Claude Sonnet 5 vs GPT-4.1

Claude Sonnet 5 leads GPT-4.1 on the Artificial Analysis Intelligence Index, 38.2 to 12.7, and GPT-4.1 costs 1.3x less per output token ($8.00 vs $10.00 per million). Updated October 22, 2026; 66 benchmarks have a result for both.

Replace Claude Sonnet 5 Replace GPT-4.1

Claude Sonnet 5Anthropic

Coding: 57.7
Overall: 63.2
Output $/M: $10.00

GPT-4.1OpenAI

Coding: No data
Overall: 36.5
Output $/M: $8.00

vs boards won of 66 shared

Claude Sonnet 5 or GPT-4.1: which to pick

Only Claude Sonnet 5 has a coding score, 57.7 on the Vibe Coding Index; GPT-4.1 has none, so the two cannot be ranked on coding.

Pick GPT-4.1 for output tokens 1.3x cheaper ($8.00 vs $10.00 per million) and a lower cost per solved task ($0.37 against $1.87).

Model AClaude Sonnet 5Anthropic57.7/1006 independent benchmarks$1.87 per solved task Model BGPT-4.1OpenAINot benchmarkedNo coding benchmark$0.37 per solved task

665526

Shared results: 66
Claude Sonnet 5 only: 55
GPT-4.1 only: 26
Like-for-like categories: 7 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

Coding
Vibe Coding Index, six public coding benchmarks
No call
Only Claude Sonnet 5 has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
Claude Sonnet 5
Claude Sonnet 5 leads, 38.2 against 12.7.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Claude Sonnet 5 has a AA Agentic Index result, 43.6.
Directional only
Reasoning
GPQA Diamond
Claude Sonnet 5
Claude Sonnet 5 leads, 88.9% against 65.4%.
Same board, both measured
Math
AIME
No call
Only GPT-4.1 has a AIME result, 39.6%.
Directional only
Knowledge
MMLU Pro
Claude Sonnet 5
Claude Sonnet 5 leads, 87.5% against 80.5%.
Same board, both measured
Web design
Design Arena: websites
Claude Sonnet 5
Claude Sonnet 5 leads, 1274 against 1038.
Same board, both measured
Long documents
Listed context window
GPT-4.1
GPT-4.1 takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
GPT-4.1
Claude Sonnet 5 $0.0070, GPT-4.1 $0.0060 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
GPT-4.1
Claude Sonnet 5 $1.87, GPT-4.1 $0.37.
Published attempt cost and pass rate

At a glance

Coding index: Claude Sonnet 5 57.7 from 6 benchmarks, GPT-4.1 not benchmarked.
Widest category: Math, 38.1 points apart on average over 4 shared benchmarks.
Widest single gap: FrontierMath, tiers 1 to 3: Claude Sonnet 5 65.6% against GPT-4.1 6.0%, 59.6 points apart on a 0 to 100 scale.
Output price: Claude Sonnet 5 $10.00 against GPT-4.1 $8.00 per million output tokens, 1.3x apart.
Context window: Claude Sonnet 5 takes 1M tokens, GPT-4.1 1.05M.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
Category	Claude Sonnet 5	Bars	GPT-4.1	Ties
Coding	6		0
Intelligence	2		0
Reasoning	12		0
Math	4		0
Knowledge	10		0
Web design	6		0
General	26		0
All shared boards	66		0

