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Gemini 4 Carbon vs Qwen3.8 27B

Gemini 4 Carbon leads Qwen3.8 27B on coding, 86.6 to 69.7 on the Vibe Coding Index, and Qwen3.8 27B costs 3.9x less per output token ($2.55 vs $10.00 per million). Updated November 14, 2026; 47 benchmarks have a result for both.

Replace Gemini 4 Carbon Replace Qwen3.8 27B
Gemini 4 CarbonGoogle
Coding
86.6
Overall
88.3
Output $/M
$10.00
46
Qwen3.8 27BQwen
Coding
69.7
Overall
54.1
Output $/M
$2.55
1
vs boards won of 47 shared

Gemini 4 Carbon or Qwen3.8 27B: which to pick

Pick Gemini 4 Carbon for coding: it scores 86.6 on the Vibe Coding Index against 69.7 for Qwen3.8 27B.

Pick Qwen3.8 27B for output tokens 3.9x cheaper ($2.55 vs $10.00 per million) and work measured by Long context reasoning (AA-LCR), where it leads.

Model AGemini 4 CarbonGoogle86.6/1004 independent benchmarksNo cost per solved taskModel BQwen3.8 27BQwen69.7/1004 independent benchmarks$1.26 per solved task
Shared results
47
Gemini 4 Carbon only
26
Qwen3.8 27B only
46
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.

At a glance

Coding index
Gemini 4 Carbon 86.6 from 4 benchmarks, Qwen3.8 27B 69.7 from 4 benchmarks.
Widest category
Agentic work, 36.9 points apart on average over 6 shared benchmarks.
Widest single gap
Terminal-Bench 4.0 (Artificial Analysis run): Gemini 4 Carbon 65.2% against Qwen3.8 27B 5.6%, 59.6 points apart on a 0 to 100 scale.
Output price
Gemini 4 Carbon $10.00 against Qwen3.8 27B $2.55 per million output tokens, 3.9x apart.
Context window
Gemini 4 Carbon takes 1.05M tokens, Qwen3.8 27B 1.02M.

