GPT-5.1 vs Qwen3.6 Plus

Updated October 21, 2026. 73 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace GPT-5.1 Replace Qwen3.6 Plus

GPT-5.1OpenAI

Coding: 53.3
Overall: 24.7
Output $/M: $10.00

Qwen3.6 PlusQwen

Coding: 37.4
Overall: 27.0
Output $/M: $1.95

vs boards won of 73 shared

Decision reading

Pick GPT-5.1 for coding: it scores 53.3 on the Vibe Coding Index against 37.4 for Qwen3.6 Plus.

Pick Qwen3.6 Plus when output tokens cost 5.1x less, or when the context window is larger, 1M against 400K tokens.

Model AGPT-5.1OpenAI53.3/1002 independent benchmarks$1.02 per solved task Model BQwen3.6 PlusQwen37.4/1001 independent benchmark$1.19 per solved task

732710

Shared results: 73
GPT-5.1 only: 27
Qwen3.6 Plus only: 10
Like-for-like categories: 8 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

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, four public coding benchmarks
GPT-5.1
GPT-5.1 scores 53.3 against 37.4.
2 and 1 benchmarks behind the scores
Intelligence
AA Intelligence Index
Qwen3.6 Plus
Qwen3.6 Plus leads, 27.0 against 24.7.
Same board, both measured
Reasoning
GPQA Diamond
Qwen3.6 Plus
Qwen3.6 Plus leads, 87.4% against 86.6%.
Same board, both measured
Math
AIME
Qwen3.6 Plus
Qwen3.6 Plus leads, 94.6% against 93.3%.
Same board, both measured
Knowledge
MMLU Pro
Qwen3.6 Plus
Qwen3.6 Plus leads, 87.7% against 86.4%.
Same board, both measured
Web design
Design Arena: websites
Qwen3.6 Plus
Qwen3.6 Plus leads, 1243 against 1187.
Same board, both measured
Long documents
Listed context window
Qwen3.6 Plus
Qwen3.6 Plus takes 1M tokens against 400K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Qwen3.6 Plus
GPT-5.1 $0.0063, Qwen3.6 Plus $0.0013 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
GPT-5.1
GPT-5.1 $1.02, Qwen3.6 Plus $1.19.
Published attempt cost and pass rate

At a glance

Coding index: GPT-5.1 53.3 from 2 benchmarks, Qwen3.6 Plus 37.4 from 1 benchmark.
Widest category: Agentic work, 19.3 points apart on average over 2 shared benchmarks.
Widest single gap: Chess puzzles: GPT-5.1 42.0% against Qwen3.6 Plus 14.0%, 28.0 points apart on a 0 to 100 scale.
Output price: GPT-5.1 $10.00 against Qwen3.6 Plus $1.95 per million output tokens, 5.1x apart.
Context window: GPT-5.1 takes 400K tokens, Qwen3.6 Plus 1M.

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	GPT-5.1	Qwen3.6 Plus
Coding	2	9
Intelligence	1	1
Agentic work	0	2
Reasoning	6	4
Math	1	3
Knowledge	10	2
Web design	1	7
General	20	4
All shared boards	41	32

