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Claude Sonnet 5 vs Gemini 4 Argon

Updated October 21, 2026. 78 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Claude Sonnet 5 Replace Gemini 4 Argon
Claude Sonnet 5Anthropic
Coding
63.5
Overall
38.2
Output $/M
$10.00
3
Gemini 4 ArgonGoogle
Coding
80.5
Overall
52.6
Output $/M
$10.00
75
vs boards won of 78 shared

Decision reading

Pick Gemini 4 Argon for coding: it scores 80.5 on the Vibe Coding Index against 63.5 for Claude Sonnet 5.

Pick Claude Sonnet 5 when what matters is Terminal-Bench 2.1 (Vals AI) or LiveBench design, where it leads.

Model AClaude Sonnet 5Anthropic63.5/1002 independent benchmarks$1.87 per solved taskModel BGemini 4 ArgonGoogle80.5/1002 independent benchmarksNo cost per solved task
Shared results
78
Claude Sonnet 5 only
42
Gemini 4 Argon only
14
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.

At a glance

Coding index
Claude Sonnet 5 63.5 from 2 benchmarks, Gemini 4 Argon 80.5 from 2 benchmarks.
Widest category
Agentic work, 22.9 points apart on average over 12 shared benchmarks.
Widest single gap
IOI (Vals AI): Claude Sonnet 5 45.0% against Gemini 4 Argon 100.0%, 55.0 points apart on a 0 to 100 scale.
Output price
Both cost $10.00 per million output tokens.
Context window
Claude Sonnet 5 takes 1M tokens, Gemini 4 Argon 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
CategoryClaude Sonnet 5BarsGemini 4 ArgonTies
Coding116
Intelligence02
Agentic work012
Reasoning08
Math06
Knowledge07
Web design16
General118
All shared boards375
CodingLike-for-likeFour of these boards feed the Vibe Coding Index116
Coding benchmarks for Claude Sonnet 5 and Gemini 4 Argon
BenchmarkClaude Sonnet 5Gemini 4 ArgonLeader
LiveBench coding74.7%89.7%Gemini 4 Argon
LMArena WebDev15401678Gemini 4 Argon
AA Coding Index71.5Not measuredOnly Claude Sonnet 5 measured
LiveCodeBench (Vals AI)82.4%Not measuredOnly Claude Sonnet 5 measured
SWE-bench Verified (Vals AI)79.6%Not measuredOnly Claude Sonnet 5 measured
Terminal-Bench 4 (Vals AI)10.6%57.6%Gemini 4 Argon
Vibe Code Bench (Vals AI)81.3%91.9%Gemini 4 Argon
Code migration (Vals AI)44.4%68.2%Gemini 4 Argon
ProgramBench (Vals AI)0.0%2.5%Gemini 4 Argon
IOI (Vals AI)45.0%100.0%Gemini 4 Argon
Terminal-Bench 2.1 (Vals AI)74.5%57.7%Claude Sonnet 5
SWE-bench Multimodal (Vals AI)Not measured56.0%Only Gemini 4 Argon measured
Vibe Code Bench 1-100 (Vals AI)13.8%21.2%Gemini 4 Argon
SkillsBench (Vals AI)46.5%Not measuredOnly Claude Sonnet 5 measured
CyberBench (Vals AI)70.3%77.9%Gemini 4 Argon
SciCode54.3%61.8%Gemini 4 Argon
FrontierCode42.7%47.5%Gemini 4 Argon
FrontierSWENot measured55.0%Only Gemini 4 Argon measured
GSO-Bench37.3%Not measuredOnly Claude Sonnet 5 measured
WeirdML68.8%Not measuredOnly Claude Sonnet 5 measured
ALE-Bench1463.12100.1Gemini 4 Argon
LMArena Text: coding14831546Gemini 4 Argon
LMArena Text: software and IT14741556Gemini 4 Argon
LMArena WebDev: React15411692Gemini 4 Argon
LMArena WebDev: HTML15271643Gemini 4 Argon
LMArena WebDev: from an image1540Not measuredOnly Claude Sonnet 5 measured
Neither model has a result on the other 12 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Claude Sonnet 5 and Gemini 4 Argon
BenchmarkClaude Sonnet 5Gemini 4 ArgonLeader
AA Intelligence Index38.252.6Gemini 4 Argon
Epoch Capabilities Index156.9166.4Gemini 4 Argon
Agentic workLike-for-likePublic boards, shown as published, kept out of the index012
Agentic work benchmarks for Claude Sonnet 5 and Gemini 4 Argon
BenchmarkClaude Sonnet 5Gemini 4 ArgonLeader
