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Gemini 4 Carbon vs GPT-6 Sol

Gemini 4 Carbon leads GPT-6 Sol on coding, 86.6 to 72.1 on the Vibe Coding Index, at about the same output price ($10.00 vs $10.00 per million). Updated November 14, 2026; 62 benchmarks have a result for both.

Replace Gemini 4 Carbon Replace GPT-6 Sol
Gemini 4 CarbonGoogle
Coding
86.6
Overall
88.3
Output $/M
$10.00
59
GPT-6 SolOpenAI
Coding
72.1
Overall
73.6
Output $/M
$10.00
2
vs boards won of 62 shared, 1 tied

Gemini 4 Carbon or GPT-6 Sol: which to pick

Pick Gemini 4 Carbon for coding: it scores 86.6 on the Vibe Coding Index against 72.1 for GPT-6 Sol.

Pick GPT-6 Sol for a larger context window (1.05M against 1.05M tokens) and work measured by ALE-Bench or Long context reasoning (AA-LCR), where it leads.

Model AGemini 4 CarbonGoogle86.6/1004 independent benchmarksNo cost per solved taskModel BGPT-6 SolOpenAI72.1/1004 independent benchmarksNo cost per solved task
Shared results
62
Gemini 4 Carbon only
11
GPT-6 Sol only
50
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, GPT-6 Sol 72.1 from 4 benchmarks.
Widest category
Agentic work, 25.4 points apart on average over 6 shared benchmarks.
Widest single gap
Design Arena: spreadsheets: Gemini 4 Carbon 1224 against GPT-6 Sol 922, 37.8 points apart on a 0 to 100 scale.
Output price
Both cost $10.00 per million output tokens.
Context window
Gemini 4 Carbon takes 1.05M tokens, GPT-6 Sol 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
CategoryGemini 4 CarbonBarsGPT-6 SolTies
Coding91
Intelligence20
Agentic work60
Reasoning120
Math401 tie
Knowledge80
Web design50
General131
All shared boards5921 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index91
Coding benchmarks for Gemini 4 Carbon and GPT-6 Sol
BenchmarkGemini 4 CarbonGPT-6 SolLeader
LiveBench coding91.0%Not measuredOnly Gemini 4 Carbon measured
LMArena WebDev17681673Gemini 4 Carbon
Terminal-Bench 4 (Vals AI)63.1%44.4%Gemini 4 Carbon
Vibe Code Bench (Vals AI)89.1%87.8%Gemini 4 Carbon
Code migration (Vals AI)Not measured57.2%Only GPT-6 Sol measured
ProgramBench (Vals AI)Not measured2.0%Only GPT-6 Sol measured
IOI (Vals AI)Not measured82.6%Only GPT-6 Sol measured
Terminal-Bench 2.1 (Vals AI)Not measured83.2%Only GPT-6 Sol measured
CyberBench (Vals AI)Not measured78.0%Only GPT-6 Sol measured
SciCodeNot measured57.6%Only GPT-6 Sol measured
Terminal-Bench 4.0 (Artificial Analysis run)65.2%43.9%Gemini 4 Carbon
FrontierCode 2.040.6%35.6%Gemini 4 Carbon
FrontierCodeNot measured49.3%Only GPT-6 Sol measured
FrontierSWE61.2%Not measuredOnly Gemini 4 Carbon measured
MirrorCodeNot measured48.9%Only GPT-6 Sol measured
ALE-Bench2374.72462.0GPT-6 Sol
LMArena Text: coding15641449Gemini 4 Carbon
LMArena Text: software and IT15521434Gemini 4 Carbon
LMArena WebDev: React17921675Gemini 4 Carbon
LMArena WebDev: HTML17701684Gemini 4 Carbon
LMArena WebDev: from an imageNot measured1655Only GPT-6 Sol measured
GameBench 2Not measured79.4Only GPT-6 Sol measured
Terminal-Bench 4.0Not measured49.4%Only GPT-6 Sol measured
CursorBench 4.060.4%Not measuredOnly Gemini 4 Carbon measured
Neither model has a result on the other 28 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Gemini 4 Carbon and GPT-6 Sol
BenchmarkGemini 4 CarbonGPT-6 SolLeader
AA Intelligence Index60.044.2Gemini 4 Carbon
Epoch Capabilities Index169.8163.8Gemini 4 Carbon
Agentic workLike-for-likePublic boards, shown as published, kept out of the index60
Agentic work benchmarks for Gemini 4 Carbon and GPT-6 Sol
BenchmarkGemini 4 CarbonGPT-6 SolLeader
Design Arena: agents building web appsNot measured1214Only GPT-6 Sol measured
Design Arena: agents building full-stack appsNot measured1209Only GPT-6 Sol measured
Design Arena: agents building mobile apps12841193Gemini 4 Carbon
Design Arena: agents building Android appsNot measured1169Only GPT-6 Sol measured
Design Arena: spreadsheets1224922Gemini 4 Carbon
LiveBench research92.5%Not measuredOnly Gemini 4 Carbon measured
LiveBench browser80.0%Not measuredOnly Gemini 4 Carbon measured
LiveBench long agentic72.7%Not measuredOnly Gemini 4 Carbon measured
SREBench (Vals AI)Not measured30.5%Only GPT-6 Sol measured
Finance Agent (Vals AI)Not measured49.0%Only GPT-6 Sol measured
Tax Agent Bench (Vals AI)51.8%15.0%Gemini 4 Carbon
Legal Research Bench (Vals AI)55.8%28.9%Gemini 4 Carbon
Harvey's Legal Agent Benchmark (Vals AI)17.5%Not measuredOnly Gemini 4 Carbon measured
Excel Modeling Benchmark (Vals AI)Not measured71.5%Only GPT-6 Sol measured
BioMysteryBench (Vals AI)Not measured74.8%Only GPT-6 Sol measured
Terminal-Bench-Science (Vals AI)Not measured30.0%Only GPT-6 Sol measured
Vals Science IndexNot measured45.0%Only GPT-6 Sol measured
APEX-Agents84.2%54.3%Gemini 4 Carbon
SpireClimbNot measured9.2%Only GPT-6 Sol measured
Vending-Bench 2$16,484$14,428Gemini 4 Carbon
LMArena SearchNot measured1174Only GPT-6 Sol measured
Neither model has a result on the other 23 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index120
