Gemini 3.1 Pro Preview vs Qwen3.5 397B A17B

Gemini 3.1 Pro Preview leads Qwen3.5 397B A17B on the Artificial Analysis Intelligence Index, 29.7 to 21.4, and Qwen3.5 397B A17B costs 5.1x less per output token ($2.34 vs $12.00 per million). Updated October 22, 2026; 64 benchmarks have a result for both.

Replace Gemini 3.1 Pro Preview Replace Qwen3.5 397B A17B

Gemini 3.1 Pro PreviewGoogle

Coding: 32.3
Overall: 54.0
Output $/M: $12.00

Qwen3.5 397B A17BQwen

Coding: No data
Overall: 57.1
Output $/M: $2.34

vs boards won of 64 shared, 1 tied

Gemini 3.1 Pro Preview or Qwen3.5 397B A17B: which to pick

Only Gemini 3.1 Pro Preview has a coding score, 32.3 on the Vibe Coding Index; Qwen3.5 397B A17B has none, so the two cannot be ranked on coding.

Pick Qwen3.5 397B A17B for output tokens 5.1x cheaper ($2.34 vs $12.00 per million) and work measured by IFBench, where it leads.

Model AGemini 3.1 Pro PreviewGoogle32.3/1004 independent benchmarks$0.99 per solved task Model BQwen3.5 397B A17BQwenNot benchmarked1 independent benchmarkNo cost per solved task

64691

Shared results: 64
Gemini 3.1 Pro Preview only: 69
Qwen3.5 397B A17B only: 1
Like-for-like categories: 8 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 Gemini 3.1 Pro Preview has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 29.7 against 21.4.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Gemini 3.1 Pro Preview has a AA Agentic Index result, 8.2.
Directional only
Reasoning
GPQA Diamond
No call
Only Gemini 3.1 Pro Preview has a GPQA Diamond result, 95.5%.
Directional only
Math
AIME
No call
Only Gemini 3.1 Pro Preview has a AIME result, 98.1%.
Directional only
Knowledge
MMLU Pro
No call
Only Gemini 3.1 Pro Preview has a MMLU Pro result, 91.0%.
Directional only
Web design
Design Arena: websites
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 1233 against 1190.
Same board, both measured
Long documents
Listed context window
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview takes 1.05M tokens against 262K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Qwen3.5 397B A17B
Gemini 3.1 Pro Preview $0.0080, Qwen3.5 397B A17B $0.0016 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Gemini 3.1 Pro Preview has the number, $0.99.
Directional only

At a glance

Coding index: Gemini 3.1 Pro Preview 32.3 from 4 benchmarks, Qwen3.5 397B A17B not benchmarked.
Widest category: Math, 11.1 points apart on average over 4 shared benchmarks.
Widest single gap: FrontierMath, tiers 1 to 3: Gemini 3.1 Pro Preview 59.6% against Qwen3.5 397B A17B 31.2%, 28.4 points apart on a 0 to 100 scale.
Output price: Gemini 3.1 Pro Preview $12.00 against Qwen3.5 397B A17B $2.34 per million output tokens, 5.1x apart.
Context window: Gemini 3.1 Pro Preview takes 1.05M tokens, Qwen3.5 397B A17B 262K.

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	Gemini 3.1 Pro Preview	Qwen3.5 397B A17B	Ties
Coding	8	0
Intelligence	1	0
Agentic work	1	0	1 tie
Reasoning	9	0
Math	4	0
Knowledge	4	0
Web design	7	0
General	28	1
All shared boards	62	1	1 tie

