Noometry

Model comparison

Claude Opus 4.6 vs Gemini 3 Flash Preview

Claude Opus 4.6 is the stronger model overall, scoring 58.2 to 52.3 on the Noometry Index. Gemini 3 Flash Preview costs 8.9× less per token, which makes it the better buy when Claude Opus 4.6's lead doesn't matter for your workload.

Last verified . 51 shared benchmarks.

Claude Opus 4.6 Anthropic

58.2

Rank #20 Confirmed

Gemini 3 Flash Preview Google

52.3

Rank #40 Confirmed

Summary

  • They share 51 benchmarks with published results for both. Claude Opus 4.6 scores higher in 9 categories and Gemini 3 Flash Preview in 1 category; 10 gaps are clear of the uncertainty.
  • The widest gap is in agentic & tool use, where Claude Opus 4.6 leads 51.1 to 38.7.
  • The biggest single-benchmark swing is ARC-AGI-2: 69.2% for Claude Opus 4.6 and 33.6% for Gemini 3 Flash Preview.
  • Gemini 3 Flash Preview is cheaper at $0.50 / $3 per million input/output tokens, against $5 / $25 for Claude Opus 4.6.
  • Gemini 3 Flash Preview accepts more context: 1.05M tokens versus 1M.

Side by side

Claude Opus 4.6Gemini 3 Flash Preview
ProviderAnthropicGoogle
Noometry Index58.252.3
Released2026-02-042025-12-17
WeightsProprietaryProprietary
Context window1M1.05M
Max output128K66K
Input $ / M tokens$5$0.50
Output $ / M tokens$25$3
Results tracked6859

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Category by category

Coding Claude Opus 4.6 leads

Claude Opus 4.6: 57.2 (#20), Gemini 3 Flash Preview: 50.9 (#42)

BenchmarkClaude Opus 4.6Gemini 3 Flash Preview
SWE-bench Verified78.7%75.4%
SWE-bench Verified (bash only)75.6%75.8%
LMArena WebDev15471439
SWE-bench Multilingual72%72.7%
GSO41.2%9.8%
WeirdML78%61.6%
LMArena Coding15361460
ALE-Bench996.51,367
FrontierCode26.6%—
AlgoTune1.47—

Agentic & Tool Use Claude Opus 4.6 leads

Claude Opus 4.6: 51.1 (#4), Gemini 3 Flash Preview: 38.7 (#29)

BenchmarkClaude Opus 4.6Gemini 3 Flash Preview
Terminal-Bench79.8%64.3%
τ²-bench Banking27.3%27.3%
DeepResearch Bench55.3%49.8%
LMArena Search12531198
Vending-Bench 28,0183,635
APEX-Agents46.3%—
Remote Labor Index4.2%—
τ²-bench Airline—82.5%
τ²-bench Retail—76.8%
τ²-bench Telecom—91.2%
Cybench93%—
BALROG—48.1%
GBAEval44.1%—
GDP.pdf—10%
METR Time Horizons78.9%—

Reasoning Claude Opus 4.6 leads

Claude Opus 4.6: 57.8 (#23), Gemini 3 Flash Preview: 49.2 (#37)

BenchmarkClaude Opus 4.6Gemini 3 Flash Preview
ARC-AGI-269.2%33.6%
SimpleBench67.6%61.1%
NYT Connections (extended)92.1%83.1%
ARC-AGI-194%84.7%
Chess Puzzles17%40%
LMArena Hard Prompts15271465
Mystery Game Puzzles25%26%
DTBench91.2%89.1%
LMCA55.8%43.1%
Epoch Capabilities Index155.24151.8
ForecastBench6058.5
Kagi LLM Benchmark83.6%—
EnigmaEval7.6%—
Thematic Generalization80.6%—
EBR-Bench12.7%—

Math Claude Opus 4.6 leads

Claude Opus 4.6: 63.0 (#31), Gemini 3 Flash Preview: 51.7 (#55)