CodingLike-for-likeSix of these boards feed the Vibe Coding Index60

Coding benchmarks for Claude Sonnet 5 and GPT-4.1
Benchmark	Claude Sonnet 5	GPT-4.1	Leader
Aider polyglot	Not measured	52.4%	Only GPT-4.1 measured
SWE-bench Verified	Not measured	39.6%	Only GPT-4.1 measured
SWE-bench Multimodal	Not measured	31.1%	Only GPT-4.1 measured
LiveBench coding	74.7%	Not measured	Only Claude Sonnet 5 measured
LMArena WebDev	1540	Not measured	Only Claude Sonnet 5 measured
AA Coding Index	71.5	Not measured	Only Claude Sonnet 5 measured
LiveCodeBench (Vals AI)	82.4%	54.7%	Claude Sonnet 5
SWE-bench Verified (Vals AI)	79.6%	Not measured	Only Claude Sonnet 5 measured
Terminal-Bench 4 (Vals AI)	10.6%	Not measured	Only Claude Sonnet 5 measured
Vibe Code Bench (Vals AI)	81.3%	Not measured	Only Claude Sonnet 5 measured
Code migration (Vals AI)	44.4%	Not measured	Only Claude Sonnet 5 measured
ProgramBench (Vals AI)	0.0%	Not measured	Only Claude Sonnet 5 measured
IOI (Vals AI)	45.0%	Not measured	Only Claude Sonnet 5 measured
Terminal-Bench 2.1 (Vals AI)	74.5%	Not measured	Only Claude Sonnet 5 measured
Vibe Code Bench 1-100 (Vals AI)	13.8%	Not measured	Only Claude Sonnet 5 measured
SkillsBench (Vals AI)	46.5%	Not measured	Only Claude Sonnet 5 measured
CyberBench (Vals AI)	70.3%	Not measured	Only Claude Sonnet 5 measured
LiveCodeBench (Artificial Analysis run)	Not measured	45.7%	Only GPT-4.1 measured
SciCode	54.3%	Not measured	Only Claude Sonnet 5 measured
Terminal-Bench Hard (Artificial Analysis run)	Not measured	13.6%	Only GPT-4.1 measured
FrontierCode	42.7%	Not measured	Only Claude Sonnet 5 measured
GSO-Bench	37.3%	Not measured	Only Claude Sonnet 5 measured
WeirdML	68.8%	39.0%	Claude Sonnet 5
ALE-Bench	1463.1	558.1	Claude Sonnet 5
LMArena Text: coding	1483	1390	Claude Sonnet 5
LMArena Text: software and IT	1474	1391	Claude Sonnet 5
LMArena WebDev: React	1541	Not measured	Only Claude Sonnet 5 measured
LMArena WebDev: HTML	1527	Not measured	Only Claude Sonnet 5 measured
LMArena WebDev: from an image	1540	Not measured	Only Claude Sonnet 5 measured
SciCode	10.7%	4.6%	Claude Sonnet 5
Neither model has a result on the other 9 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20

Intelligence benchmarks for Claude Sonnet 5 and GPT-4.1
Benchmark	Claude Sonnet 5	GPT-4.1	Leader
AA Intelligence Index	38.2	12.7	Claude Sonnet 5
Epoch Capabilities Index	156.9	136.7	Claude Sonnet 5

Agentic workDirectional onlyPublic boards, shown as published, kept out of the index24 boards, none shared

Agentic work benchmarks for Claude Sonnet 5 and GPT-4.1
Benchmark	Claude Sonnet 5	GPT-4.1	Leader
AA Agentic Index	43.6	Not measured	Only Claude Sonnet 5 measured
Design Arena: agents building web apps	1245	Not measured	Only Claude Sonnet 5 measured
Design Arena: agents building full-stack apps	1249	Not measured	Only Claude Sonnet 5 measured
Design Arena: agents building mobile apps	1215	Not measured	Only Claude Sonnet 5 measured
Design Arena: agents building Android apps	1227	Not measured	Only Claude Sonnet 5 measured
Design Arena: agents building Godot games	1225	Not measured	Only Claude Sonnet 5 measured
Design Arena: agents building games	1227	Not measured	Only Claude Sonnet 5 measured
Design Arena: HTML slides	1168	Not measured	Only Claude Sonnet 5 measured
Design Arena: PowerPoint slides	1191	Not measured	Only Claude Sonnet 5 measured
Design Arena: spreadsheets	1035	Not measured	Only Claude Sonnet 5 measured
LiveBench research	82.8%	Not measured	Only Claude Sonnet 5 measured
LiveBench browser	72.0%	Not measured	Only Claude Sonnet 5 measured
LiveBench long agentic	39.0%	Not measured	Only Claude Sonnet 5 measured
SREBench (Vals AI)	0.4%	Not measured	Only Claude Sonnet 5 measured
Finance Agent (Vals AI)	53.9%	Not measured	Only Claude Sonnet 5 measured
Tax Agent Bench (Vals AI)	29.4%	Not measured	Only Claude Sonnet 5 measured
Legal Research Bench (Vals AI)	41.8%	Not measured	Only Claude Sonnet 5 measured
Excel Modeling Benchmark (Vals AI)	66.3%	Not measured	Only Claude Sonnet 5 measured
Terminal-Bench-Science (Vals AI)	5.7%	Not measured	Only Claude Sonnet 5 measured
τ²-Bench Telecom	Not measured	47.1%	Only GPT-4.1 measured
APEX-Agents	54.5%	Not measured	Only Claude Sonnet 5 measured
Vending-Bench 2	$6,378	Not measured	Only Claude Sonnet 5 measured
Berkeley Function Calling Leaderboard (BFCL)	Not measured	54.0%	Only GPT-4.1 measured
BrowseComp-Plus	Not measured	36.4%	Only GPT-4.1 measured
Neither model has a result on the other 17 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index120