CodingLike-for-likeSix of these boards feed the Vibe Coding Index80

Coding benchmarks for Gemini 3.1 Pro Preview and Qwen3.5 397B A17B
Benchmark	Gemini 3.1 Pro Preview	Qwen3.5 397B A17B	Leader
LMArena WebDev	1447	1400	Gemini 3.1 Pro Preview
AA Coding Index	68.8	Not measured	Only Gemini 3.1 Pro Preview measured
LiveCodeBench (Vals AI)	88.5%	Not measured	Only Gemini 3.1 Pro Preview measured
SWE-bench Verified (Vals AI)	78.8%	Not measured	Only Gemini 3.1 Pro Preview measured
Terminal-Bench 4 (Vals AI)	2.5%	Not measured	Only Gemini 3.1 Pro Preview measured
Vibe Code Bench (Vals AI)	32.0%	Not measured	Only Gemini 3.1 Pro Preview measured
Code migration (Vals AI)	17.3%	Not measured	Only Gemini 3.1 Pro Preview measured
ProgramBench (Vals AI)	0.0%	Not measured	Only Gemini 3.1 Pro Preview measured
IOI (Vals AI)	51.8%	Not measured	Only Gemini 3.1 Pro Preview measured
Terminal-Bench 2.1 (Vals AI)	70.8%	Not measured	Only Gemini 3.1 Pro Preview measured
Vibe Code Bench 1-100 (Vals AI)	6.7%	Not measured	Only Gemini 3.1 Pro Preview measured
SciCode	58.7%	44.8%	Gemini 3.1 Pro Preview
Terminal-Bench Hard (Artificial Analysis run)	53.8%	40.9%	Gemini 3.1 Pro Preview
Terminal-Bench	80.2%	Not measured	Only Gemini 3.1 Pro Preview measured
GSO-Bench	22.6%	Not measured	Only Gemini 3.1 Pro Preview measured
WeirdML	72.1%	Not measured	Only Gemini 3.1 Pro Preview measured
MirrorCode	8.9%	Not measured	Only Gemini 3.1 Pro Preview measured
ALE-Bench	1160.6	621.9	Gemini 3.1 Pro Preview
LMArena Text: coding	1484	1464	Gemini 3.1 Pro Preview
LMArena Text: software and IT	1487	1463	Gemini 3.1 Pro Preview
LMArena WebDev: React	1438	1388	Gemini 3.1 Pro Preview
LMArena WebDev: HTML	1490	1410	Gemini 3.1 Pro Preview
LMArena WebDev: from an image	1481	Not measured	Only Gemini 3.1 Pro Preview measured
SciCode	14.3%	Not measured	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 15 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10

Intelligence benchmarks for Gemini 3.1 Pro Preview and Qwen3.5 397B A17B
Benchmark	Gemini 3.1 Pro Preview	Qwen3.5 397B A17B	Leader
AA Intelligence Index	29.7	21.4	Gemini 3.1 Pro Preview
Epoch Capabilities Index	Not measured	146.8	Only Qwen3.5 397B A17B measured

Agentic workLike-for-likePublic boards, shown as published, kept out of the index10

Agentic work benchmarks for Gemini 3.1 Pro Preview and Qwen3.5 397B A17B
Benchmark	Gemini 3.1 Pro Preview	Qwen3.5 397B A17B	Leader
AA Agentic Index	8.2	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building web apps	1125	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building full-stack apps	1068	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building mobile apps	1094	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building Android apps	1049	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building Godot games	1236	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building games	1113	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: HTML slides	1103	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: PowerPoint slides	1041	Not measured	Only Gemini 3.1 Pro Preview measured
SREBench (Vals AI)	0.0%	Not measured	Only Gemini 3.1 Pro Preview measured
Finance Agent (Vals AI)	43.0%	Not measured	Only Gemini 3.1 Pro Preview measured
Tax Agent Bench (Vals AI)	9.3%	Not measured	Only Gemini 3.1 Pro Preview measured
Legal Research Bench (Vals AI)	20.7%	Not measured	Only Gemini 3.1 Pro Preview measured
Excel Modeling Benchmark (Vals AI)	52.6%	Not measured	Only Gemini 3.1 Pro Preview measured
BioMysteryBench (Vals AI)	60.0%	Not measured	Only Gemini 3.1 Pro Preview measured
Terminal-Bench-Science (Vals AI)	1.4%	Not measured	Only Gemini 3.1 Pro Preview measured
Vals Science Index	27.4%	Not measured	Only Gemini 3.1 Pro Preview measured
τ²-Bench Telecom	95.6%	95.6%	Tie
APEX-Agents	35.1%	24.9%	Gemini 3.1 Pro Preview
METR time horizons	77.0%	Not measured	Only Gemini 3.1 Pro Preview measured
BALROG	57.0%	Not measured	Only Gemini 3.1 Pro Preview measured
DeepResearch Bench	47.8%	Not measured	Only Gemini 3.1 Pro Preview measured
PostTrainBench	22.0%	Not measured	Only Gemini 3.1 Pro Preview measured
Vending-Bench 2	$911	Not measured	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 17 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index90