BenchmarkClaude Opus 4.6Gemini 3 Flash Preview
FrontierMath (Tiers 1-3)66%51.2%
FrontierMath Tier 426.8%17.1%
MathArena Final-Answer Competitions78.5%67.6%
OTIS Mock AIME 2024-202594.4%95.6%
ProofBench50%15%
LMArena Math15191473
FrontierMath (Feb 2025 set)40.7%35.6%
FrontierMath Tier 4 (v1)22.9%4.2%

Knowledge Claude Opus 4.6 leads

Claude Opus 4.6: 61.9 (#26), Gemini 3 Flash Preview: 58.8 (#33)

BenchmarkClaude Opus 4.6Gemini 3 Flash Preview
GPQA Diamond90.5%89.4%
SimpleQA Verified47%66.8%
Vectara Hallucination Rate12.2%13.5%
LMArena Expert15461462
Humanity's Last Exam34.4%—

Multimodal Gemini 3 Flash Preview leads

Claude Opus 4.6: 37.3 (#74), Gemini 3 Flash Preview: 45.5 (#16)

BenchmarkClaude Opus 4.6Gemini 3 Flash Preview
LMArena Vision13161285
LMArena Document15071413
GeoBench—88%
VPCT—72.6%
Blueprint-Bench 2—0%
Furniture Assembly28.3%—

Multilingual Claude Opus 4.6 leads

Claude Opus 4.6: 57.9 (#6), Gemini 3 Flash Preview: 55.7 (#27)

BenchmarkClaude Opus 4.6Gemini 3 Flash Preview
LMArena Non-English14891458
LMArena Chinese15511511
LMArena French15131477
LMArena German15021497
LMArena Japanese14841489
LMArena Korean14641443
LMArena Russian14971480
LMArena Spanish15101469

Instruction Following Claude Opus 4.6 leads

Claude Opus 4.6: 79.5 (#4), Gemini 3 Flash Preview: 75.7 (#56)

BenchmarkClaude Opus 4.6Gemini 3 Flash Preview
LMArena Instruction Following15231437

Long Context Claude Opus 4.6 leads

Claude Opus 4.6: 48.1 (#13), Gemini 3 Flash Preview: 44.4 (#67)

BenchmarkClaude Opus 4.6Gemini 3 Flash Preview
LMArena Longer Query15201452
CL-bench20.7%—
CL-bench Life17%—

Writing & Preference Claude Opus 4.6 leads

Claude Opus 4.6: 73.5 (#10), Gemini 3 Flash Preview: 65.5 (#45)

BenchmarkClaude Opus 4.6Gemini 3 Flash Preview
LMArena Text15031466
LMArena Creative Writing15051457
LMArena Multi-Turn15131471
EQ-Bench Creative Writing1809—
EQ-Bench 41223—

Frequently asked questions

Is Claude Opus 4.6 better than Gemini 3 Flash Preview?

Claude Opus 4.6 is the stronger model overall, scoring 58.2 to 52.3 on the Noometry Index. Gemini 3 Flash Preview costs 8.9× less per token, which makes it the better buy when Claude Opus 4.6's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 4.6 or Gemini 3 Flash Preview?

Gemini 3 Flash Preview is cheaper. It lists at $0.50 per million input tokens and $3 per million output tokens; Claude Opus 4.6 lists at $5 and $25.

Is Claude Opus 4.6 or Gemini 3 Flash Preview better for coding?

Claude Opus 4.6 scores higher on coding benchmarks: 57.2 versus 50.9 in the Noometry coding category.

Which has the bigger context window?

Gemini 3 Flash Preview does, with 1.05M tokens against 1M.

How many benchmarks do Claude Opus 4.6 and Gemini 3 Flash Preview share?

51 benchmarks have published results for both models. Claude Opus 4.6 has 68 scored results on Noometry and Gemini 3 Flash Preview has 59.

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