Reasoning benchmarks for Claude Sonnet 5 and GPT-4.1
Benchmark	Claude Sonnet 5	GPT-4.1	Leader
GPQA Diamond	88.9%	65.4%	Claude Sonnet 5
LiveBench reasoning	88.7%	Not measured	Only Claude Sonnet 5 measured
MMMU Pro (Vals AI)	83.0%	72.4%	Claude Sonnet 5
GPQA Diamond (Artificial Analysis run)	91.1%	66.6%	Claude Sonnet 5
Humanity's Last Exam (Artificial Analysis run)	41.3%	4.2%	Claude Sonnet 5
GPQA Diamond (Epoch AI run)	90.5%	66.9%	Claude Sonnet 5
ARC-AGI	Not measured	5.5%	Only GPT-4.1 measured
ARC-AGI-2	Not measured	0.4%	Only GPT-4.1 measured
SimpleBench	60.6%	27.0%	Claude Sonnet 5
Chess puzzles	45.0%	3.0%	Claude Sonnet 5
Mystery game puzzles	35.0%	Not measured	Only Claude Sonnet 5 measured
LMArena Text: hard prompts	1461	1384	Claude Sonnet 5
LMArena Text: expert	1489	1364	Claude Sonnet 5
LMArena Text: hard prompts in English	1464	1393	Claude Sonnet 5
LMArena Vision: diagrams	1293	1215	Claude Sonnet 5
LMArena Vision: homework	1311	1248	Claude Sonnet 5
Kagi LLM Benchmark	Not measured	52.3%	Only GPT-4.1 measured
Neither model has a result on the other 5 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index40

Math benchmarks for Claude Sonnet 5 and GPT-4.1
Benchmark	Claude Sonnet 5	GPT-4.1	Leader
AIME	Not measured	39.6%	Only GPT-4.1 measured
MATH 500 (Vals AI)	Not measured	87.2%	Only GPT-4.1 measured
MGSM (Vals AI)	Not measured	87.7%	Only GPT-4.1 measured
AA Math Index	Not measured	34.7	Only GPT-4.1 measured
AIME 2025 (Artificial Analysis run)	Not measured	34.7%	Only GPT-4.1 measured
OTIS Mock AIME	94.7%	38.3%	Claude Sonnet 5
FrontierMath, tiers 1 to 3	65.6%	6.0%	Claude Sonnet 5
FrontierMath, tier 4	29.3%	Not measured	Only Claude Sonnet 5 measured
ProofBench	77.0%	Not measured	Only Claude Sonnet 5 measured
MATH level 5	Not measured	83.0%	Only GPT-4.1 measured
LMArena Text: math	1467	1369	Claude Sonnet 5
LMArena Text: mathematical work	1481	1360	Claude Sonnet 5
Neither model has a result on the other 1 board here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index100