Reasoning benchmarks for Gemini 3.1 Pro Preview and Qwen3.5 397B A17B
Benchmark	Gemini 3.1 Pro Preview	Qwen3.5 397B A17B	Leader
GPQA Diamond	95.5%	Not measured	Only Gemini 3.1 Pro Preview measured
MysteryMechanism (Vals AI)	20.7%	Not measured	Only Gemini 3.1 Pro Preview measured
MMMU Pro (Vals AI)	88.2%	Not measured	Only Gemini 3.1 Pro Preview measured
GPQA Diamond (Artificial Analysis run)	94.1%	89.3%	Gemini 3.1 Pro Preview
Humanity's Last Exam (Artificial Analysis run)	47.0%	29.0%	Gemini 3.1 Pro Preview
GPQA Diamond (Epoch AI run)	94.4%	86.4%	Gemini 3.1 Pro Preview
ARC-AGI	98.0%	Not measured	Only Gemini 3.1 Pro Preview measured
ARC-AGI-2	77.1%	Not measured	Only Gemini 3.1 Pro Preview measured
SimpleBench	79.6%	Not measured	Only Gemini 3.1 Pro Preview measured
Chess puzzles	51.0%	Not measured	Only Gemini 3.1 Pro Preview measured
Mystery game puzzles	34.0%	18.0%	Gemini 3.1 Pro Preview
EBR-bench	14.3%	Not measured	Only Gemini 3.1 Pro Preview measured
LMArena Text: hard prompts	1485	1448	Gemini 3.1 Pro Preview
LMArena Text: expert	1483	1462	Gemini 3.1 Pro Preview
LMArena Text: hard prompts in English	1480	1450	Gemini 3.1 Pro Preview
LMArena Vision: diagrams	1311	1277	Gemini 3.1 Pro Preview
LMArena Vision: homework	1316	1292	Gemini 3.1 Pro Preview
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 Gemini 3.1 Pro Preview and Qwen3.5 397B A17B
Benchmark	Gemini 3.1 Pro Preview	Qwen3.5 397B A17B	Leader
AIME	98.1%	Not measured	Only Gemini 3.1 Pro Preview measured
OTIS Mock AIME	95.6%	88.9%	Gemini 3.1 Pro Preview
FrontierMath, tiers 1 to 3	59.6%	31.2%	Gemini 3.1 Pro Preview
FrontierMath, tier 4	26.8%	Not measured	Only Gemini 3.1 Pro Preview measured
ProofBench	26.0%	Not measured	Only Gemini 3.1 Pro Preview measured
LMArena Text: math	1486	1453	Gemini 3.1 Pro Preview
LMArena Text: mathematical work	1478	1454	Gemini 3.1 Pro Preview
Neither model has a result on the other 6 boards here