Reasoning benchmarks for Gemini 4 Carbon and GPT-6 Sol
BenchmarkGemini 4 CarbonGPT-6 SolLeader
LiveBench reasoning90.6%Not measuredOnly Gemini 4 Carbon measured
MysteryMechanism (Vals AI)Not measured30.2%Only GPT-6 Sol measured
Humanity's Last Exam (Artificial Analysis run)Not measured47.9%Only GPT-6 Sol measured
HLE-Diamond (Artificial Analysis run)69.1%45.2%Gemini 4 Carbon
CritPt v2, hard subset (Artificial Analysis run)69.0%66.5%Gemini 4 Carbon
GPQA Diamond (Epoch AI run)96.5%94.3%Gemini 4 Carbon
ARC-AGI98.5%95.5%Gemini 4 Carbon
ARC-AGI-294.2%89.6%Gemini 4 Carbon
SimpleBench92.6%73.1%Gemini 4 Carbon
Chess puzzles78.0%56.0%Gemini 4 Carbon
Mystery game puzzles73.0%56.0%Gemini 4 Carbon
EBR-bench87.6%53.3%Gemini 4 Carbon
LMArena Text: hard prompts15511419Gemini 4 Carbon
LMArena Text: expert15821439Gemini 4 Carbon
LMArena Text: hard prompts in English15451418Gemini 4 Carbon
LMArena Vision: diagramsNot measured1264Only GPT-6 Sol measured
LMArena Vision: homeworkNot measured1290Only GPT-6 Sol measured
Humanity's Last Exam (Scale run)Not measured33.8%Only GPT-6 Sol measured
GoBenchNot measured2005Only GPT-6 Sol measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for Gemini 4 Carbon and GPT-6 Sol
BenchmarkGemini 4 CarbonGPT-6 SolLeader
OTIS Mock AIME100.0%100.0%Tie
FrontierMath, tiers 1 to 390.5%89.8%Gemini 4 Carbon
FrontierMath, tier 495.1%90.0%Gemini 4 Carbon
ProofBenchNot measured83.0%Only GPT-6 Sol measured
LMArena Text: mathNot measured1396Only GPT-6 Sol measured
LMArena Text: mathematical work15381414Gemini 4 Carbon
MathArena85.4%75.9%Gemini 4 Carbon
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index80
Knowledge benchmarks for Gemini 4 Carbon and GPT-6 Sol
BenchmarkGemini 4 CarbonGPT-6 SolLeader
MedCode (Vals AI)Not measured47.1%Only GPT-6 Sol measured
AA-Omniscience53.521.4Gemini 4 Carbon
SimpleQA Verified77.7%60.7%Gemini 4 Carbon
LMArena Text: science15351386Gemini 4 Carbon
LMArena Text: medicine and healthcare15251366Gemini 4 Carbon
LMArena Text: legal and government15421400Gemini 4 Carbon
LMArena Text: business and finance15201383Gemini 4 Carbon
FACTS Benchmark Suite78.4%74.0%Gemini 4 Carbon
PRBench Legal53.3%38.6%Gemini 4 Carbon
Neither model has a result on the other 12 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index50
Web design benchmarks for Gemini 4 Carbon and GPT-6 Sol
BenchmarkGemini 4 CarbonGPT-6 SolLeader
Design Arena: websites13191291Gemini 4 Carbon
Design Arena: UI components13571286Gemini 4 Carbon
Design Arena: game dev13261305Gemini 4 Carbon
Design Arena: data vizNot measured1273Only GPT-6 Sol measured
Design Arena: 3D14341299Gemini 4 Carbon
Design Arena: all code categories13481295Gemini 4 Carbon
Design Arena: SVGNot measured1299Only GPT-6 Sol measured
Design Arena: ASCII artNot measured1219Only GPT-6 Sol measured
LiveBench design80.2%Not measuredOnly Gemini 4 Carbon measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index131
General benchmarks for Gemini 4 Carbon and GPT-6 Sol
BenchmarkGemini 4 CarbonGPT-6 SolLeader
Vals Index70.5%Not measuredOnly Gemini 4 Carbon measured
LiveBench data analysis86.5%Not measuredOnly Gemini 4 Carbon measured
Public Benefits Bench (Vals AI)Not measured56.6%Only GPT-6 Sol measured
MedScribe (Vals AI)Not measured82.0%Only GPT-6 Sol measured
Long context reasoning (AA-LCR)79.3%83.7%GPT-6 Sol
GDPval-AA17331514Gemini 4 Carbon
DTBenchNot measured97.3%Only GPT-6 Sol measured
LMCANot measured59.1%Only GPT-6 Sol measured
Furniture assembly77.5%58.3%Gemini 4 Carbon
LMArena Text15381397Gemini 4 Carbon
LMArena Text: instruction following15391410Gemini 4 Carbon
LMArena Text: creative writing15331370Gemini 4 Carbon
LMArena VisionNot measured1233Only GPT-6 Sol measured
LMArena Text: English15301397Gemini 4 Carbon
LMArena Text: non-English15341387Gemini 4 Carbon
LMArena Text: Chinese16131405Gemini 4 Carbon
LMArena Text: GermanNot measured1382Only GPT-6 Sol measured
LMArena Text: JapaneseNot measured1348Only GPT-6 Sol measured
LMArena Text: KoreanNot measured1343Only GPT-6 Sol measured
LMArena Text: FrenchNot measured1403Only GPT-6 Sol measured
LMArena Text: SpanishNot measured1390Only GPT-6 Sol measured
LMArena Text: Russian15601408Gemini 4 Carbon
LMArena Text: PolishNot measured1397Only GPT-6 Sol measured
LMArena Text: multi-turn15691414Gemini 4 Carbon
LMArena Text: longer queries15491415Gemini 4 Carbon
LMArena Text: writing and language15421387Gemini 4 Carbon
LMArena Text: entertainment and media15271367Gemini 4 Carbon
LMArena Vision: EnglishNot measured1226Only GPT-6 Sol measured
LMArena Vision: ChineseNot measured1271Only GPT-6 Sol measured
LMArena Vision: reading textNot measured1251Only GPT-6 Sol measured
LMArena Vision: humorNot measured1179Only GPT-6 Sol measured
LMArena Vision: creative writingNot measured1197Only GPT-6 Sol 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 GPT-6 Sol
BenchmarkGemini 4 CarbonGPT-6 SolLeader
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
GPT-6 Sol$0.0070Fits in one request

