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Model comparison

Claude Opus 4.5 vs Gemini 3 Pro Deep Think

Data verified

Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.

64.22/100
Margin
2.9pts
← winning
61.31/100
1 category wins0 category wins

Public leaderboard positions: Claude Opus 4.5 #34 (Supported); Gemini 3 Pro Deep Think #41 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude Opus 4.5 and Gemini 3 Pro Deep Think share 1 comparable benchmark result. 1 of 8 categories are comparable. 58 results are unique to Claude Opus 4.5; 1 to Gemini 3 Pro Deep Think.

Updated July 20, 2026
Shared results
1
Claude Opus 4.5 only
58
Gemini 3 Pro Deep Think only
1
Comparable categories
1 / 8

Pick Claude Opus 4.5 if you want the stronger benchmark profile. Gemini 3 Pro Deep Think only becomes the better choice if you need the larger 2M context window or you want the stronger reasoning-first profile.

Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

Claude Opus 4.5 has the cleaner BenchAlign overall profile here, landing at 64.22 versus 61.31. It is a real lead, but still close enough that category-level strengths matter more than the headline number.

Claude Opus 4.5's sharpest advantage is in reasoning, where it averages 64.4 against 45.1.

Gemini 3 Pro Deep Think is the reasoning model in the pair, while Claude Opus 4.5 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Gemini 3 Pro Deep Think gives you the larger context window at 2M, compared with 200K for Claude Opus 4.5.

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 Opus 4.5 and Gemini 3 Pro Deep Think
CategoryClaude Opus 4.5ΔGemini 3 Pro Deep Think
ReasoningClaude Opus 4.564.4Margin← 19.3Gemini 3 Pro Deep Think45.1
AgenticClaude Opus 4.562.6MarginNo overlapGemini 3 Pro Deep ThinkNot measured
CodingClaude Opus 4.571.7MarginNo overlapGemini 3 Pro Deep ThinkNot measured
KnowledgeClaude Opus 4.558.1MarginNo overlapGemini 3 Pro Deep ThinkNot measured
MathClaude Opus 4.557.5MarginNo overlapGemini 3 Pro Deep ThinkNot measured
MultilingualClaude Opus 4.585.7MarginNo overlapGemini 3 Pro Deep ThinkNot measured
MultimodalClaude Opus 4.569.9MarginNo overlapGemini 3 Pro Deep ThinkNot measured
Inst. FollowingClaude Opus 4.569.5MarginNo overlapGemini 3 Pro Deep ThinkNot measured

Operational comparison

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

MetricClaude Opus 4.5Gemini 3 Pro Deep ThinkComparison
Input / output priceUSD per 1M tokensClaude Opus 4.5$5 input / $25 outputGemini 3 Pro Deep ThinkNot availableA complete price comparison is not available.
Generation speedtokens per secondClaude Opus 4.546 tok/sGemini 3 Pro Deep ThinkNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Opus 4.51.01 sGemini 3 Pro Deep ThinkNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Opus 4.5200KGemini 3 Pro Deep Think2MGemini 3 Pro Deep Think lists the larger context window.

