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Claude Opus 4.6 vs Gemini 3 Flash

The readout for Claude Opus 4.6 and Gemini 3 Flash, before the detailed comparison sheet.

Model A

Claude Opus 4.6

Anthropic

Leading
vs

Model B

Gemini 3 Flash

Google

Contender

Key Takeaways

Weighted outcome: Claude Opus 4.6. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Decision read

Claude Opus 4.6

Claude Opus 4.6 has the higher weighted result; Model A / B score 52 to 48.

Evidence depth

128 data points

Includes 32 benchmark rows, 0 audit samples, and 10 provider examples.

Selection signal

Start with Claude Opus 4.6

The charts below split 42 high-signal samples across speed, scores, and audit health.

Change comparison

Switch either side of this report to compare another model with the same LMSpeed data pipeline.

Select a different model to open a new comparison URL.

Comparison sheet

This report only uses LMSpeed data for Claude Opus 4.6 and Gemini 3 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare
Claude Opus 4.6
Gemini 3 Flash
Overall leaderLeadingContender
Weighted overall score52.0 pts48.0 pts
Benchmark category leads4 categories4 categories
Operational advantagesFirst-token latency, Free providers, Provider coverageCheapest input price, Average speed
Context window1M tokens1.0M tokens
Max output128K tokens65.5K tokens
Modalities

Input

TextImageFile

Output

Text

Input

TextImageFileAudiovideo

Output

Text
Features
Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning
Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning

The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.

Model metadata

Model compare
Claude Opus 4.6
Gemini 3 Flash
DeveloperAnthropicGoogle
ReleasedFeb 2026Dec 2025
ParametersNo dataNo data
TokenizerClaudeGemini
Knowledge cutoffNo dataNo data
OpenRouter IDanthropic/claude-opus-4.6google/gemini-3-flash-preview
ReferencesNo dataNo data

When to choose each model

This report only uses LMSpeed data for Claude Opus 4.6 and Gemini 3 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Claude Opus 4.6

Claude Opus 4.6 is stronger in benchmark categories (Agents, Coding, Reasoning, Math) and operational dimensions (First-token latency, Free providers, Provider coverage).

Gemini 3 Flash

Gemini 3 Flash is stronger in benchmark categories (Knowledge, Multilingual, Multimodal, Instruction following) and operational dimensions (Cheapest input price, Average speed).

Benchmark score comparison

Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.

Category performance

Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.

Model A coverage
8 / 8
Model B coverage
8 / 8
Shared
8 shared categories

Avg. score

Claude Opus 4.6

51.8

Avg. score

Gemini 3 Flash

51.3

Agents

Claude Opus 4.6 leads by 11.2

Claude Opus 4.654.3
Gemini 3 Flash43.1

Coding

Claude Opus 4.6 leads by 3.9

Claude Opus 4.656.6
Gemini 3 Flash52.7

Reasoning

Claude Opus 4.6 leads by 1.4

Claude Opus 4.653.4
Gemini 3 Flash52

Knowledge

Gemini 3 Flash leads by 0.4

Claude Opus 4.653.3
Gemini 3 Flash53.7

Math

Claude Opus 4.6 leads by 4.2

Claude Opus 4.655.7
Gemini 3 Flash51.5

Multilingual

Gemini 3 Flash leads by 10.1

Claude Opus 4.648.4
Gemini 3 Flash58.5

Multimodal

Gemini 3 Flash leads by 3.1

Claude Opus 4.647.8
Gemini 3 Flash50.9

Instruction following

Gemini 3 Flash leads by 3.1

Claude Opus 4.644.8
Gemini 3 Flash47.9

Professional benchmark details

Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.

