THE MATCHUP

Two models. All the angles.

Find the trade-offs that matter for what you’re building.

Test this pair

MODEL A

MODEL B

MODEL A

Anthropic

Claude Sonnet 4

Thoughtful reasoning. Beautifully written.

Nuanced writingCode generationReasoning

Room for context200Ktokens

Reply paceSteady

Example reply$0.0105

MODEL B

OpenAI

GPT-4.1

A versatile partner for complex work.

Instruction followingStructured outputsLong context

Room for context1Mtokens

Reply paceQuick

Example reply$0.0060

Where they stand apart

Sample insights, shaped around your next decision.

MODEL A EDGE

For your next build

Sonnet 4 leads the sample coding score by 1.7 points.

MODEL B EDGE

For a lighter API bill

GPT-4.1 costs less in a sample request with 1,000 input and 500 output tokens.

MODEL A EDGE

For the hard questions

Sonnet 4 has the higher illustrative reasoning score. Try your own prompt next.

FOR YOUR DAY-TO-DAY

A practical side-by-side

Mock capabilities

Illustrative model attributes, not verified specifications
What matters	Sonnet 4	GPT-4.1
Sample focus	Nuanced writing	Instruction following
Example use cases	Coding · Writing · Reasoning	Everyday · Coding · Writing
Text prompts	Supported	Supported
Image understanding	Included in fixture	Included in fixture
Reply pace	Steady	Quick
Example reply cost	$0.0105	$0.0060

6 attributes shownAll capabilities and rates are UI fixtures.

The numbers behind the choice

Performance and price, together in one view.

THE PERFORMANCE PICTURE

Benchmarks, side by side.

Sonnet 4GPT-4.1UI sample / 100

General knowledgeDemo · Knowledge

88.7

90.2

Code generationDemo · Code

95.1

93.4

Complex reasoningDemo · Reasoning

83.6

78.1

Simulated scores · not real evaluations

THE COST OF AN ANSWER

API pricing

USD per 1 million tokensMock rates

Token type	Sonnet 4	GPT-4.1
InputYour prompt	$3.00	$2.00
OutputThe response	$15.00	$8.00
ContextMaximum window	200K	1M

A lower token price isn’t the whole story. Response length and your workload change the final cost.

Calculate for your workload

MAKE THE NUMBERS YOURS

What would it cost you?

Same workload. Two very different bills.

Input tokens / request

020,000

Output tokens / request

010,000

Requests / month

0100,000

ESTIMATED MONTHLY API COSTSimulation

Claude Sonnet 4

$105.00/month

GPT-4.1LOWER COST

$60.00/month

GPT-4.1 is 42.9% less for this sample workload. That’s $45.00 a month.

Illustrative, uncached text-token rates. Excludes taxes, retries and other provider charges. No payment is made.

Numbers tell part of the story.

Your prompt tells the rest.

Try them side by side