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

Knowledge benchmarks for Gemini 3.1 Pro Preview and Qwen3.5 397B A17B
Benchmark	Gemini 3.1 Pro Preview	Qwen3.5 397B A17B	Leader
MMLU Pro	91.0%	Not measured	Only Gemini 3.1 Pro Preview measured
LegalBench (Vals AI)	87.4%	Not measured	Only Gemini 3.1 Pro Preview measured
CaseLaw (Vals AI)	64.8%	Not measured	Only Gemini 3.1 Pro Preview measured
CorpFin (Vals AI)	64.5%	Not measured	Only Gemini 3.1 Pro Preview measured
TaxEval (Vals AI)	72.9%	Not measured	Only Gemini 3.1 Pro Preview measured
MortgageTax (Vals AI)	69.4%	Not measured	Only Gemini 3.1 Pro Preview measured
MedQA (Vals AI)	96.4%	Not measured	Only Gemini 3.1 Pro Preview measured
MedCode (Vals AI)	59.1%	Not measured	Only Gemini 3.1 Pro Preview measured
SimpleQA Verified	73.5%	Not measured	Only Gemini 3.1 Pro Preview measured
LMArena Text: science	1497	1457	Gemini 3.1 Pro Preview
LMArena Text: medicine and healthcare	1486	1455	Gemini 3.1 Pro Preview
LMArena Text: legal and government	1487	1441	Gemini 3.1 Pro Preview
LMArena Text: business and finance	1459	1435	Gemini 3.1 Pro Preview
FACTS Benchmark Suite	67.4%	Not measured	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 4 boards here

Web designLike-for-likePublic boards, shown as published, kept out of the index70

Web design benchmarks for Gemini 3.1 Pro Preview and Qwen3.5 397B A17B
Benchmark	Gemini 3.1 Pro Preview	Qwen3.5 397B A17B	Leader
Design Arena: websites	1233	1190	Gemini 3.1 Pro Preview
Design Arena: UI components	1224	1160	Gemini 3.1 Pro Preview
Design Arena: game dev	1202	1140	Gemini 3.1 Pro Preview
Design Arena: data viz	1209	1175	Gemini 3.1 Pro Preview
Design Arena: 3D	1234	1160	Gemini 3.1 Pro Preview
Design Arena: all code categories	1231	1179	Gemini 3.1 Pro Preview
Design Arena: SVG	1285	1139	Gemini 3.1 Pro Preview
Design Arena: ASCII art	1270	Not measured	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 1 board here

GeneralLike-for-likePublic boards, shown as published, kept out of the index281

General benchmarks for Gemini 3.1 Pro Preview and Qwen3.5 397B A17B
Benchmark	Gemini 3.1 Pro Preview	Qwen3.5 397B A17B	Leader
Public Benefits Bench (Vals AI)	53.8%	Not measured	Only Gemini 3.1 Pro Preview measured
SAGE (Vals AI)	48.7%	Not measured	Only Gemini 3.1 Pro Preview measured
MedScribe (Vals AI)	76.1%	Not measured	Only Gemini 3.1 Pro Preview measured
Vals Multimodal Index	56.1%	Not measured	Only Gemini 3.1 Pro Preview measured
IFBench	77.1%	78.8%	Qwen3.5 397B A17B
Long context reasoning (AA-LCR)	82.0%	77.3%	Gemini 3.1 Pro Preview
DTBench	97.1%	87.5%	Gemini 3.1 Pro Preview
LMCA	53.8%	37.9%	Gemini 3.1 Pro Preview
CL-bench	20.8%	Not measured	Only Gemini 3.1 Pro Preview measured
Furniture assembly	26.7%	Not measured	Only Gemini 3.1 Pro Preview measured
ExploitBench	26.1%	Not measured	Only Gemini 3.1 Pro Preview measured
CL-bench Life	16.9%	Not measured	Only Gemini 3.1 Pro Preview measured
LMArena Text	1480	1437	Gemini 3.1 Pro Preview
LMArena Text: instruction following	1466	1424	Gemini 3.1 Pro Preview
LMArena Text: creative writing	1482	1402	Gemini 3.1 Pro Preview
LMArena Vision	1296	1262	Gemini 3.1 Pro Preview
LMArena Text: English	1478	1443	Gemini 3.1 Pro Preview
LMArena Text: non-English	1476	1430	Gemini 3.1 Pro Preview
LMArena Text: Chinese	1527	1498	Gemini 3.1 Pro Preview
LMArena Text: German	1490	1445	Gemini 3.1 Pro Preview
LMArena Text: Japanese	1491	1429	Gemini 3.1 Pro Preview
LMArena Text: Korean	1455	1384	Gemini 3.1 Pro Preview
LMArena Text: French	1487	1462	Gemini 3.1 Pro Preview
LMArena Text: Spanish	1481	1441	Gemini 3.1 Pro Preview
LMArena Text: Russian	1497	1430	Gemini 3.1 Pro Preview
LMArena Text: Polish	1498	1447	Gemini 3.1 Pro Preview
LMArena Text: multi-turn	1487	1446	Gemini 3.1 Pro Preview
LMArena Text: longer queries	1482	1441	Gemini 3.1 Pro Preview
LMArena Text: writing and language	1481	1415	Gemini 3.1 Pro Preview
LMArena Text: entertainment and media	1465	1399	Gemini 3.1 Pro Preview
LMArena Vision: English	1287	1268	Gemini 3.1 Pro Preview
LMArena Vision: Chinese	1364	1314	Gemini 3.1 Pro Preview
LMArena Vision: reading text	1304	1271	Gemini 3.1 Pro Preview
LMArena Vision: humor	1322	1262	Gemini 3.1 Pro Preview
LMArena Vision: captioning	1345	1230	Gemini 3.1 Pro Preview
LMArena Vision: recognizing things	1330	1265	Gemini 3.1 Pro Preview
LMArena Vision: creative writing	1324	1260	Gemini 3.1 Pro Preview
LMArena Document	1444	Not measured	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 8 boards here

