How much does Claude Sonnet 4.5 cost per token?

Claude Sonnet 4.5 is priced at $3.00 per million input tokens and $15.00 per million output tokens, per OpenRouter as of Jul 8, 2026.

What is Claude Sonnet 4.5's context window?

Claude Sonnet 4.5 supports a context window of up to 1M tokens, per Anthropic.

How good is Claude Sonnet 4.5 at coding?

Claude Sonnet 4.5 scores 74.8% on SWE-bench Verified (Nov 3, 2025). Its full benchmark table is above.

What are the alternatives to Claude Sonnet 4.5?

By OpenRouter usage, comparable models include Hy3, DeepSeek V4 Flash, and MiniMax M3. Side-by-side comparisons are linked in the alternatives table.

ModelsAnthropic

Claude Sonnet 4.5

Name: Claude Sonnet 4.5
Author: Anthropic

openrouter price docs

Context

tokens

Released

Sep 29, 2025

on OpenRouter

Token share

0.2%

OpenRouter · Jul 2, 2026

Pricing

Price per million tokens

Input $/MTok

$3.00

OpenRouter · Jul 8, 2026

Output $/MTok

$15.00

OpenRouter · Jul 8, 2026

Cache read $/MTok

$0.3

OpenRouter

Cache write $/MTok

$3.75

OpenRouter

Current Claude Sonnet 4.5 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-4.5	$3.00	$15.00	$0.3	$3.75	1M	Jul 8, 2026	—
models.dev	cortecs/claude-4-5-sonnet	$3.26	$16.30	—	—	200K	Jul 8, 2026	8.6%

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

2 sources tracking

Input $/MTok

Output $/MTok

per-source step lines · $/MTok

history since Jul 8, 2026

Specs

Context & availability

Claude Sonnet 4.5 specifications.
Provider	Anthropic
Context window	1M tokens
Listed on OpenRouter	Sep 29, 2025
Tracked price sources	OpenRouter · models.dev
OpenRouter slugs	anthropic/claude-sonnet-4.5 · anthropic/claude-4.5-sonnet-20250929

source: OpenRouter model catalog + tracked price feeds

id: claude-sonnet-4-5

Usage

Share of OpenRouter tokens

90-day · to Jul 2, 2026

source: OpenRouter model rankings · share of tracked coding-token volume

0.2% on Jul 2, 2026

Benchmarks

Benchmark results

Benchmark scores for Claude Sonnet 4.5.
Benchmark	Configuration	Score	Date	Source
SWE-bench Verified	sonar foundation agent claude sonnet 4 5	74.8%	Nov 3, 2025	swebench-experiments
AA Intelligence Index	anthropic/claude-sonnet-4.5	36.4index	—	or-embedded-aa
AA Coding Index	anthropic/claude-sonnet-4.5	52.1index	—	or-embedded-aa
AA Agentic Index	anthropic/claude-sonnet-4.5	24.6index	—	or-embedded-aa

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

Similar models

Alternatives to Claude Sonnet 4.5 by OpenRouter usage-rank proximity.
#	Model	Tokens/day	7d Δ	Head-to-head
1	Hy3Tencent	857.5B	—	vs Claude Sonnet 4.5
2	DeepSeek V4 FlashDeepSeek	806.2B	6.6%	vs Claude Sonnet 4.5
3	MiniMax M3MiniMax	665.9B	9.8%	vs Claude Sonnet 4.5
5	DeepSeek V4 ProDeepSeek	530.6B	50.5%	vs Claude Sonnet 4.5

ranked by OpenRouter usage-rank proximity

snapshot Jul 7, 2026

FAQ

Claude Sonnet 4.5 FAQ

How much does Claude Sonnet 4.5 cost per token?: Claude Sonnet 4.5 is priced at $3.00 per million input tokens and $15.00 per million output tokens, per OpenRouter as of Jul 8, 2026.
What is Claude Sonnet 4.5's context window?: Claude Sonnet 4.5 supports a context window of up to 1M tokens, per Anthropic.
How good is Claude Sonnet 4.5 at coding?: Claude Sonnet 4.5 scores 74.8% on SWE-bench Verified (Nov 3, 2025). Its full benchmark table is above.
What are the alternatives to Claude Sonnet 4.5?: By OpenRouter usage, comparable models include Hy3, DeepSeek V4 Flash, and MiniMax M3. Side-by-side comparisons are linked in the alternatives table.

Alerts

Track Claude Sonnet 4.5

Email me when Claude Sonnet 4.5's price moves or it gets deprecated.