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
CategoryGemini 4 CarbonBarsQwen3.8 27BTies
Coding90
Intelligence20
Agentic work60
Reasoning90
Math10
Knowledge50
Web design10
General131
All shared boards461
CodingLike-for-likeSix of these boards feed the Vibe Coding Index90
Coding benchmarks for Gemini 4 Carbon and Qwen3.8 27B
BenchmarkGemini 4 CarbonQwen3.8 27BLeader
LiveBench coding91.0%69.3%Gemini 4 Carbon
LMArena WebDev17681590Gemini 4 Carbon
AA Coding IndexNot measured68.1Only Qwen3.8 27B measured
LiveCodeBench (Vals AI)Not measured84.0%Only Qwen3.8 27B measured
SWE-bench Verified (Vals AI)Not measured86.0%Only Qwen3.8 27B measured
Terminal-Bench 4 (Vals AI)63.1%Not measuredOnly Gemini 4 Carbon measured
Vibe Code Bench (Vals AI)89.1%64.8%Gemini 4 Carbon
Code migration (Vals AI)Not measured14.2%Only Qwen3.8 27B measured
ProgramBench (Vals AI)Not measured0.0%Only Qwen3.8 27B measured
IOI (Vals AI)Not measured39.1%Only Qwen3.8 27B measured
Terminal-Bench 2.1 (Vals AI)Not measured58.4%Only Qwen3.8 27B measured
SkillsBench (Vals AI)Not measured38.1%Only Qwen3.8 27B measured
CyberBench (Vals AI)Not measured67.8%Only Qwen3.8 27B measured
SciCodeNot measured46.6%Only Qwen3.8 27B measured
Terminal-Bench 4.0 (Artificial Analysis run)65.2%5.6%Gemini 4 Carbon
FrontierCode 2.040.6%14.9%Gemini 4 Carbon
FrontierSWE61.2%Not measuredOnly Gemini 4 Carbon measured
ALE-Bench2374.7Not measuredOnly Gemini 4 Carbon measured
LMArena Text: coding15641479Gemini 4 Carbon
LMArena Text: software and IT15521474Gemini 4 Carbon
LMArena WebDev: React17921596Gemini 4 Carbon
LMArena WebDev: HTML17701570Gemini 4 Carbon
LMArena WebDev: from an imageNot measured1574Only Qwen3.8 27B measured
GameBench 2Not measured43.8Only Qwen3.8 27B measured
CursorBench 4.060.4%Not measuredOnly Gemini 4 Carbon measured
Neither model has a result on the other 27 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Gemini 4 Carbon and Qwen3.8 27B
BenchmarkGemini 4 CarbonQwen3.8 27BLeader
AA Intelligence Index60.020.1Gemini 4 Carbon
Epoch Capabilities Index169.8152.6Gemini 4 Carbon
Agentic workLike-for-likePublic boards, shown as published, kept out of the index60
Agentic work benchmarks for Gemini 4 Carbon and Qwen3.8 27B
BenchmarkGemini 4 CarbonQwen3.8 27BLeader
AA Agentic IndexNot measured45.8Only Qwen3.8 27B measured
Design Arena: agents building mobile apps1284Not measuredOnly Gemini 4 Carbon measured
Design Arena: spreadsheets1224Not measuredOnly Gemini 4 Carbon measured
LiveBench research92.5%61.3%Gemini 4 Carbon
LiveBench browser80.0%24.2%Gemini 4 Carbon
LiveBench long agentic72.7%15.9%Gemini 4 Carbon
Finance Agent (Vals AI)Not measured48.5%Only Qwen3.8 27B measured
Tax Agent Bench (Vals AI)51.8%30.9%Gemini 4 Carbon
Legal Research Bench (Vals AI)55.8%36.1%Gemini 4 Carbon
Harvey's Legal Agent Benchmark (Vals AI)17.5%Not measuredOnly Gemini 4 Carbon measured
Excel Modeling Benchmark (Vals AI)Not measured59.7%Only Qwen3.8 27B measured
Terminal-Bench-Science (Vals AI)Not measured0.0%Only Qwen3.8 27B measured
APEX-Agents84.2%47.5%Gemini 4 Carbon
Vending-Bench 2$16,484Not measuredOnly Gemini 4 Carbon measured
Neither model has a result on the other 30 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index90
Reasoning benchmarks for Gemini 4 Carbon and Qwen3.8 27B
BenchmarkGemini 4 CarbonQwen3.8 27BLeader
GPQA DiamondNot measured88.9%Only Qwen3.8 27B measured
LiveBench reasoning90.6%80.0%Gemini 4 Carbon
MMMU Pro (Vals AI)Not measured83.9%Only Qwen3.8 27B measured
GPQA Diamond (Artificial Analysis run)Not measured90.5%Only Qwen3.8 27B measured
Humanity's Last Exam (Artificial Analysis run)Not measured33.9%Only Qwen3.8 27B measured
HLE-Diamond (Artificial Analysis run)69.1%15.3%Gemini 4 Carbon
CritPt v2, hard subset (Artificial Analysis run)69.0%16.5%Gemini 4 Carbon
GPQA Diamond (Epoch AI run)96.5%Not measuredOnly Gemini 4 Carbon measured
ARC-AGI98.5%87.5%Gemini 4 Carbon
ARC-AGI-294.2%42.4%Gemini 4 Carbon
SimpleBench92.6%60.2%Gemini 4 Carbon
Chess puzzles78.0%Not measuredOnly Gemini 4 Carbon measured
Mystery game puzzles73.0%Not measuredOnly Gemini 4 Carbon measured
EBR-bench87.6%Not measuredOnly Gemini 4 Carbon measured
LMArena Text: hard prompts15511456Gemini 4 Carbon
LMArena Text: expert15821479Gemini 4 Carbon
LMArena Text: hard prompts in English15451462Gemini 4 Carbon
LMArena Vision: diagramsNot measured1281Only Qwen3.8 27B measured