Aggregatereported

BenchLM overall score

SourceClaude Opus 4.6

Claude Opus 4.6

62.0

Rank #42/112 · confidence 4 · eval date 2026-02-01

+3.0

Gemini 3 Flash

winner

65.0

Rank #38/112 · confidence 3 · eval date 2025-12-01

Pricingverified

Input price

SourceClaude Opus 4.6 (Non-reasoning, High Effort)

Claude Opus 4.6

$5.00/M

Rank #168/186 · confidence 4

+$4.50/M

Gemini 3 Flash

winner

$0.500/M

Rank #85/186 · confidence 4

Pricingverified

Blended price

SourceClaude Opus 4.6 (Non-reasoning, High Effort)

Claude Opus 4.6

$10.00/M

Rank #169/186 · confidence 4

+$8.88/M

Gemini 3 Flash

winner

$1.13/M

Rank #97/186 · confidence 4

Pricingverified

Output price

SourceClaude Opus 4.6 (Non-reasoning, High Effort)

Claude Opus 4.6

$25.00/M

Rank #169/186 · confidence 4

+$22.00/M

Gemini 3 Flash

winner

$3.00/M

Rank #99/186 · confidence 4

Reasoningreported

MMLU-Pro

SourceClaude Opus 4.6

Claude Opus 4.6

82.0%

Rank #50/129 · confidence 4 · eval date 2026-02-01

+6.2%

Gemini 3 Flash

winner

88.2%

Rank #7/129 · confidence 4

Reasoningreported

BenchLM Reasoning score

SourceClaude Opus 4.6

Claude Opus 4.6

winner

67.1

Rank #42/67 · confidence 4 · eval date 2026-02-01

+8.1

Gemini 3 Flash

59.0

Rank #50/67 · confidence 3 · eval date 2025-12-01

Reasoningreported

CritPt

SourceClaude Opus 4.6

Claude Opus 4.6

winner

2.8

Rank #57/88 · confidence 4 · eval date 2026-02-01

+1.4

Gemini 3 Flash

1.4

Rank #65/88 · confidence 3 · eval date 2025-12-01

Reasoningreported

AA-LCR

SourceClaude Opus 4.6

Claude Opus 4.6

winner

67.0

Rank #71/106 · confidence 4 · eval date 2026-02-01

+11.7

Gemini 3 Flash

55.3

Rank #83/106 · confidence 3 · eval date 2025-12-01

Reasoningverified

GPQA

SourceClaude Opus 4.6 (Non-reasoning, High Effort)

Claude Opus 4.6

winner

84.0%

Rank #75/218 · confidence 4

+2.8%

Gemini 3 Flash

81.2%

Rank #95/218 · confidence 4

Reasoningverified

HLE

SourceClaude Opus 4.6 (Non-reasoning, High Effort)

Claude Opus 4.6

winner

19.1%

Rank #89/216 · confidence 4

+4.1%

Gemini 3 Flash

15.0%

Rank #102/216 · confidence 4

Codingreported

Vibe Code Bench

SourceClaude Opus 4.6

Claude Opus 4.6

winner

57.6

Rank #5/33 · confidence 4 · eval date 2026-02-01

+37.4

Gemini 3 Flash

20.2

Rank #21/33 · confidence 3 · eval date 2025-12-01

Codingreported

BenchLM Coding score

SourceClaude Opus 4.6

Claude Opus 4.6

50.3

Rank #54/87 · confidence 4 · eval date 2026-02-01

+16.4

Gemini 3 Flash

winner

66.7

Rank #16/87 · confidence 3 · eval date 2025-12-01

Codingreported

AA-SciCode

SourceClaude Opus 4.6

Claude Opus 4.6

45.7

Rank #54/113 · confidence 4 · eval date 2026-02-01

+4.2

Gemini 3 Flash

winner

49.9

Rank #36/113 · confidence 1 · eval date 2025-12-01

Mathreported

FrontierMath v2 (Tiers 1-3)

SourceClaude Opus 4.6

Claude Opus 4.6

winner

40.7

Rank #10/47 · confidence 4 · eval date 2026-02-01

+5.1

Gemini 3 Flash

35.6

Rank #16/47 · confidence 1 · eval date 2025-12-01

Mathreported

FrontierMath v2 (Tier 4)

