Claude 4 Opus vs Claude 4 Sonnet

API pricing, context window and capabilities for Claude 4 Opus and Claude 4 Sonnet, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.

Verdict

computed from the published numbers

Claude 4 Sonnet wins on price. Benchmark data is unavailable for one or both models.

Price

Claude 4 Sonnet

Coding

Not called

Intelligence

Tied

Context window

Tied

Key takeaways

who wins on what, from the published numbers

Claude 4 Opus wins

Has reasoning mode

Claude 4 Sonnet wins

Cheaper input ($5.00 vs $3.00 /1M)
Cheaper output ($25.00 vs $15.00 /1M)
More serving providers (3 vs 4)

Cheaper overall

Claude 4 Sonnet

$3.00 + $15.00 /1M

Larger context

Tied

More providers

Claude 4 Sonnet

4 providers

Pricing & specs

cheapest serving route · per 1M tokens

	Claude 4 Opus	Claude 4 Sonnet
Input $/1M	$5.00	$3.00 best
Output $/1M	$25.00	$15.00 best
Context window	200K	200K
Max output	200K	200K
Serving providers	3	4 best
Released	n/a	n/a

Benchmarks

Artificial Analysis indices, side by side

	Claude 4 Opus	Claude 4 Sonnet
Intelligence	25.5	25.5
Coding	Not available	37.6
GPQA Diamond	70% best	68%

Cost calculator

choose a serving route for each side

Claude 4 Opus · route

Claude 4 Sonnet · route

Input tokens / month

Output tokens / month

Claude 4 Opus

via Snowflake

$50

Claude 4 Sonnet

via Replicate

$30

Capabilities

feature support, side by side

Feature	Claude 4 Opus	Claude 4 Sonnet
Vision	✓	✓
Tool use	✓	✓
Reasoning	✓	—
Audio	—	—
Prompt caching	✓	✓
Structured output	✓	✓
Web search	—	—

Related comparisons

Compare Claude 4 Opus with

Gemini 2.5 Pro o3 Claude 3.7 Sonnet Claude 3 Opus Claude Opus 4.1 GPT-4 GPT-4.1 GPT 4.5 Preview GPT-4o GPT-5

Compare Claude 4 Sonnet with

Claude Opus 4.1 GPT-4o Claude 3 Opus Claude Opus 4.5

Frequently asked questions

Which is cheaper, Claude 4 Opus or Claude 4 Sonnet?

Claude 4 Sonnet is cheaper for input ($5.00 vs $3.00 per 1M tokens). Claude 4 Sonnet is cheaper for output ($25.00 vs $15.00 per 1M tokens).

What is the context window difference between Claude 4 Opus and Claude 4 Sonnet?

Both Claude 4 Opus and Claude 4 Sonnet have about a 200K-token context window.

How do Claude 4 Opus and Claude 4 Sonnet compare on benchmarks?

On the tracked Artificial Analysis indices, they score about the same on intelligence.

Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily

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