CodingLike-for-likeFour of these boards feed the Vibe Coding Index29

Coding benchmarks for GPT-5.1 and Qwen3.6 Plus
Benchmark	GPT-5.1	Qwen3.6 Plus	Leader
SWE-bench Verified	66.0%	Not measured	Only GPT-5.1 measured
LMArena WebDev	1396	1461	Qwen3.6 Plus
AA Coding Index	49.4	54.5	Qwen3.6 Plus
LiveCodeBench (Vals AI)	86.5%	86.0%	GPT-5.1
SWE-bench Verified (Vals AI)	69.8%	73.4%	Qwen3.6 Plus
Vibe Code Bench (Vals AI)	24.6%	25.6%	Qwen3.6 Plus
Code migration (Vals AI)	Not measured	11.1%	Only Qwen3.6 Plus measured
ProgramBench (Vals AI)	Not measured	0.0%	Only Qwen3.6 Plus measured
Terminal-Bench 2.1 (Vals AI)	Not measured	53.2%	Only Qwen3.6 Plus measured
LiveCodeBench (Artificial Analysis run)	86.8%	Not measured	Only GPT-5.1 measured
Terminal-Bench Hard (Artificial Analysis run)	45.5%	43.9%	GPT-5.1
Terminal-Bench	47.6%	Not measured	Only GPT-5.1 measured
GSO-Bench	13.7%	Not measured	Only GPT-5.1 measured
WeirdML	60.8%	Not measured	Only GPT-5.1 measured
ALE-Bench	Not measured	670.1	Only Qwen3.6 Plus measured
LMArena Text: coding	1453	1467	Qwen3.6 Plus
LMArena Text: software and IT	1454	1462	Qwen3.6 Plus
LMArena WebDev: React	1307	1454	Qwen3.6 Plus
LMArena WebDev: HTML	1405	1463	Qwen3.6 Plus
LMArena WebDev: from an image	1421	1472	Qwen3.6 Plus
Neither model has a result on the other 18 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index11

Intelligence benchmarks for GPT-5.1 and Qwen3.6 Plus
Benchmark	GPT-5.1	Qwen3.6 Plus	Leader
AA Intelligence Index	24.7	27.0	Qwen3.6 Plus
Epoch Capabilities Index	149.8	147.3	GPT-5.1

Agentic workLike-for-likePublic boards, shown as published, kept out of the index02

Agentic work benchmarks for GPT-5.1 and Qwen3.6 Plus
Benchmark	GPT-5.1	Qwen3.6 Plus	Leader
Finance Agent (Vals AI)	Not measured	40.9%	Only Qwen3.6 Plus measured
Tax Agent Bench (Vals AI)	Not measured	7.7%	Only Qwen3.6 Plus measured
Legal Research Bench (Vals AI)	Not measured	14.9%	Only Qwen3.6 Plus measured
Excel Modeling Benchmark (Vals AI)	Not measured	32.9%	Only Qwen3.6 Plus measured
τ²-Bench Telecom	81.9%	97.7%	Qwen3.6 Plus
DeepResearch Bench	42.8%	Not measured	Only GPT-5.1 measured
Vending-Bench 2	$1,473	$5,115	Qwen3.6 Plus
Neither model has a result on the other 32 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index64

Reasoning benchmarks for GPT-5.1 and Qwen3.6 Plus
Benchmark	GPT-5.1	Qwen3.6 Plus	Leader
GPQA Diamond	86.6%	87.4%	Qwen3.6 Plus
MMMU Pro (Vals AI)	83.2%	84.2%	Qwen3.6 Plus
GPQA Diamond (Artificial Analysis run)	87.3%	88.2%	Qwen3.6 Plus
Humanity's Last Exam (Artificial Analysis run)	28.5%	27.8%	GPT-5.1
GPQA Diamond (Epoch AI run)	87.6%	88.4%	Qwen3.6 Plus
ARC-AGI	72.8%	Not measured	Only GPT-5.1 measured
ARC-AGI-2	17.6%	Not measured	Only GPT-5.1 measured
SimpleBench	53.2%	Not measured	Only GPT-5.1 measured
Chess puzzles	42.0%	14.0%	GPT-5.1
Mystery game puzzles	19.0%	12.0%	GPT-5.1
VPCT	58.7%	Not measured	Only GPT-5.1 measured
LMArena Text: hard prompts	1457	1448	GPT-5.1
LMArena Text: expert	1470	1454	GPT-5.1
LMArena Text: hard prompts in English	1462	1455	GPT-5.1
LMArena Vision: diagrams	1264	Not measured	Only GPT-5.1 measured
LMArena Vision: homework	1272	Not measured	Only GPT-5.1 measured
Neither model has a result on the other 5 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index13

