Noometry

Model comparison

Claude Opus 4.5 vs Gemini 3.6 Flash

Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 50.5 on the Noometry Index.

Last verified . 37 shared benchmarks.

Claude Opus 4.5 Anthropic

50.5

Rank #39 Confirmed

Gemini 3.6 Flash Google

54.1

Rank #30 Confirmed

Summary

  • They share 37 benchmarks with published results for both. Claude Opus 4.5 scores higher in 4 categories and Gemini 3.6 Flash in 6 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where Gemini 3.6 Flash leads 57.0 to 38.5.
  • The biggest single-benchmark swing is NYT Connections (extended): 52.5% for Claude Opus 4.5 and 89% for Gemini 3.6 Flash.
  • Gemini 3.6 Flash is cheaper at $0.75 / $3.75 per million input/output tokens, against $5 / $25 for Claude Opus 4.5.
  • Gemini 3.6 Flash accepts more context: 1.05M tokens versus 200K.

Side by side

Claude Opus 4.5Gemini 3.6 Flash
ProviderAnthropicGoogle
Noometry Index50.554.1
Released2025-11-012026-07-21
WeightsProprietaryProprietary
Context window200K1.05M
Max output64K66K
Input $ / M tokens$5$0.75
Output $ / M tokens$25$3.75
Results tracked6946

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Category by category

Coding Claude Opus 4.5 leads

Claude Opus 4.5: 55.4 (#21), Gemini 3.6 Flash: 49.6 (#45)

BenchmarkClaude Opus 4.5Gemini 3.6 Flash
LMArena WebDev14931536
WeirdML63.7%56.1%
LMArena Coding15041492
ALE-Bench1,025715.52
SWE-bench Verified76.7%—
DeepSWE—46.7%
FrontierCode—34.4%
SWE-bench Verified (bash only)76.8%—
SWE-bench Multilingual70.7%—
SciCode—52.7%
GSO26.5%—
AlgoTune1.77—

Agentic & Tool Use Claude Opus 4.5 leads

Claude Opus 4.5: 47.2 (#11), Gemini 3.6 Flash: 32.4 (#56)

BenchmarkClaude Opus 4.5Gemini 3.6 Flash
Terminal-Bench63.1%—
APEX-Agents—46.9%
Berkeley Function Calling Leaderboard77.5%—
GDPval45.5%—
Remote Labor Index3.8%—
τ²-bench Airline84%—
τ²-bench Banking24.7%—
τ²-bench Retail79.6%—
τ²-bench Telecom92.3%—
Cybench82%—
DeepResearch Bench54.8%—
OSWorld66.3%—
BALROG43.5%—
GDP.pdf—14%
LMArena Search1180—
METR Time Horizons75%—
Vending-Bench 24,967—

Reasoning Gemini 3.6 Flash leads

Claude Opus 4.5: 42.5 (#43), Gemini 3.6 Flash: 58.9 (#20)

BenchmarkClaude Opus 4.5Gemini 3.6 Flash
ARC-AGI-237.6%60.4%
NYT Connections (extended)52.5%89%
ARC-AGI-180%91.2%
Chess Puzzles12%43%
LMArena Hard Prompts14761486
Mystery Game Puzzles22%30%
DTBench89.9%95.5%
LMCA44.5%44.9%
Epoch Capabilities Index150.1154.36
SimpleBench62%—
Kagi LLM Benchmark80.2%—
CritPt—10.6%
EnigmaEval11.9%—
EBR-Bench14.3%—
ForecastBench60.7—

Math Gemini 3.6 Flash leads

Claude Opus 4.5: 38.5 (#85), Gemini 3.6 Flash: 57.0 (#33)

BenchmarkClaude Opus 4.5Gemini 3.6 Flash
FrontierMath (Tiers 1-3)34.4%58.9%
FrontierMath Tier 44.9%22%
OTIS Mock AIME 2024-202586.1%94.2%
ProofBench36%36%
LMArena Math14631504
MathArena Final-Answer Competitions—70.8%
FrontierMath (Feb 2025 set)20.7%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Gemini 3.6 Flash leads

Claude Opus 4.5: 56.4 (#38), Gemini 3.6 Flash: 67.8 (#7)

BenchmarkClaude Opus 4.5Gemini 3.6 Flash
GPQA Diamond86%94.1%
SimpleQA Verified45.7%66.2%
LMArena Expert14881489
Humanity's Last Exam25.2%—
Vectara Hallucination Rate10.9%—

Multimodal Gemini 3.6 Flash leads

Claude Opus 4.5: 31.1 (#99), Gemini 3.6 Flash: 38.7 (#55)

BenchmarkClaude Opus 4.5Gemini 3.6 Flash
Furniture Assembly28.3%23.3%
LMArena Document14621456
LMArena Vision—1297
GeoBench75%—
VPCT40%—
Blueprint-Bench 2—31.2%

Multilingual Gemini 3.6 Flash leads

Claude Opus 4.5: 54.5 (#45), Gemini 3.6 Flash: 56.8 (#17)

BenchmarkClaude Opus 4.5Gemini 3.6 Flash
LMArena Non-English14381470
LMArena Chinese14701530
LMArena French14711501
LMArena German14491478
LMArena Japanese14151477
LMArena Korean14241435
LMArena Russian14481490
LMArena Spanish14551477

Instruction Following Too close to call

Claude Opus 4.5: 77.7 (#20), Gemini 3.6 Flash: 77.2 (#27)

BenchmarkClaude Opus 4.5Gemini 3.6 Flash
LMArena Instruction Following14781467

Long Context Claude Opus 4.5 leads

Claude Opus 4.5: 46.4 (#21), Gemini 3.6 Flash: 45.1 (#47)

BenchmarkClaude Opus 4.5Gemini 3.6 Flash
LMArena Longer Query14801475
CL-bench21.1%—

Writing & Preference Too close to call

Claude Opus 4.5: 68.2 (#28), Gemini 3.6 Flash: 68.3 (#26)

BenchmarkClaude Opus 4.5Gemini 3.6 Flash
LMArena Text14511478
LMArena Creative Writing14451464
EQ-Bench Creative Writing16871604
LMArena Multi-Turn14661481

Frequently asked questions

Is Claude Opus 4.5 better than Gemini 3.6 Flash?

Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 50.5 on the Noometry Index.

Which is cheaper, Claude Opus 4.5 or Gemini 3.6 Flash?

Gemini 3.6 Flash is cheaper. It lists at $0.75 per million input tokens and $3.75 per million output tokens; Claude Opus 4.5 lists at $5 and $25.

Is Claude Opus 4.5 or Gemini 3.6 Flash better for coding?

Claude Opus 4.5 scores higher on coding benchmarks: 55.4 versus 49.6 in the Noometry coding category.

Which has the bigger context window?

Gemini 3.6 Flash does, with 1.05M tokens against 200K.

How many benchmarks do Claude Opus 4.5 and Gemini 3.6 Flash share?

37 benchmarks have published results for both models. Claude Opus 4.5 has 69 scored results on Noometry and Gemini 3.6 Flash has 46.

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