How much does Claude Sonnet 4 cost?

Claude Sonnet 4 costs $3 per million input tokens and $15 per million output tokens. The blended average is $9.00 per million tokens.

What is the context window of Claude Sonnet 4?

Claude Sonnet 4 supports a context window of 200K tokens (200,000 tokens) and can generate up to 16K output tokens per request.

What is Claude Sonnet 4 best for?

Claude Sonnet 4 is best for: Coding & balance. It supports chat, vision, code, function_calling capabilities.

Claude Sonnet 4 — Pricing, Benchmarks & Specs

Claude Sonnet 4

Anthropicbalanced

Anthropic's balanced model with excellent coding and reasoning. Best price-to-performance ratio.

Context Window

200K

tokens

Max Output

16K

tokens

Input Price

per 1M tokens

Output Price

$15

per 1M tokens

Speed

tokens/sec

Released

May 2025

2025-05-22

Blended Cost

$9.00

per 1M tokens

Value Score

9.8

quality per $

Capabilities

ChatVisionCode GenerationFunction Calling

Benchmarks

Quality Index

MMLU Pro

89.5

HumanEval (Coding)

93.7

MATH

81.2

Arena ELO

1320

Try in Playground Use via Swfte Connect Anthropic Docs

Compare With

Claude Opus 4

Quality: 95·$45.00/1M

About Claude Sonnet 4

Claude Sonnet 4 is a balanced AI model by Anthropic, released on May 22, 2025. It supports a context window of 200K tokens and can generate up to 16K output tokens.

At $3 per million input tokens and $15 per million output tokens, its blended cost of $9.00/1M tokens places it in the premium pricing tier. Its value score of 9.8 reflects the balance of quality and cost.

Using Claude Sonnet 4 with Swfte

Access Claude Sonnet 4 through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try Claude Sonnet 4 in our AI Playground before integrating.