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Gemini 4 Argon vs GPT-5.5

Gemini 4 Argon leads GPT-5.5 on coding, 81.0 to 71.3 on the Vibe Coding Index, and Gemini 4 Argon costs 3.0x less per output token ($10.00 vs $30.00 per million). Updated October 21, 2026; 77 benchmarks have a result for both.

Replace Gemini 4 Argon Replace GPT-5.5
Gemini 4 ArgonGoogle
Coding
81.0
Overall
84.0
Output $/M
$10.00
74
GPT-5.5OpenAI
Coding
71.3
Overall
69.2
Output $/M
$30.00
3
vs boards won of 77 shared

Gemini 4 Argon or GPT-5.5: which to pick

Pick Gemini 4 Argon for coding: it scores 81.0 on the Vibe Coding Index against 71.3 for GPT-5.5.

Pick GPT-5.5 for a larger context window (1.05M against 1.05M tokens) and work measured by Terminal-Bench 2.1 (Vals AI) or Chess puzzles, where it leads.

Model AGemini 4 ArgonGoogle81.0/1005 independent benchmarksNo cost per solved taskModel BGPT-5.5OpenAI71.3/1005 independent benchmarks$1.65 per solved task
Shared results
77
Gemini 4 Argon only
16
GPT-5.5 only
57
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 Argon 81.0 from 5 benchmarks, GPT-5.5 71.3 from 5 benchmarks.
Widest category
Agentic work, 27.5 points apart on average over 11 shared benchmarks.
Widest single gap
ProofBench: Gemini 4 Argon 99.0% against GPT-5.5 50.0%, 49.0 points apart on a 0 to 100 scale.
Output price
Gemini 4 Argon $10.00 against GPT-5.5 $30.00 per million output tokens, 3.0x apart.
Context window
Gemini 4 Argon takes 1.05M tokens, GPT-5.5 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 ArgonBarsGPT-5.5Ties
Coding121
Intelligence20
Agentic work110
Reasoning101
Math60
Knowledge70
Web design70
General191
All shared boards743
CodingLike-for-likeSix of these boards feed the Vibe Coding Index121
Coding benchmarks for Gemini 4 Argon and GPT-5.5
BenchmarkGemini 4 ArgonGPT-5.5Leader
LiveBench coding89.7%85.1%Gemini 4 Argon
LMArena WebDev16781513Gemini 4 Argon
AA Coding IndexNot measured74.9Only GPT-5.5 measured
LiveCodeBench (Vals AI)Not measured85.3%Only GPT-5.5 measured
SWE-bench Verified (Vals AI)Not measured82.6%Only GPT-5.5 measured
Terminal-Bench 4 (Vals AI)57.6%Not measuredOnly Gemini 4 Argon measured
Vibe Code Bench (Vals AI)91.9%69.8%Gemini 4 Argon
Code migration (Vals AI)68.2%45.2%Gemini 4 Argon
ProgramBench (Vals AI)2.5%0.5%Gemini 4 Argon
IOI (Vals AI)100.0%Not measuredOnly Gemini 4 Argon measured
Terminal-Bench 2.1 (Vals AI)57.7%76.4%GPT-5.5
SWE-bench Multimodal (Vals AI)56.0%Not measuredOnly Gemini 4 Argon measured
Vibe Code Bench 1-100 (Vals AI)21.2%Not measuredOnly Gemini 4 Argon measured
SkillsBench (Vals AI)Not measured62.5%Only GPT-5.5 measured
CyberBench (Vals AI)77.9%Not measuredOnly Gemini 4 Argon measured
SciCode61.8%56.1%Gemini 4 Argon
Terminal-Bench Hard (Artificial Analysis run)Not measured60.6%Only GPT-5.5 measured
Terminal-BenchNot measured84.7%Only GPT-5.5 measured
FrontierCode47.5%43.0%Gemini 4 Argon
FrontierSWE55.0%Not measuredOnly Gemini 4 Argon measured
GSO-BenchNot measured40.2%Only GPT-5.5 measured
WeirdMLNot measured84.9%Only GPT-5.5 measured
MirrorCodeNot measured10.0%Only GPT-5.5 measured
ALE-Bench2100.11943.0Gemini 4 Argon
LMArena Text: coding15461494Gemini 4 Argon
LMArena Text: software and IT15561493Gemini 4 Argon
LMArena WebDev: React16921506Gemini 4 Argon
LMArena WebDev: HTML16431543Gemini 4 Argon
LMArena WebDev: from an imageNot measured1532Only GPT-5.5 measured
SciCode12.3%Not measuredOnly Gemini 4 Argon measured
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 Gemini 4 Argon and GPT-5.5
BenchmarkGemini 4 ArgonGPT-5.5Leader
AA Intelligence Index52.638.4Gemini 4 Argon
Epoch Capabilities Index166.4159.7Gemini 4 Argon
Agentic workLike-for-likePublic boards, shown as published, kept out of the index110
Agentic work benchmarks for Gemini 4 Argon and GPT-5.5