SourceClaude Opus 4.6

Claude Opus 4.6

winner

22.9

Rank #11/36 · confidence 4 · eval date 2026-02-01

+18.7

Gemini 3 Flash

4.2

Rank #24/36 · confidence 1 · eval date 2025-12-01

Mathreported

BenchLM Math score

SourceClaude Opus 4.6

Claude Opus 4.6

winner

58.6

Rank #29/63 · confidence 4 · eval date 2026-02-01

+8.4

Gemini 3 Flash

50.2

Rank #36/63 · confidence 3 · eval date 2025-12-01

Knowledgereported

AA-Omniscience Hallucination Rate

SourceClaude Opus 4.6

Claude Opus 4.6

80.1

Rank #43/106 · confidence 4 · eval date 2026-02-01

+12.3

Gemini 3 Flash

winner

92.4

Rank #11/106 · confidence 3 · eval date 2025-12-01

Knowledgereported

BenchLM Knowledge score

SourceClaude Opus 4.6

Claude Opus 4.6

winner

79.8

Rank #15/83 · confidence 4 · eval date 2026-02-01

+3.2

Gemini 3 Flash

76.6

Rank #25/83 · confidence 3 · eval date 2025-12-01

Knowledgereported

AA-Omniscience Accuracy

SourceClaude Opus 4.6

Claude Opus 4.6

45.8

Rank #23/106 · confidence 4 · eval date 2026-02-01

0.0

Gemini 3 Flash

45.8

Rank #23/106 · confidence 3 · eval date 2025-12-01

Knowledgereported

Artificial Analysis Intelligence Index

SourceClaude Opus 4.6

Claude Opus 4.6

winner

26.4

Rank #57/117 · confidence 4 · eval date 2026-02-01

+8.4

Gemini 3 Flash

17.9

Rank #92/117 · confidence 3 · eval date 2025-12-01

Knowledgereported

AA-GPQA Diamond

SourceClaude Opus 4.6

Claude Opus 4.6

winner

84.0

Rank #67/113 · confidence 4 · eval date 2026-02-01

+2.8

Gemini 3 Flash

81.2

Rank #75/113 · confidence 3 · eval date 2025-12-01

Knowledgereported

AA-HLE

SourceClaude Opus 4.6

Claude Opus 4.6

winner

19.1

Rank #74/114 · confidence 4 · eval date 2026-02-01

+4.1

Gemini 3 Flash

15.0

Rank #79/114 · confidence 3 · eval date 2025-12-01

Multilingualreported

AA Global-MMLU-Lite

SourceClaude Opus 4.6 (Adaptive)

