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Model comparison

Claude Sonnet 5 vs Gemini 3 Flash

Data verified

Head-to-head evidence from 11 shared benchmark results across 4 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

65.32/100
Margin
4.8pts
← winning
60.49/100
0 category wins0 category wins

Public leaderboard positions: Claude Sonnet 5 #29 (Estimated); Gemini 3 Flash #49 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude Sonnet 5 and Gemini 3 Flash share 11 comparable benchmark results. 0 of 8 categories are comparable. 25 results are unique to Claude Sonnet 5; 8 to Gemini 3 Flash.

Updated July 23, 2026
Shared results
11
Claude Sonnet 5 only
25
Gemini 3 Flash only
8
Comparable categories
0 / 8

Benchmark data for Claude Sonnet 5 and Gemini 3 Flash is coming soon on BenchLM.

Confidence note. This is a partial-evidence comparison with 11 shared benchmark results across 4 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.

Claude Sonnet 5 is priced at $2.00 input / $10.00 output per 1M tokens, versus $0.50 input / $3.00 output per 1M tokens for Gemini 3 Flash.

Category breakdown

Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.

Category scores and score margins for Claude Sonnet 5 and Gemini 3 Flash
CategoryClaude Sonnet 5ΔGemini 3 Flash
AgenticClaude Sonnet 581.9MarginNo overlapGemini 3 FlashNot measured
CodingClaude Sonnet 576.7MarginNo overlapGemini 3 FlashNot measured
KnowledgeClaude Sonnet 557.4MarginNo overlapGemini 3 FlashNot measured
MathClaude Sonnet 5Not measuredMarginNo overlapGemini 3 Flash27.8
MultimodalClaude Sonnet 588.3MarginNo overlapGemini 3 FlashNot measured

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

MetricClaude Sonnet 5Gemini 3 FlashComparison
Input / output priceUSD per 1M tokensClaude Sonnet 5$2 input / $10 outputGemini 3 Flash$0.5 input / $3 outputGemini 3 Flash has the lower combined listed price.
Generation speedtokens per secondClaude Sonnet 5Not availableGemini 3 Flash159 tok/sA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Sonnet 5Not availableGemini 3 Flash1.19 sA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Sonnet 51MGemini 3 Flash1MListed context windows are equal.

Benchmark Deep Dive

Agentic
BenchmarkClaude Sonnet 5Gemini 3 FlashResult
Terminal-Bench 2.0Source 80.4%—Not comparable
BrowseCompSource 84.7%—Not comparable
HLE w/ toolsSource 57.4%—Not comparable
OSWorld-VerifiedSource 81.2%—Not comparable
GDPval-AASource 1607—Not comparable
AA Agentic IndexSource 46.7%—Not comparable
GDPval-AASource 55.4%—Not comparable
AA BriefcaseSource 1388—Not comparable
AA AutomationBenchSource 39.2%—Not comparable
AA EnterpriseOps-GymSource 44.7%—Not comparable
AA Harvey LABSource 90.1%—Not comparable
AA Tau3 BankingSource 28.2%—Not comparable
aaTerminalBench21Source 80.5%—Not comparable
Claw-EvalSource —49.2%Not comparable
τ²-bench resultsSource —43.3%Not comparable
Gert LabsSource —56.63%Not comparable
JobBenchSource —11.4%Not comparable
Coding
BenchmarkClaude Sonnet 5Gemini 3 FlashResult
SWE-bench VerifiedSource 85.2%—Not comparable
SWE-bench ProSource 63.2%—Not comparable
SWE MultilingualSource 78.3%—Not comparable
SWE MultimodalSource 28.1%—Not comparable
Terminal-Bench 2.0Source 80.4%—Not comparable
FrontierCode 1.1 MainSource 42.7%—Not comparable
cursorBench32Source 61.5%—Not comparable
AA Coding IndexSource 71.5%—Not comparable
AA-SciCodeSource 53.6%49.9%Claude Sonnet 5 leads
Vibe Code BenchSource —20.20%Not comparable
Reasoning
BenchmarkClaude Sonnet 5Gemini 3 FlashResult
AA-LCRSource 70.7%48.0%Claude Sonnet 5 leads
CritPtSource 16.9%1.4%Claude Sonnet 5 leads
Knowledge
BenchmarkClaude Sonnet 5Gemini 3 FlashResult
HLESource 57.4%—Not comparable
HLE w/o toolsSource 43.2%—Not comparable
Artificial Analysis Intelligence IndexSource 53.4%27.4%Claude Sonnet 5 leads
AA-GPQA DiamondSource 91.1%81.2%Claude Sonnet 5 leads
AA-HLESource 39.6%14.1%Claude Sonnet 5 leads
AA-Omniscience IndexSource 15.3%-3.6%Claude Sonnet 5 leads
AA-Omniscience AccuracySource 38.3%45.5%Gemini 3 Flash leads
AA-Omniscience Hallucination RateSource 37.3%90.2%Claude Sonnet 5 leads
Math
BenchmarkClaude Sonnet 5Gemini 3 FlashResult
FrontierMath v2 (Tiers 1-3)Source —35.640%Not comparable
FrontierMath v2 (Tier 4)Source —4.167%Not comparable
Multimodal
BenchmarkClaude Sonnet 5Gemini 3 FlashResult
CharXivSource 88.3%—Not comparable
CharXiv w/o toolsSource 77%—Not comparable
AA-MMMU-ProSource 77.3%78.6%Gemini 3 Flash leads
Design Arena WebsiteSource 13141226Claude Sonnet 5 leads
Inst. Following
BenchmarkClaude Sonnet 5Gemini 3 FlashResult
AA-IFBenchSource —55.1%Not comparable
Frequently Asked Questions (3)

Can I compare Claude Sonnet 5 and Gemini 3 Flash on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.

Why does this comparison show “coming soon”?

BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.

What data is available for Claude Sonnet 5 and Gemini 3 Flash today?

Claude Sonnet 5: $2.00 input / $10.00 output per 1M tokens Gemini 3 Flash: $0.50 input / $3.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.

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