BenchmarkGemini 4 ArgonGPT-5.5Leader
AA Agentic IndexNot measured36.4Only GPT-5.5 measured
Design Arena: agents building web appsNot measured1117Only GPT-5.5 measured
Design Arena: agents building full-stack appsNot measured1089Only GPT-5.5 measured
Design Arena: agents building mobile appsNot measured1143Only GPT-5.5 measured
Design Arena: agents building Android appsNot measured1163Only GPT-5.5 measured
Design Arena: agents building Godot gamesNot measured1173Only GPT-5.5 measured
Design Arena: agents building gamesNot measured1179Only GPT-5.5 measured
Design Arena: HTML slidesNot measured1067Only GPT-5.5 measured
Design Arena: PowerPoint slidesNot measured1109Only GPT-5.5 measured
Design Arena: spreadsheets1142Not measuredOnly Gemini 4 Argon measured
LiveBench research83.1%61.6%Gemini 4 Argon
LiveBench browser92.0%48.0%Gemini 4 Argon
LiveBench long agentic69.9%44.6%Gemini 4 Argon
SREBench (Vals AI)44.3%3.8%Gemini 4 Argon
Finance Agent (Vals AI)65.4%51.8%Gemini 4 Argon
Tax Agent Bench (Vals AI)44.6%21.8%Gemini 4 Argon
Legal Research Bench (Vals AI)54.8%40.4%Gemini 4 Argon
Harvey's Legal Agent Benchmark (Vals AI)27.1%Not measuredOnly Gemini 4 Argon measured
Excel Modeling Benchmark (Vals AI)75.2%64.5%Gemini 4 Argon
BioMysteryBench (Vals AI)76.3%Not measuredOnly Gemini 4 Argon measured
Terminal-Bench-Science (Vals AI)44.3%Not measuredOnly Gemini 4 Argon measured
Vals Science Index55.4%Not measuredOnly Gemini 4 Argon measured
Time Horizon Index (Vals AI)52.5%8.3%Gemini 4 Argon
CUA-bench (Vals AI)4.8%Not measuredOnly Gemini 4 Argon measured
Robo-bench (Vals AI)0.8%Not measuredOnly Gemini 4 Argon measured
τ²-Bench TelecomNot measured93.9%Only GPT-5.5 measured
APEX-Agents82.4%55.1%Gemini 4 Argon
Remote Labor IndexNot measured6.3%Only GPT-5.5 measured
OSWorld 2.0Not measured13.0%Only GPT-5.5 measured
DeepResearch BenchNot measured54.0%Only GPT-5.5 measured
PostTrainBenchNot measured27.2%Only GPT-5.5 measured
Vending-Bench 2$13,718$7,524Gemini 4 Argon
Neither model has a result on the other 9 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index101
Reasoning benchmarks for Gemini 4 Argon and GPT-5.5
BenchmarkGemini 4 ArgonGPT-5.5Leader
GPQA DiamondNot measured93.2%Only GPT-5.5 measured
LiveBench reasoning95.1%89.7%Gemini 4 Argon
MysteryMechanism (Vals AI)45.5%Not measuredOnly Gemini 4 Argon measured
MMMU Pro (Vals AI)Not measured88.3%Only GPT-5.5 measured
GPQA Diamond (Artificial Analysis run)Not measured93.5%Only GPT-5.5 measured
Humanity's Last Exam (Artificial Analysis run)57.1%45.8%Gemini 4 Argon
GPQA Diamond (Epoch AI run)96.4%90.7%Gemini 4 Argon
ARC-AGI98.5%95.0%Gemini 4 Argon
ARC-AGI-291.3%85.0%Gemini 4 Argon
SimpleBenchNot measured69.0%Only GPT-5.5 measured
Chess puzzles59.0%63.0%GPT-5.5
Mystery game puzzles64.0%56.0%Gemini 4 Argon
EBR-bench64.8%34.3%Gemini 4 Argon
LMArena Text: hard prompts15461489Gemini 4 Argon
LMArena Text: expert15501507Gemini 4 Argon
LMArena Text: hard prompts in English15481483Gemini 4 Argon
LMArena Vision: diagramsNot measured1325Only GPT-5.5 measured
LMArena Vision: homeworkNot measured1332Only GPT-5.5 measured
Kagi LLM BenchmarkNot measured88.8%Only GPT-5.5 measured
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index60
Math benchmarks for Gemini 4 Argon and GPT-5.5
BenchmarkGemini 4 ArgonGPT-5.5Leader
OTIS Mock AIME100.0%84.4%Gemini 4 Argon
FrontierMath, tiers 1 to 386.0%85.3%Gemini 4 Argon
FrontierMath, tier 478.0%72.5%Gemini 4 Argon
ProofBench99.0%50.0%Gemini 4 Argon
LMArena Text: math15361487Gemini 4 Argon
LMArena Text: mathematical work15571496Gemini 4 Argon
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index70
Knowledge benchmarks for Gemini 4 Argon and GPT-5.5
BenchmarkGemini 4 ArgonGPT-5.5Leader
MMLU ProNot measured88.1%Only GPT-5.5 measured