AA Agentic Index43.6Not measuredOnly Claude Sonnet 5 measured
Design Arena: agents building web apps1245Not measuredOnly Claude Sonnet 5 measured
Design Arena: agents building full-stack apps1249Not measuredOnly Claude Sonnet 5 measured
Design Arena: agents building mobile apps1215Not measuredOnly Claude Sonnet 5 measured
Design Arena: agents building Android apps1231Not measuredOnly Claude Sonnet 5 measured
Design Arena: agents building Godot games1225Not measuredOnly Claude Sonnet 5 measured
Design Arena: agents building games1227Not measuredOnly Claude Sonnet 5 measured
Design Arena: HTML slides1218Not measuredOnly Claude Sonnet 5 measured
Design Arena: PowerPoint slides1216Not measuredOnly Claude Sonnet 5 measured
Design Arena: spreadsheets10041151Gemini 4 Argon
LiveBench research82.8%83.1%Gemini 4 Argon
LiveBench browser72.0%92.0%Gemini 4 Argon
LiveBench long agentic39.0%69.9%Gemini 4 Argon
SREBench (Vals AI)0.4%44.3%Gemini 4 Argon
Finance Agent (Vals AI)53.9%65.4%Gemini 4 Argon
Tax Agent Bench (Vals AI)29.4%44.6%Gemini 4 Argon
Legal Research Bench (Vals AI)41.8%54.8%Gemini 4 Argon
Harvey's Legal Agent Benchmark (Vals AI)Not measured27.1%Only Gemini 4 Argon measured
Excel Modeling Benchmark (Vals AI)66.3%75.2%Gemini 4 Argon
BioMysteryBench (Vals AI)Not measured76.3%Only Gemini 4 Argon measured
Terminal-Bench-Science (Vals AI)5.7%44.3%Gemini 4 Argon
Vals Science IndexNot measured55.4%Only Gemini 4 Argon measured
Time Horizon Index (Vals AI)Not measured52.5%Only Gemini 4 Argon measured
CUA-bench (Vals AI)Not measured4.8%Only Gemini 4 Argon measured
Robo-bench (Vals AI)Not measured0.8%Only Gemini 4 Argon measured
APEX-Agents54.5%82.4%Gemini 4 Argon
Vending-Bench 2$6,378$13,718Gemini 4 Argon
Neither model has a result on the other 12 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index08
Reasoning benchmarks for Claude Sonnet 5 and Gemini 4 Argon
BenchmarkClaude Sonnet 5Gemini 4 ArgonLeader
GPQA Diamond88.9%Not measuredOnly Claude Sonnet 5 measured
LiveBench reasoning88.7%95.1%Gemini 4 Argon
MysteryMechanism (Vals AI)Not measured45.5%Only Gemini 4 Argon measured
MMMU Pro (Vals AI)83.0%Not measuredOnly Claude Sonnet 5 measured
GPQA Diamond (Artificial Analysis run)91.1%Not measuredOnly Claude Sonnet 5 measured
Humanity's Last Exam (Artificial Analysis run)41.3%57.1%Gemini 4 Argon
GPQA Diamond (Epoch AI run)90.5%96.4%Gemini 4 Argon
ARC-AGINot measured98.5%Only Gemini 4 Argon measured
ARC-AGI-2Not measured91.3%Only Gemini 4 Argon measured
SimpleBench60.6%Not measuredOnly Claude Sonnet 5 measured
Chess puzzles45.0%59.0%Gemini 4 Argon
Mystery game puzzles35.0%64.0%Gemini 4 Argon
EBR-benchNot measured64.8%Only Gemini 4 Argon measured
LMArena Text: hard prompts14611546Gemini 4 Argon
LMArena Text: expert14891550Gemini 4 Argon
LMArena Text: hard prompts in English14641548Gemini 4 Argon
LMArena Vision: diagrams1293Not measuredOnly Claude Sonnet 5 measured
LMArena Vision: homework1311Not measuredOnly Claude Sonnet 5 measured
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index06
Math benchmarks for Claude Sonnet 5 and Gemini 4 Argon
BenchmarkClaude Sonnet 5Gemini 4 ArgonLeader
OTIS Mock AIME94.7%100.0%Gemini 4 Argon
FrontierMath, tiers 1 to 365.6%86.0%Gemini 4 Argon
FrontierMath, tier 429.3%78.0%Gemini 4 Argon
ProofBench77.0%99.0%Gemini 4 Argon
LMArena Text: math14671536Gemini 4 Argon
LMArena Text: mathematical work14811557Gemini 4 Argon
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index07
Knowledge benchmarks for Claude Sonnet 5 and Gemini 4 Argon
BenchmarkClaude Sonnet 5Gemini 4 ArgonLeader