Knowledge benchmarks for Claude Sonnet 5 and GPT-4.1
Benchmark	Claude Sonnet 5	GPT-4.1	Leader
MMLU Pro	87.5%	80.5%	Claude Sonnet 5
LegalBench (Vals AI)	83.9%	83.1%	Claude Sonnet 5
CaseLaw (Vals AI)	Not measured	69.9%	Only GPT-4.1 measured
CorpFin (Vals AI)	67.0%	63.0%	Claude Sonnet 5
TaxEval (Vals AI)	75.6%	75.1%	Claude Sonnet 5
MortgageTax (Vals AI)	70.0%	65.9%	Claude Sonnet 5
MedQA (Vals AI)	Not measured	91.2%	Only GPT-4.1 measured
MedCode (Vals AI)	47.5%	Not measured	Only Claude Sonnet 5 measured
MMLU Pro (Artificial Analysis run)	Not measured	80.6%	Only GPT-4.1 measured
SimpleQA Verified	33.7%	31.1%	Claude Sonnet 5
GeoBench	Not measured	72.0%	Only GPT-4.1 measured
LMArena Text: science	1460	1382	Claude Sonnet 5
LMArena Text: medicine and healthcare	1442	1379	Claude Sonnet 5
LMArena Text: legal and government	1454	1399	Claude Sonnet 5
LMArena Text: business and finance	1436	1369	Claude Sonnet 5
FACTS Benchmark Suite	Not measured	45.8%	Only GPT-4.1 measured
Neither model has a result on the other 2 boards here

Web designLike-for-likePublic boards, shown as published, kept out of the index60

Web design benchmarks for Claude Sonnet 5 and GPT-4.1
Benchmark	Claude Sonnet 5	GPT-4.1	Leader
Design Arena: websites	1274	1038	Claude Sonnet 5
Design Arena: UI components	1277	997	Claude Sonnet 5
Design Arena: game dev	1277	1079	Claude Sonnet 5
Design Arena: data viz	1251	1104	Claude Sonnet 5
Design Arena: 3D	1261	849	Claude Sonnet 5
Design Arena: all code categories	1275	1025	Claude Sonnet 5
Design Arena: SVG	1192	Not measured	Only Claude Sonnet 5 measured
Design Arena: ASCII art	1207	Not measured	Only Claude Sonnet 5 measured
LiveBench design	82.0%	Not measured	Only Claude Sonnet 5 measured

GeneralLike-for-likePublic boards, shown as published, kept out of the index260

General benchmarks for Claude Sonnet 5 and GPT-4.1
Benchmark	Claude Sonnet 5	GPT-4.1	Leader
LiveBench data analysis	71.7%	Not measured	Only Claude Sonnet 5 measured
Public Benefits Bench (Vals AI)	66.0%	Not measured	Only Claude Sonnet 5 measured
SAGE (Vals AI)	48.9%	Not measured	Only Claude Sonnet 5 measured
MedScribe (Vals AI)	76.0%	Not measured	Only Claude Sonnet 5 measured
Vals Multimodal Index	68.8%	Not measured	Only Claude Sonnet 5 measured
IFBench	Not measured	43.0%	Only GPT-4.1 measured
Long context reasoning (AA-LCR)	82.0%	68.3%	Claude Sonnet 5
DTBench	92.5%	68.3%	Claude Sonnet 5
LMCA	50.0%	25.6%	Claude Sonnet 5
Fiction.LiveBench	Not measured	63.9%	Only GPT-4.1 measured
Surface Evolver Bench	60.0%	Not measured	Only Claude Sonnet 5 measured
LMArena Text	1442	1383	Claude Sonnet 5
LMArena Text: instruction following	1452	1367	Claude Sonnet 5
LMArena Text: creative writing	1416	1363	Claude Sonnet 5
LMArena Vision	1273	1210	Claude Sonnet 5
LMArena Text: English	1450	1392	Claude Sonnet 5
LMArena Text: non-English	1431	1370	Claude Sonnet 5
LMArena Text: Chinese	1478	1382	Claude Sonnet 5
LMArena Text: German	1442	1381	Claude Sonnet 5
LMArena Text: Japanese	1422	1319	Claude Sonnet 5
LMArena Text: Korean	1412	1338	Claude Sonnet 5
LMArena Text: French	1463	1382	Claude Sonnet 5
LMArena Text: Spanish	1438	1376	Claude Sonnet 5
LMArena Text: Russian	1450	1377	Claude Sonnet 5
LMArena Text: Polish	1425	1389	Claude Sonnet 5
LMArena Text: multi-turn	1453	1397	Claude Sonnet 5
LMArena Text: longer queries	1462	1385	Claude Sonnet 5
LMArena Text: writing and language	1436	1371	Claude Sonnet 5
LMArena Text: entertainment and media	1411	1365	Claude Sonnet 5
LMArena Vision: English	1275	1209	Claude Sonnet 5
LMArena Vision: Chinese	1331	1226	Claude Sonnet 5
LMArena Vision: reading text	1288	1218	Claude Sonnet 5
LMArena Vision: humor	1261	1196	Claude Sonnet 5
LMArena Vision: captioning	Not measured	1207	Only GPT-4.1 measured
LMArena Vision: recognizing things	Not measured	1208	Only GPT-4.1 measured
LMArena Vision: creative writing	1246	1210	Claude Sonnet 5
LMArena Document	1466	Not measured	Only Claude Sonnet 5 measured
Neither model has a result on the other 9 boards here

Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared

Image generation benchmarks for Claude Sonnet 5 and GPT-4.1
Benchmark	Claude Sonnet 5	GPT-4.1	Leader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Claude Sonnet 5$0.0070Fits in one request

GPT-4.1$0.0060Fits in one request

GPT-4.1 costs less

Repository review

50K input + 3K output tokens

Claude Sonnet 5$0.130Fits in one request

GPT-4.1$0.124Fits in one request

GPT-4.1 costs less

Agent loop

200K input + 10K output tokens

Claude Sonnet 5$0.500Fits in one request

GPT-4.1$0.480Fits in one request

GPT-4.1 costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Claude Sonnet 5 and GPT-4.1
Specification	Anthropic Claude Sonnet 5	OpenAI GPT-4.1
Maker	Anthropic	OpenAI
Weights	No public weights listed	No public weights listed
Released	June 30, 2026	April 14, 2025
Context window	1M	1.05M
Input $/Mtok	$2.00	$2.00
Output $/Mtok	$10.00	$8.00
Coding index	57.7	Not benchmarked
Independent measurements behind it	6	0
Cost per solved task	$1.87	$0.37
Source	OpenRouter listing	OpenRouter listing

Questions

Is Claude Sonnet 5 better than GPT-4.1 for coding?

Only Claude Sonnet 5 has a coding score, 57.7 on the Vibe Coding Index; GPT-4.1 has none, so the two cannot be ranked on coding. Pick GPT-4.1 for output tokens 1.3x cheaper ($8.00 vs $10.00 per million) and a lower cost per solved task ($0.37 against $1.87).

Which is cheaper, Claude Sonnet 5 or GPT-4.1?

Claude Sonnet 5 costs $2.00 per million input tokens and $10.00 per million output tokens; GPT-4.1 costs $2.00 and $8.00. Per solved SWE-bench Verified task, Claude Sonnet 5 costs $1.87 and GPT-4.1 $0.37.

Which has the bigger context window, Claude Sonnet 5 or GPT-4.1?

GPT-4.1, with 1.05M tokens against 1M.

How many benchmarks is the Claude Sonnet 5 vs GPT-4.1 comparison based on?

66 benchmarks have a result for both models as of October 22, 2026. Claude Sonnet 5's coding index rests on 6 independent benchmarks and GPT-4.1's on 0. Where only one model has a result, the page says so instead of naming a winner.

Claude Sonnet 5 or GPT-4.1: which to pick

Which one for your work

Coding

Intelligence

Agentic work

Reasoning

Math

Knowledge

Web design

Long documents

Everyday cost

Cost per solved task

At a glance

Benchmark by benchmark

What each workload costs

Chat turn

Repository review

Agent loop

Specification differences

Questions

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