LegalBench (Vals AI)88.3%86.5%Gemini 4 Argon
CaseLaw (Vals AI)Not measured66.2%Only GPT-5.5 measured
CorpFin (Vals AI)Not measured68.4%Only GPT-5.5 measured
TaxEval (Vals AI)Not measured75.0%Only GPT-5.5 measured
MortgageTax (Vals AI)Not measured68.8%Only GPT-5.5 measured
MedCode (Vals AI)58.8%49.1%Gemini 4 Argon
SimpleQA Verified76.0%63.0%Gemini 4 Argon
LMArena Text: science15481485Gemini 4 Argon
LMArena Text: medicine and healthcare15551465Gemini 4 Argon
LMArena Text: legal and government15481491Gemini 4 Argon
LMArena Text: business and finance15251478Gemini 4 Argon
FACTS Benchmark SuiteNot measured66.7%Only GPT-5.5 measured
Neither model has a result on the other 5 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index70
Web design benchmarks for Gemini 4 Argon and GPT-5.5
BenchmarkGemini 4 ArgonGPT-5.5Leader
Design Arena: websites13151256Gemini 4 Argon
Design Arena: UI components13311260Gemini 4 Argon
Design Arena: game dev13751294Gemini 4 Argon
Design Arena: data viz13361265Gemini 4 Argon
Design Arena: 3D13891198Gemini 4 Argon
Design Arena: all code categories13291260Gemini 4 Argon
Design Arena: SVGNot measured1234Only GPT-5.5 measured
Design Arena: ASCII artNot measured1255Only GPT-5.5 measured
LiveBench design73.7%70.3%Gemini 4 Argon
GeneralLike-for-likePublic boards, shown as published, kept out of the index191
General benchmarks for Gemini 4 Argon and GPT-5.5
BenchmarkGemini 4 ArgonGPT-5.5Leader
Vals Index69.2%Not measuredOnly Gemini 4 Argon measured
LiveBench data analysis85.2%81.6%Gemini 4 Argon
Public Benefits Bench (Vals AI)69.8%60.9%Gemini 4 Argon
SAGE (Vals AI)53.6%51.5%Gemini 4 Argon
MedScribe (Vals AI)87.4%86.9%Gemini 4 Argon
Vals Multimodal IndexNot measured68.1%Only GPT-5.5 measured
IFBenchNot measured75.9%Only GPT-5.5 measured
Long context reasoning (AA-LCR)79.7%84.3%GPT-5.5
DTBench97.6%96.0%Gemini 4 Argon
LMCA63.7%54.3%Gemini 4 Argon
Surface Evolver BenchNot measured88.1%Only GPT-5.5 measured
Furniture assembly72.5%44.2%Gemini 4 Argon
ExploitBenchNot measured47.4%Only GPT-5.5 measured
CL-bench LifeNot measured22.2%Only GPT-5.5 measured
LMArena Text15321471Gemini 4 Argon
LMArena Text: instruction following15341478Gemini 4 Argon
LMArena Text: creative writing15271455Gemini 4 Argon
LMArena VisionNot measured1297Only GPT-5.5 measured
LMArena Text: English15381470Gemini 4 Argon
LMArena Text: non-English15221467Gemini 4 Argon
LMArena Text: Chinese16111534Gemini 4 Argon
LMArena Text: GermanNot measured1480Only GPT-5.5 measured
LMArena Text: JapaneseNot measured1499Only GPT-5.5 measured
LMArena Text: KoreanNot measured1460Only GPT-5.5 measured
LMArena Text: FrenchNot measured1485Only GPT-5.5 measured
LMArena Text: Spanish15031468Gemini 4 Argon
LMArena Text: Russian15341473Gemini 4 Argon
LMArena Text: PolishNot measured1465Only GPT-5.5 measured
LMArena Text: multi-turn15561476Gemini 4 Argon
LMArena Text: longer queries15471484Gemini 4 Argon
LMArena Text: writing and language15291466Gemini 4 Argon
LMArena Text: entertainment and media15271449Gemini 4 Argon
LMArena Vision: EnglishNot measured1292Only GPT-5.5 measured
LMArena Vision: ChineseNot measured1360Only GPT-5.5 measured
LMArena Vision: reading textNot measured1306Only GPT-5.5 measured
LMArena Vision: humorNot measured1293Only GPT-5.5 measured
LMArena Vision: recognizing thingsNot measured1231Only GPT-5.5 measured
LMArena Vision: creative writingNot measured1301Only GPT-5.5 measured
LMArena DocumentNot measured1486Only GPT-5.5 measured
Neither model has a result on the other 7 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Gemini 4 Argon and GPT-5.5
BenchmarkGemini 4 ArgonGPT-5.5Leader
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 Argon$0.0070Fits in one request
GPT-5.5$0.020Fits in one request