Same cost

Repository review

50K input + 3K output tokens

Gemini 4 Carbon$0.130Fits in one request
GPT-6 Sol$0.130Fits in one request

Same cost

Agent loop

200K input + 10K output tokens

Gemini 4 Carbon$0.500Fits in one request
GPT-6 Sol$0.500Fits in one request

Same cost

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 GPT-6 Sol
SpecificationGoogle Gemini 4 CarbonOpenAI GPT-6 Sol
MakerGoogleOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedNovember 10, 2026September 22, 2026
Context window1.05M1.05M
Input $/Mtok$2.00$2.00
Output $/Mtok$10.00$10.00
Coding index86.672.1
Independent measurements behind it44
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 4 Carbon better than GPT-6 Sol for coding?

Pick Gemini 4 Carbon for coding: it scores 86.6 on the Vibe Coding Index against 72.1 for GPT-6 Sol. Pick GPT-6 Sol for a larger context window (1.05M against 1.05M tokens) and work measured by ALE-Bench or Long context reasoning (AA-LCR), where it leads.

Which is cheaper, Gemini 4 Carbon or GPT-6 Sol?

Gemini 4 Carbon costs $2.00 per million input tokens and $10.00 per million output tokens; GPT-6 Sol costs $2.00 and $10.00. Cost per solved task is known for neither of them.

Which has the bigger context window, Gemini 4 Carbon or GPT-6 Sol?

GPT-6 Sol, with 1.05M tokens against 1.05M.

How many benchmarks is the Gemini 4 Carbon vs GPT-6 Sol comparison based on?

62 benchmarks have a result for both models as of November 14, 2026. Gemini 4 Carbon's coding index rests on 4 independent benchmarks and GPT-6 Sol's on 4. Where only one model has a result, the page says so instead of naming a winner.

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<iframe src="https://llmbenchmark.ai/embed/compare/gemini-4-carbon-vs-gpt-6-sol" title="Gemini 4 Carbon vs GPT-6 Sol, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gemini-4-carbon-vs-gpt-6-sol">LLMBenchmark.ai, Gemini 4 Carbon vs GPT-6 Sol</a></p>