Claude Opus 4.6

92.2

Rank #3/5 · confidence 1 · eval date 2026-02-01

+0.5

Gemini 3 Flash

winner

92.7

Rank #2/5 · confidence 3 · eval date 2025-12-01

Multimodalreported

Design Arena Website

SourceClaude Opus 4.6

Claude Opus 4.6

winner

1304.0

Rank #14/78 · confidence 4 · eval date 2026-02-01

+94.0

Gemini 3 Flash

1210.0

Rank #46/78 · confidence 3 · eval date 2025-12-01

Multimodalreported

AA-MMMU-Pro

SourceClaude Opus 4.6

Claude Opus 4.6

72.5

Rank #45/68 · confidence 4 · eval date 2026-02-01

+6.1

Gemini 3 Flash

winner

78.6

Rank #19/68 · confidence 3 · eval date 2025-12-01

Multimodalreported

BenchLM Multimodal Grounded score

SourceClaude Opus 4.6

Claude Opus 4.6

59.5

Rank #40/56 · confidence 4 · eval date 2026-02-01

+16.3

Gemini 3 Flash

winner

75.8

Rank #19/56 · confidence 3 · eval date 2025-12-01

Instruction followingreported

BenchLM Instruction Following score

SourceClaude Opus 4.6

Claude Opus 4.6

52.6

Rank #49/52 · confidence 4 · eval date 2026-02-01

+13.6

Gemini 3 Flash

winner

66.2

Rank #46/52 · confidence 3 · eval date 2025-12-01

Instruction followingreported

AA-IFBench

SourceClaude Opus 4.6

Claude Opus 4.6

44.6

Rank #59/84 · confidence 4 · eval date 2026-02-01

+10.5

Gemini 3 Flash

winner

55.1

Rank #53/84 · confidence 3 · eval date 2025-12-01

Agentsreported

Claw-Eval

SourceClaude Opus 4.6

Claude Opus 4.6

winner

70.4

Rank #3/27 · confidence 4 · eval date 2026-02-01

+21.2

Gemini 3 Flash

49.2

Rank #24/27 · confidence 3 · eval date 2025-12-01

Agentsreported

JobBench

SourceClaude Opus 4.6

Claude Opus 4.6

winner

36.7

Rank #9/24 · confidence 4 · eval date 2026-02-01

+25.3

Gemini 3 Flash

11.4

Rank #21/24 · confidence 3 · eval date 2025-12-01

Agentsreported

Gert Labs

SourceClaude Opus 4.6

Claude Opus 4.6

winner

61.9

Rank #10/49 · confidence 4 · eval date 2026-02-01

+5.2

Gemini 3 Flash

56.6

Rank #16/49 · confidence 3 · eval date 2025-12-01

Agentsreported

τ²-bench results

SourceClaude Opus 4.6

Claude Opus 4.6

winner

84.8

Rank #46/82 · confidence 4 · eval date 2026-02-01

+41.5

Gemini 3 Flash

43.3

Rank #69/82 · confidence 3 · eval date 2025-12-01

API audit comparison

Latest completed audits from shared providers, with four safety and integrity score groups plus report links.

Provider
Claude Opus 4.6
Gemini 3 Flash
No completed audits are available from shared providers yet.

Provider examples

Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.

Provider
Claude Opus 4.6
Gemini 3 Flash
TanAPI40 tests

Claude Opus 4.6

speed / latency

N/A / N/A

input / output

No data

Gemini 3 Flash

speed / latency

269 tok/s / 4314ms

input / output

No data

CatClaw API30 tests

Claude Opus 4.6

speed / latency

N/A / N/A

input / output

No data

Gemini 3 Flash

speed / latency

129 tok/s / 10293ms

input / output

No data

丰思理 AI30 tests

Claude Opus 4.6

speed / latency

N/A / N/A

input / output

No data

Gemini 3 Flash

speed / latency

159 tok/s / 6256ms

input / output

No data

N1N25 tests

Claude Opus 4.6

speed / latency

46 tok/s / 2559ms

input / output

No data

Gemini 3 Flash

speed / latency

157 tok/s / 7994ms

input / output

No data

Rnglg2 API25 tests

Claude Opus 4.6

speed / latency

57 tok/s / 3926ms

input / output

No data

Gemini 3 Flash

speed / latency

160 tok/s / 6933ms

input / output

No data

兔子API

Claude Opus 4.6

claude-opus-4-6-medium

speed / latency

No data

input / output

$0/request

Gemini 3 Flash

gemini-3-flash-preview-nothinking

speed / latency

No data

input / output

$0/request

MyDamoxing

Claude Opus 4.6

claude-opus-4-6

speed / latency

No data

input / output

$0.068/M/$0.342/M

Gemini 3 Flash

gemini-3-flash

speed / latency

No data

input / output

$0.0014/M/$0.0082/M

10dian-API

Claude Opus 4.6

anti/claude-opus-4-6-c

speed / latency

No data

input / output

$0.200/request

Gemini 3 Flash

r/gemini-3-flash-preview-c

speed / latency

No data

input / output

$0.0020/request

PoloAPI

Claude Opus 4.6

claude-opus-4-6-c

speed / latency

No data

input / output

$0.027/request

Gemini 3 Flash

gemini-3-flash-preview-c

speed / latency

No data

input / output

$0.0027/request

碳硅生命体

Claude Opus 4.6

claude-opus-4-6

speed / latency

No data

input / output

$2.00/M/$10.00/M

Gemini 3 Flash

gemini-3-flash-c

speed / latency

No data

input / output

$0.0030/request

FAQ

Weighted outcome: Claude Opus 4.6. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Why is this comparison indexable?
It has 6 verifiable comparison points, and both models have pricing or benchmark data.
Are missing metrics invented?
No. Metrics without LMSpeed data are omitted from this report.

Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.