Math benchmarks for GPT-5.1 and Qwen3.6 Plus
Benchmark	GPT-5.1	Qwen3.6 Plus	Leader
AIME	93.3%	94.6%	Qwen3.6 Plus
MGSM (Vals AI)	93.0%	Not measured	Only GPT-5.1 measured
AA Math Index	94.0	Not measured	Only GPT-5.1 measured
AIME 2025 (Artificial Analysis run)	94.0%	Not measured	Only GPT-5.1 measured
OTIS Mock AIME	88.6%	93.3%	Qwen3.6 Plus
FrontierMath, tiers 1 to 3	Not measured	38.2%	Only Qwen3.6 Plus measured
LMArena Text: math	1446	1449	Qwen3.6 Plus
LMArena Text: mathematical work	1449	1448	GPT-5.1
Neither model has a result on the other 5 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index102

Knowledge benchmarks for GPT-5.1 and Qwen3.6 Plus
Benchmark	GPT-5.1	Qwen3.6 Plus	Leader
MMLU Pro	86.4%	87.7%	Qwen3.6 Plus
LegalBench (Vals AI)	85.7%	84.2%	GPT-5.1
CaseLaw (Vals AI)	73.4%	51.5%	GPT-5.1
CorpFin (Vals AI)	63.8%	61.9%	GPT-5.1
TaxEval (Vals AI)	74.9%	74.7%	GPT-5.1
MortgageTax (Vals AI)	61.4%	68.0%	Qwen3.6 Plus
MedQA (Vals AI)	96.4%	Not measured	Only GPT-5.1 measured
MedCode (Vals AI)	52.7%	36.9%	GPT-5.1
MMLU Pro (Artificial Analysis run)	87.0%	Not measured	Only GPT-5.1 measured
SimpleQA Verified	48.0%	44.1%	GPT-5.1
LMArena Text: science	1459	1439	GPT-5.1
LMArena Text: medicine and healthcare	1456	1442	GPT-5.1
LMArena Text: legal and government	1459	1437	GPT-5.1
LMArena Text: business and finance	1431	1430	GPT-5.1
Neither model has a result on the other 3 boards here

Web designLike-for-likePublic boards, shown as published, kept out of the index17

Web design benchmarks for GPT-5.1 and Qwen3.6 Plus
Benchmark	GPT-5.1	Qwen3.6 Plus	Leader
Design Arena: websites	1187	1243	Qwen3.6 Plus
Design Arena: UI components	1166	1233	Qwen3.6 Plus
Design Arena: game dev	1179	1211	Qwen3.6 Plus
Design Arena: data viz	1204	1228	Qwen3.6 Plus
Design Arena: 3D	1061	1202	Qwen3.6 Plus
Design Arena: all code categories	1171	1236	Qwen3.6 Plus
Design Arena: SVG	1149	1160	Qwen3.6 Plus
Design Arena: ASCII art	1118	1115	GPT-5.1
Neither model has a result on the other 1 board here