MMLU Pro87.5%Not measuredOnly Claude Sonnet 5 measured
LegalBench (Vals AI)83.9%88.3%Gemini 4 Argon
CorpFin (Vals AI)67.0%Not measuredOnly Claude Sonnet 5 measured
TaxEval (Vals AI)75.6%Not measuredOnly Claude Sonnet 5 measured
MortgageTax (Vals AI)70.0%Not measuredOnly Claude Sonnet 5 measured
MedCode (Vals AI)47.5%58.8%Gemini 4 Argon
SimpleQA Verified33.7%76.0%Gemini 4 Argon
LMArena Text: science14601548Gemini 4 Argon
LMArena Text: medicine and healthcare14421555Gemini 4 Argon
LMArena Text: legal and government14541548Gemini 4 Argon
LMArena Text: business and finance14361525Gemini 4 Argon
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index16
Web design benchmarks for Claude Sonnet 5 and Gemini 4 Argon
BenchmarkClaude Sonnet 5Gemini 4 ArgonLeader
Design Arena: websites12741315Gemini 4 Argon
Design Arena: UI components12791333Gemini 4 Argon
Design Arena: game dev12781377Gemini 4 Argon
Design Arena: data viz12511334Gemini 4 Argon
Design Arena: 3D12611389Gemini 4 Argon
Design Arena: all code categories12761328Gemini 4 Argon
Design Arena: SVG1193Not measuredOnly Claude Sonnet 5 measured
Design Arena: ASCII art1207Not measuredOnly Claude Sonnet 5 measured
LiveBench design82.0%73.7%Claude Sonnet 5
GeneralLike-for-likePublic boards, shown as published, kept out of the index118
General benchmarks for Claude Sonnet 5 and Gemini 4 Argon
BenchmarkClaude Sonnet 5Gemini 4 ArgonLeader
Vals IndexNot measured69.2%Only Gemini 4 Argon measured
LiveBench data analysis71.7%85.2%Gemini 4 Argon
Public Benefits Bench (Vals AI)66.0%69.8%Gemini 4 Argon
SAGE (Vals AI)48.9%53.6%Gemini 4 Argon
MedScribe (Vals AI)76.0%87.4%Gemini 4 Argon
Vals Multimodal Index68.8%Not measuredOnly Claude Sonnet 5 measured
Long context reasoning (AA-LCR)82.0%79.7%Claude Sonnet 5
DTBench92.5%97.6%Gemini 4 Argon
LMCA50.0%63.7%Gemini 4 Argon
Surface Evolver Bench60.0%Not measuredOnly Claude Sonnet 5 measured
Furniture assemblyNot measured72.5%Only Gemini 4 Argon measured
LMArena Text14421532Gemini 4 Argon
LMArena Text: instruction following14521534Gemini 4 Argon
LMArena Text: creative writing14161527Gemini 4 Argon
LMArena Vision1273Not measuredOnly Claude Sonnet 5 measured
LMArena Text: English14501538Gemini 4 Argon
LMArena Text: non-English14311522Gemini 4 Argon
LMArena Text: Chinese14781611Gemini 4 Argon
LMArena Text: German1442Not measuredOnly Claude Sonnet 5 measured
LMArena Text: Japanese1422Not measuredOnly Claude Sonnet 5 measured
LMArena Text: Korean1412Not measuredOnly Claude Sonnet 5 measured
LMArena Text: French1463Not measuredOnly Claude Sonnet 5 measured
LMArena Text: Spanish14381503Gemini 4 Argon
LMArena Text: Russian14501534Gemini 4 Argon
LMArena Text: Polish1425Not measuredOnly Claude Sonnet 5 measured
LMArena Text: multi-turn14531556Gemini 4 Argon
LMArena Text: longer queries14621547Gemini 4 Argon
LMArena Text: writing and language14361529Gemini 4 Argon
LMArena Text: entertainment and media14111527Gemini 4 Argon
LMArena Vision: English1275Not measuredOnly Claude Sonnet 5 measured
LMArena Vision: Chinese1331Not measuredOnly Claude Sonnet 5 measured
LMArena Vision: reading text1288Not measuredOnly Claude Sonnet 5 measured
LMArena Vision: humor1261Not measuredOnly Claude Sonnet 5 measured
LMArena Vision: creative writing1246Not measuredOnly Claude Sonnet 5 measured
LMArena Document1466Not measuredOnly Claude Sonnet 5 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 Claude Sonnet 5 and Gemini 4 Argon
BenchmarkClaude Sonnet 5Gemini 4 ArgonLeader
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