Gemini 4 Argon costs less

Repository review

50K input + 3K output tokens

Gemini 4 Argon$0.130Fits in one request
GPT-5.5$0.340Fits in one request

Gemini 4 Argon costs less

Agent loop

200K input + 10K output tokens

Gemini 4 Argon$0.500Fits in one request
GPT-5.5$1.30Fits in one request

Gemini 4 Argon 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 Argon and GPT-5.5
SpecificationGoogle Gemini 4 ArgonOpenAI GPT-5.5
MakerGoogleOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedOctober 13, 2026April 24, 2026
Context window1.05M1.05M
Input $/Mtok$2.00$5.00
Output $/Mtok$10.00$30.00
Coding index81.071.3
Independent measurements behind it55
Cost per solved taskNot computable$1.65
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 4 Argon better than GPT-5.5 for coding?

Pick Gemini 4 Argon for coding: it scores 81.0 on the Vibe Coding Index against 71.3 for GPT-5.5. Pick GPT-5.5 for a larger context window (1.05M against 1.05M tokens) and work measured by Terminal-Bench 2.1 (Vals AI) or Chess puzzles, where it leads.

Which is cheaper, Gemini 4 Argon or GPT-5.5?

Gemini 4 Argon costs $2.00 per million input tokens and $10.00 per million output tokens; GPT-5.5 costs $5.00 and $30.00. Cost per solved task is known for GPT-5.5 only.

Which has the bigger context window, Gemini 4 Argon or GPT-5.5?

GPT-5.5, with 1.05M tokens against 1.05M.

How many benchmarks is the Gemini 4 Argon vs GPT-5.5 comparison based on?

77 benchmarks have a result for both models as of October 21, 2026. Gemini 4 Argon's coding index rests on 5 independent benchmarks and GPT-5.5's on 5. Where only one model has a result, the page says so instead of naming a winner.

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