GeneralLike-for-likePublic boards, shown as published, kept out of the index204

General benchmarks for GPT-5.1 and Qwen3.6 Plus
Benchmark	GPT-5.1	Qwen3.6 Plus	Leader
SAGE (Vals AI)	43.2%	44.9%	Qwen3.6 Plus
MedScribe (Vals AI)	88.1%	77.0%	GPT-5.1
Vals Multimodal Index	Not measured	51.5%	Only Qwen3.6 Plus measured
IFBench	72.9%	75.2%	Qwen3.6 Plus
Long context reasoning (AA-LCR)	80.0%	78.3%	GPT-5.1
DTBench	90.1%	81.9%	GPT-5.1
LMCA	43.9%	33.1%	GPT-5.1
CL-bench	23.7%	20.3%	GPT-5.1
CL-bench Life	17.3%	Not measured	Only GPT-5.1 measured
LMArena Text	1443	1436	GPT-5.1
LMArena Text: instruction following	1443	1424	GPT-5.1
LMArena Text: creative writing	1427	1404	GPT-5.1
LMArena Vision	1250	Not measured	Only GPT-5.1 measured
LMArena Text: English	1451	1445	GPT-5.1
LMArena Text: non-English	1431	1424	GPT-5.1
LMArena Text: Chinese	1495	1477	GPT-5.1
LMArena Text: German	1438	1451	Qwen3.6 Plus
LMArena Text: Japanese	1453	1390	GPT-5.1
LMArena Text: Korean	1401	1379	GPT-5.1
LMArena Text: French	1450	1455	Qwen3.6 Plus
LMArena Text: Spanish	1433	1432	GPT-5.1
LMArena Text: Russian	1435	1434	GPT-5.1
LMArena Text: Polish	1440	1433	GPT-5.1
LMArena Text: multi-turn	1450	1438	GPT-5.1
LMArena Text: longer queries	1448	1439	GPT-5.1
LMArena Text: writing and language	1428	1418	GPT-5.1
LMArena Text: entertainment and media	1415	1402	GPT-5.1
LMArena Vision: English	1252	Not measured	Only GPT-5.1 measured
LMArena Vision: Chinese	1270	Not measured	Only GPT-5.1 measured
LMArena Vision: reading text	1255	Not measured	Only GPT-5.1 measured
LMArena Vision: humor	1263	Not measured	Only GPT-5.1 measured
LMArena Vision: captioning	1252	Not measured	Only GPT-5.1 measured
LMArena Vision: recognizing things	1232	Not measured	Only GPT-5.1 measured
LMArena Vision: creative writing	1266	Not measured	Only GPT-5.1 measured
LMArena Document	1403	Not measured	Only GPT-5.1 measured
Neither model has a result on the other 11 boards here

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

Image generation benchmarks for GPT-5.1 and Qwen3.6 Plus
Benchmark	GPT-5.1	Qwen3.6 Plus	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

GPT-5.1$0.0063Fits in one request

Qwen3.6 Plus$0.0013Fits in one request

Qwen3.6 Plus costs less

Repository review

50K input + 3K output tokens

GPT-5.1$0.092Fits in one request

Qwen3.6 Plus$0.022Fits in one request

Qwen3.6 Plus costs less

Agent loop

200K input + 10K output tokens

GPT-5.1$0.350Fits in one request

Qwen3.6 Plus$0.085Fits in one request

Qwen3.6 Plus 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 GPT-5.1 and Qwen3.6 Plus
Specification	OpenAI GPT-5.1	Qwen3.6 Plus
Maker	OpenAI	Qwen
Weights	No public weights listed	No public weights listed
Released	November 13, 2025	April 2, 2026
Context window	400K	1M
Input $/Mtok	$1.25	$0.325
Output $/Mtok	$10.00	$1.95
Coding index	53.3	37.4
Independent measurements behind it	2	1
Cost per solved task	$1.02	$1.19
Source	OpenRouter listing	OpenRouter listing

Questions

Is GPT-5.1 better than Qwen3.6 Plus for coding?

Pick GPT-5.1 for coding: it scores 53.3 on the Vibe Coding Index against 37.4 for Qwen3.6 Plus. Pick Qwen3.6 Plus when output tokens cost 5.1x less, or when the context window is larger, 1M against 400K tokens.

Which is cheaper, GPT-5.1 or Qwen3.6 Plus?

GPT-5.1 costs $1.25 per million input tokens and $10.00 per million output tokens; Qwen3.6 Plus costs $0.325 and $1.95. Per solved SWE-bench Verified task, GPT-5.1 costs $1.02 and Qwen3.6 Plus $1.19.

Which has the bigger context window, GPT-5.1 or Qwen3.6 Plus?

Qwen3.6 Plus, with 1M tokens against 400K.

How many benchmarks is the GPT-5.1 vs Qwen3.6 Plus comparison based on?

73 benchmarks have a result for both models as of October 21, 2026. GPT-5.1's coding index rests on 2 independent benchmarks and Qwen3.6 Plus's on 1. Where only one model has a result, the page says so instead of naming a winner.

Decision reading

Which one for your work

Coding

Intelligence

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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