Claude Sonnet 5$0.0070Fits in one request
Gemini 4 Argon$0.0070Fits in one request

Same cost

Repository review

50K input + 3K output tokens

Claude Sonnet 5$0.130Fits in one request
Gemini 4 Argon$0.130Fits in one request

Same cost

Agent loop

200K input + 10K output tokens

Claude Sonnet 5$0.500Fits in one request
Gemini 4 Argon$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 Claude Sonnet 5 and Gemini 4 Argon
SpecificationAnthropic Claude Sonnet 5Google Gemini 4 Argon
MakerAnthropicGoogle
WeightsNo public weights listedNo public weights listed
ReleasedJune 30, 2026October 13, 2026
Context window1M1.05M
Input $/Mtok$2.00$2.00
Output $/Mtok$10.00$10.00
Coding index63.580.5
Independent measurements behind it22
Cost per solved task$1.87Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Sonnet 5 better than Gemini 4 Argon for coding?

Pick Gemini 4 Argon for coding: it scores 80.5 on the Vibe Coding Index against 63.5 for Claude Sonnet 5. Pick Claude Sonnet 5 when what matters is Terminal-Bench 2.1 (Vals AI) or LiveBench design, where it leads.

Which is cheaper, Claude Sonnet 5 or Gemini 4 Argon?

Claude Sonnet 5 costs $2.00 per million input tokens and $10.00 per million output tokens; Gemini 4 Argon costs $2.00 and $10.00. Cost per solved task is known for Claude Sonnet 5 only.

Which has the bigger context window, Claude Sonnet 5 or Gemini 4 Argon?

Gemini 4 Argon, with 1.05M tokens against 1M.

How many benchmarks is the Claude Sonnet 5 vs Gemini 4 Argon comparison based on?

78 benchmarks have a result for both models as of October 21, 2026. Claude Sonnet 5's coding index rests on 2 independent benchmarks and Gemini 4 Argon's on 2. 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/claude-sonnet-5-vs-gemini-4-argon">LLMBenchmark.ai, Claude Sonnet 5 vs Gemini 4 Argon</a></p>