Benchmark Deep Dive

Agentic
BenchmarkClaude Opus 4.5Gemini 3 Pro Deep ThinkResult
Terminal-Bench 2.0Source 59.3%—Not comparable
OSWorld-VerifiedSource 66.3%—Not comparable
OSWorldSource 66.3%—Not comparable
Claw-EvalSource 59.6%—Not comparable
QwenClawBenchSource 52.3%—Not comparable
τ³-bench resultsSource 70.2%—Not comparable
VITA-BenchSource 23.3%—Not comparable
DeepPlanningSource 26.4%—Not comparable
ToolathlonSource 43.5%—Not comparable
MCP AtlasSource 42.3%—Not comparable
MCP-TasksSource 71.8%—Not comparable
WideResearchSource 76.4%—Not comparable
CyberGymSource 50.6%—Not comparable
τ²-bench resultsSource 86.3%—Not comparable
Gert LabsSource 64.23%—Not comparable
JobBenchSource 32.3%—Not comparable
Coding
BenchmarkClaude Opus 4.5Gemini 3 Pro Deep ThinkResult
SWE-bench VerifiedSource 80.9%—Not comparable
LiveCodeBench v6Source 84.8%—Not comparable
SWE-bench ProSource 57.1%—Not comparable
SWE MultilingualSource 77.5%—Not comparable
NL2RepoSource 43.2%—Not comparable
AA-SciCodeSource 47.0%—Not comparable
ReasoningClaude Opus 4.5 wins
BenchmarkClaude Opus 4.5Gemini 3 Pro Deep ThinkResult
LongBench v2Source 64.4%—Not comparable
AI-NeedleSource 74%—Not comparable
AA-LCRSource 65.3%—Not comparable
CritPtSource 0.3%25.7%Gemini 3 Pro Deep Think leads
ARC-AGI-2Source —45.1%Not comparable
Knowledge
BenchmarkClaude Opus 4.5Gemini 3 Pro Deep ThinkResult
GPQASource 87%—Not comparable
SuperGPQASource 70.6%—Not comparable
MMLU-ProSource 89.5%—Not comparable
MMLU-ReduxSource 96.6%—Not comparable
C-EvalSource 92.2%—Not comparable
HLESource 30.8%—Not comparable
Artificial Analysis Intelligence IndexSource 34.7%—Not comparable
AA-GPQA DiamondSource 81.0%—Not comparable
AA-HLESource 12.9%—Not comparable
AA-Omniscience IndexSource -3.9%—Not comparable
AA-Omniscience AccuracySource 40.7%—Not comparable
AA-Omniscience Hallucination RateSource 75.4%—Not comparable
AA MMLU-ProSource 88.9%—Not comparable
Math
BenchmarkClaude Opus 4.5Gemini 3 Pro Deep ThinkResult
AIME26Source 95.1%—Not comparable
HMMT Feb 2025Source 92.9%—Not comparable
HMMT Nov 2025Source 93.3%—Not comparable
HMMT Feb 2026Source 85.3%—Not comparable
MMAnswerBenchSource 84.0%—Not comparable
FrontierMath v2 (Tiers 1-3)Source 20.690%—Not comparable
FrontierMath v2 (Tier 4)Source 4.167%—Not comparable
Multilingual
BenchmarkClaude Opus 4.5Gemini 3 Pro Deep ThinkResult
MMLU-ProXSource 85.7%—Not comparable
NOVA-63Source 56.7%—Not comparable
Multimodal
BenchmarkClaude Opus 4.5Gemini 3 Pro Deep ThinkResult
MMMU-ProSource 70.6%—Not comparable
MathVisionSource 74.3%—Not comparable
CharXivSource 68.5%—Not comparable
VideoMMMUSource 84.4%—Not comparable
ScreenSpot ProSource 45.7%—Not comparable
V*Source 67.0%—Not comparable
AA-MMMU-ProSource 71.2%—Not comparable
Design Arena WebsiteSource 1279—Not comparable
Inst. Following
BenchmarkClaude Opus 4.5Gemini 3 Pro Deep ThinkResult
IFEvalSource 90.9%—Not comparable
IFBenchSource 58%—Not comparable
AA-IFBenchSource 43.0%—Not comparable
Frequently Asked Questions (2)

Which is better, Claude Opus 4.5 or Gemini 3 Pro Deep Think?

Claude Opus 4.5 is ahead on BenchLM's BenchAlign leaderboard, 64.22 to 61.31.

Which is better for reasoning, Claude Opus 4.5 or Gemini 3 Pro Deep Think?

Claude Opus 4.5 has the edge for reasoning in this comparison, averaging 64.4 versus 45.1. Inside this category, CritPt is the benchmark that creates the most daylight between them.

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Last updated: July 20, 2026

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