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

Image generation benchmarks for Gemini 3.1 Pro Preview and Qwen3.5 397B A17B
Benchmark	Gemini 3.1 Pro Preview	Qwen3.5 397B A17B	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

Gemini 3.1 Pro Preview$0.0080Fits in one request

Qwen3.5 397B A17B$0.0016Fits in one request

Qwen3.5 397B A17B costs less

Repository review

50K input + 3K output tokens

Gemini 3.1 Pro Preview$0.136Fits in one request

Qwen3.5 397B A17B$0.027Fits in one request

Qwen3.5 397B A17B costs less

Agent loop

200K input + 10K output tokens

Gemini 3.1 Pro Preview$0.520Fits in one request

Qwen3.5 397B A17B$0.101Fits in one request

Qwen3.5 397B A17B 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 Gemini 3.1 Pro Preview and Qwen3.5 397B A17B
Specification	Google Gemini 3.1 Pro Preview	Qwen3.5 397B A17B
Maker	Google	Qwen
Weights	No public weights listed	Open weights
Released	February 19, 2026	February 16, 2026
Context window	1.05M	262K
Input $/Mtok	$2.00	$0.39
Output $/Mtok	$12.00	$2.34
Coding index	32.3	Not benchmarked
Independent measurements behind it	4	1
Cost per solved task	$0.99	Not computable
Source	OpenRouter listing	OpenRouter listing

Questions

Is Gemini 3.1 Pro Preview better than Qwen3.5 397B A17B for coding?

Only Gemini 3.1 Pro Preview has a coding score, 32.3 on the Vibe Coding Index; Qwen3.5 397B A17B has none, so the two cannot be ranked on coding. Pick Qwen3.5 397B A17B for output tokens 5.1x cheaper ($2.34 vs $12.00 per million) and work measured by IFBench, where it leads.

Which is cheaper, Gemini 3.1 Pro Preview or Qwen3.5 397B A17B?

Gemini 3.1 Pro Preview costs $2.00 per million input tokens and $12.00 per million output tokens; Qwen3.5 397B A17B costs $0.39 and $2.34. Cost per solved task is known for Gemini 3.1 Pro Preview only.

Which has the bigger context window, Gemini 3.1 Pro Preview or Qwen3.5 397B A17B?

Gemini 3.1 Pro Preview, with 1.05M tokens against 262K.

How many benchmarks is the Gemini 3.1 Pro Preview vs Qwen3.5 397B A17B comparison based on?

64 benchmarks have a result for both models as of October 22, 2026. Gemini 3.1 Pro Preview's coding index rests on 4 independent benchmarks and Qwen3.5 397B A17B's on 1. Where only one model has a result, the page says so instead of naming a winner.

Gemini 3.1 Pro Preview or Qwen3.5 397B A17B: 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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