LMArena Vision: homeworkNot measured1284Only Qwen3.8 27B measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index10
Math benchmarks for Gemini 4 Carbon and Qwen3.8 27B
BenchmarkGemini 4 CarbonQwen3.8 27BLeader
OTIS Mock AIME100.0%Not measuredOnly Gemini 4 Carbon measured
FrontierMath, tiers 1 to 390.5%Not measuredOnly Gemini 4 Carbon measured
FrontierMath, tier 495.1%Not measuredOnly Gemini 4 Carbon measured
ProofBenchNot measured16.0%Only Qwen3.8 27B measured
LMArena Text: mathNot measured1455Only Qwen3.8 27B measured
LMArena Text: mathematical work15381461Gemini 4 Carbon
MathArena85.4%Not measuredOnly Gemini 4 Carbon measured
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index50
Knowledge benchmarks for Gemini 4 Carbon and Qwen3.8 27B
BenchmarkGemini 4 CarbonQwen3.8 27BLeader
MMLU ProNot measured84.3%Only Qwen3.8 27B measured
LegalBench (Vals AI)Not measured82.4%Only Qwen3.8 27B measured
TaxEval (Vals AI)Not measured70.8%Only Qwen3.8 27B measured
MortgageTax (Vals AI)Not measured64.9%Only Qwen3.8 27B measured
MedCode (Vals AI)Not measured28.7%Only Qwen3.8 27B measured
AA-Omniscience53.5-6.4Gemini 4 Carbon
SimpleQA Verified77.7%Not measuredOnly Gemini 4 Carbon measured
GeoBenchNot measured38.0%Only Qwen3.8 27B measured
LMArena Text: science15351463Gemini 4 Carbon
LMArena Text: medicine and healthcare15251439Gemini 4 Carbon
LMArena Text: legal and government15421446Gemini 4 Carbon
LMArena Text: business and finance15201440Gemini 4 Carbon
FACTS Benchmark Suite78.4%Not measuredOnly Gemini 4 Carbon measured
PRBench Legal53.3%Not measuredOnly Gemini 4 Carbon measured
Neither model has a result on the other 7 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index10
Web design benchmarks for Gemini 4 Carbon and Qwen3.8 27B
BenchmarkGemini 4 CarbonQwen3.8 27BLeader
Design Arena: websites1319Not measuredOnly Gemini 4 Carbon measured
Design Arena: UI components1357Not measuredOnly Gemini 4 Carbon measured
Design Arena: game dev1326Not measuredOnly Gemini 4 Carbon measured
Design Arena: 3D1434Not measuredOnly Gemini 4 Carbon measured
Design Arena: all code categories1348Not measuredOnly Gemini 4 Carbon measured
LiveBench design80.2%72.4%Gemini 4 Carbon
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index131
General benchmarks for Gemini 4 Carbon and Qwen3.8 27B
BenchmarkGemini 4 CarbonQwen3.8 27BLeader
Vals Index70.5%Not measuredOnly Gemini 4 Carbon measured
LiveBench data analysis86.5%76.6%Gemini 4 Carbon
MedScribe (Vals AI)Not measured83.8%Only Qwen3.8 27B measured
Long context reasoning (AA-LCR)79.3%82.0%Qwen3.8 27B
GDPval-AA17331426Gemini 4 Carbon
DTBenchNot measured88.0%Only Qwen3.8 27B measured
LMCANot measured41.4%Only Qwen3.8 27B measured
Surface Evolver BenchNot measured45.0%Only Qwen3.8 27B measured
Furniture assembly77.5%Not measuredOnly Gemini 4 Carbon measured
LMArena Text15381437Gemini 4 Carbon
LMArena Text: instruction following15391431Gemini 4 Carbon
LMArena Text: creative writing15331377Gemini 4 Carbon
LMArena VisionNot measured1270Only Qwen3.8 27B measured
LMArena Text: English15301447Gemini 4 Carbon
LMArena Text: non-English15341424Gemini 4 Carbon
LMArena Text: Chinese16131493Gemini 4 Carbon
LMArena Text: GermanNot measured1436Only Qwen3.8 27B measured
LMArena Text: JapaneseNot measured1398Only Qwen3.8 27B measured
LMArena Text: KoreanNot measured1389Only Qwen3.8 27B measured
LMArena Text: FrenchNot measured1466Only Qwen3.8 27B measured
LMArena Text: SpanishNot measured1443Only Qwen3.8 27B measured
LMArena Text: Russian15601408Gemini 4 Carbon
LMArena Text: PolishNot measured1441Only Qwen3.8 27B measured
LMArena Text: multi-turn15691436Gemini 4 Carbon
LMArena Text: longer queries15491446Gemini 4 Carbon
LMArena Text: writing and language15421401Gemini 4 Carbon
LMArena Text: entertainment and media15271388Gemini 4 Carbon
LMArena Vision: EnglishNot measured1272Only Qwen3.8 27B measured
LMArena Vision: ChineseNot measured1327Only Qwen3.8 27B measured
LMArena Vision: reading textNot measured1280Only Qwen3.8 27B measured
LMArena Vision: humorNot measured1245Only Qwen3.8 27B measured
LMArena Vision: creative writingNot measured1234Only Qwen3.8 27B measured
Neither model has a result on the other 17 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Gemini 4 Carbon and Qwen3.8 27B
BenchmarkGemini 4 CarbonQwen3.8 27BLeader
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 4 Carbon$0.0070Fits in one request
Qwen3.8 27B$0.0017Fits in one request

