All Anthropic models

Claude Sonnet 4

Anthropic · released May 2025

Claude Sonnet 4 is a Anthropic model with a 200K token context window — about 290 pages of text. It reads Images, Text, and Files and replies in Text. It can show its reasoning before it answers.

$3.45

input / 1M tokens

$17.25

output / 1M tokens

200K

context — about 290 pages

3.1¢

a client proposal

Pricing

Input
$3.45 per million tokens
Output
$17.25 per million tokens
Cached input
$0.345 per million tokens
Cache writes
$4.31 per million tokens
Web search
1.1¢ per search
Long-context rate (over 200K)
$6.90 in · $25.88 out, per million tokens

Billed from your Alyph wallet. Prices can change when the provider changes theirs — last checked August 9, 2026.

The numbers

Provider
Anthropic
Released
May 2025 (2025-05-22)
Context window
200K tokens — about 290 pages
Max output
64K tokens per reply
Input
Images, Text, and Files
Output
Text
Reasoning
Shows its thinking before answering
Knowledge cutoff
2025-01-31

Cost vs Token Amount

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Claude Sonnet 4

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What a task costs

2K tokens in · 500 tokens out.

Claude Sonnet 4

Anthropic

1.6¢

for this task

44% input · 56% output

Full pricing →

Your $5 welcome credit covers about 322 of these.

Compare Claude Sonnet 4

Closest in price on a typical task:

Claude Sonnet 4 vs Claude Sonnet 4.5 →Claude Sonnet 4 vs Claude Sonnet 4.6 →Claude Sonnet 4 vs Kimi K3 →Claude Sonnet 4 vs Sonar Pro →Any other combination →

Questions, answered

How much does Claude Sonnet 4 cost on Alyph?

Claude Sonnet 4 costs $3.45 per million input tokens and $17.25 per million output tokens on Alyph. A typical task — 5K tokens in, 800 out — works out to about 3.1¢. Billed from your Alyph wallet, with hard spending limits. Prices can change when the provider changes theirs; this page was last checked on August 9, 2026.

What is Claude Sonnet 4's context window?

200K tokens — about 290 pages. Replies can be up to 64K tokens long. Prompts longer than 200K tokens are billed at the long-context rate.

Can Claude Sonnet 4 read images and files?

Claude Sonnet 4 reads Images, Text, and Files. Drop a file onto the canvas and it becomes part of the context — the only limit is the context window.

Does Claude Sonnet 4 show its reasoning?

Yes. Claude Sonnet 4 can expose its thinking before the final answer, so you can watch how it got there.

Test Claude Sonnet 4 against Claude Sonnet 4.5

One prompt, both models at the same time, the better answer wins. Free to start, with $5 of credit.

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