How much does Claude Sonnet 4 cost per token?

Claude Sonnet 4 is priced at $3.00 per million input tokens and $15.00 per million output tokens, per OpenRouter as of Aug 15, 2026.

What is Claude Sonnet 4's context window?

Claude Sonnet 4 supports a context window of up to 1M tokens, per Anthropic.

What are the alternatives to Claude Sonnet 4?

By OpenRouter usage, comparable models include DeepSeek V4 Flash, Hy3, and Nemotron 3 Ultra. Side-by-side comparisons are linked in the alternatives table.

ModelsAnthropic

Claude Sonnet 4

Name: Claude Sonnet 4
Author: Anthropic

openrouter price docs

Context

tokens

Released

May 22, 2025

on OpenRouter

Pricing

Price per million tokens

Input $/MTok

$3.00

OpenRouter · Aug 15, 2026

Output $/MTok

$15.00

OpenRouter · Aug 15, 2026

Cache read $/MTok

$0.3

OpenRouter

Cache write $/MTok

$3.75

OpenRouter

Current Claude Sonnet 4 prices per million tokens across tracked sources.
Source	Tracked slug	In $/MTok	Out $/MTok	Cache read	Cache write	Context	Effective	Last Δ (in)
OpenRouter	anthropic/claude-sonnet-4	$3.00	$15.00	$0.3	$3.75	1M	Aug 15, 2026	—
models.dev	opencode/claude-sonnet-4	$3.00	$15.00	$0.3	$3.75	1M	Aug 15, 2026	11.1%
llm-prices.com	claude-sonnet-4.5-200k	$6.00	$22.50	—	—	—	Aug 14, 2026	100%

latest tracked price per source · Δ = most recent input-price move within that source

3 sources tracking

Input $/MTok

Output $/MTok

per-source step lines · $/MTok

history since Jan 1, 2023

Specs

Context & availability

Claude Sonnet 4 specifications.
Provider	Anthropic
Context window	1M tokens
Listed on OpenRouter	May 22, 2025
Tracked price sources	llm-prices.com · OpenRouter · models.dev
OpenRouter slugs	anthropic/claude-sonnet-4 · anthropic/claude-4-sonnet-20250522

source: OpenRouter model catalog + tracked price feeds

id: claude-sonnet-4

Usage

Share of OpenRouter tokens

90-day daily

usage share pending — this model isn't in the tracked OpenRouter model rankings yet

Benchmarks

Benchmark results

Benchmark scores for Claude Sonnet 4.
Benchmark	Configuration	Score	Date	Source
Aider Polyglot	claude-sonnet-4-20250514 (no thinking)	56.4%	May 24, 2025	aider-repo
Aider Polyglot	claude-sonnet-4-20250514 (32k thinking)	61.3%	May 24, 2025	aider-repo
AA Agentic Index	anthropic/claude-sonnet-4	16.6index	—	or-embedded-aa
AA Coding Index	anthropic/claude-sonnet-4	37.6index	—	or-embedded-aa
AA Intelligence Index	anthropic/claude-sonnet-4	28.9index	—	or-embedded-aa

scores as published by each benchmark; configurations differ — compare within a row's benchmark only

Similar models

Alternatives to Claude Sonnet 4 by OpenRouter usage-rank proximity.
#	Model	Tokens/day	7d Δ	Head-to-head
1	DeepSeek V4 FlashDeepSeek	2.7T	18.7%	vs Claude Sonnet 4
2	Hy3Tencent	1.3T	11.6%	vs Claude Sonnet 4
5	Nemotron 3 UltraNVIDIA	733B	106.3%	vs Claude Sonnet 4
7	GLM 5.2Z.ai	533B	41%	vs Claude Sonnet 4

ranked by OpenRouter usage-rank proximity

snapshot Aug 20, 2026

FAQ

Claude Sonnet 4 FAQ

How much does Claude Sonnet 4 cost per token?: Claude Sonnet 4 is priced at $3.00 per million input tokens and $15.00 per million output tokens, per OpenRouter as of Aug 15, 2026.
What is Claude Sonnet 4's context window?: Claude Sonnet 4 supports a context window of up to 1M tokens, per Anthropic.
What are the alternatives to Claude Sonnet 4?: By OpenRouter usage, comparable models include DeepSeek V4 Flash, Hy3, and Nemotron 3 Ultra. Side-by-side comparisons are linked in the alternatives table.

Alerts

Track Claude Sonnet 4

Email me when Claude Sonnet 4's price moves or it gets deprecated.