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $1.25/1M input and $10.00/1M output tokens, native tool calling support. Access Google Gemini 2.5 Pro via the Helicone API with up to 66K output tokens.

Capabilities

Input Modalities

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Output Modalities

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Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
1.0M

Tokens

Input Limit
1.0M

Tokens

Max Output
66K

Tokens

Pricing

Standard (per 1M tokens)

Input
$1.25
Output
$10.00

Caching (per 1M tokens)

Read
$0.31
Write
$1.25
Frequently Asked Questions

Google Gemini 2.5 Pro by Helicone costs $1.25 per 1M input tokens and $10.00 per 1M output tokens. Cached reads cost $0.31 per 1M tokens. Cache writes cost $1.25 per 1M tokens.

Model Details
ID
gemini-2.5-pro
Provider
Helicone
Family
gemini-pro
Release Date
Jun 17, 2025
Knowledge Cutoff
Jun 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
HELICONE_API_KEY
API Base URL
https://ai-gateway.helicone.ai/v1
Documentation