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Helicone

Anthropic: Claude Sonnet 4 API

Helicone
About

Build advanced reasoning agents with Anthropic: Claude Sonnet 4, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $3.00/1M input and $15.00/1M output tokens, native tool calling support. Access Anthropic: Claude Sonnet 4 via the Helicone API with up to 64K 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
200K

Tokens

Input Limit
200K

Tokens

Max Output
64K

Tokens

Pricing

Standard (per 1M tokens)

Input
$3.00
Output
$15.00

Caching (per 1M tokens)

Read
$0.30
Write
$3.75
Frequently Asked Questions

Anthropic: Claude Sonnet 4 by Helicone costs $3.00 per 1M input tokens and $15.00 per 1M output tokens. Cached reads cost $0.30 per 1M tokens. Cache writes cost $3.75 per 1M tokens.

Model Details
ID
claude-sonnet-4
Provider
Helicone
Family
claude-sonnet
Release Date
May 14, 2025
Knowledge Cutoff
May 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