Qwen3.8 27B costs less

Repository review

50K input + 3K output tokens

Gemini 4 Carbon$0.130Fits in one request
Qwen3.8 27B$0.029Fits in one request

Qwen3.8 27B costs less

Agent loop

200K input + 10K output tokens

Gemini 4 Carbon$0.500Fits in one request
Qwen3.8 27B$0.111Fits in one request

Qwen3.8 27B 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 4 Carbon and Qwen3.8 27B
SpecificationGoogle Gemini 4 CarbonQwen3.8 27B
MakerGoogleQwen
WeightsNo public weights listedOpen weights
ReleasedNovember 10, 2026August 14, 2026
Context window1.05M1.02M
Input $/Mtok$2.00$0.425
Output $/Mtok$10.00$2.55
Coding index86.669.7
Independent measurements behind it44
Cost per solved taskNot computable$1.26
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 4 Carbon better than Qwen3.8 27B for coding?

Pick Gemini 4 Carbon for coding: it scores 86.6 on the Vibe Coding Index against 69.7 for Qwen3.8 27B. Pick Qwen3.8 27B for output tokens 3.9x cheaper ($2.55 vs $10.00 per million) and work measured by Long context reasoning (AA-LCR), where it leads.

Which is cheaper, Gemini 4 Carbon or Qwen3.8 27B?

Gemini 4 Carbon costs $2.00 per million input tokens and $10.00 per million output tokens; Qwen3.8 27B costs $0.425 and $2.55. Cost per solved task is known for Qwen3.8 27B only.

Which has the bigger context window, Gemini 4 Carbon or Qwen3.8 27B?

Gemini 4 Carbon, with 1.05M tokens against 1.02M.

How many benchmarks is the Gemini 4 Carbon vs Qwen3.8 27B comparison based on?

47 benchmarks have a result for both models as of November 14, 2026. Gemini 4 Carbon's coding index rests on 4 independent benchmarks and Qwen3.8 27B's on 4. Where only one model has a result, the page says so instead of naming a winner.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gemini-4-carbon-vs-qwen3-8-27b">LLMBenchmark.ai, Gemini 4 Carbon vs Qwen3.8 27B</a></p>