Sponsored byFusecodeEnterprise coding API for Claude Code, Codex, and model workflows.
LogoLMSpeed
Back to models

Model compare

Claude Sonnet 4.6 vs O3 Mini

The readout for Claude Sonnet 4.6 and O3 Mini, before the detailed comparison sheet.

Model A

Claude Sonnet 4.6

Anthropic

Leading
vs

Model B

O3 Mini

OpenAI

Contender

Key Takeaways

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

Decision read

Claude Sonnet 4.6

Claude Sonnet 4.6 has the higher weighted result; Model A / B score 73.3 to 26.7.

Evidence depth

97 data points

Includes 16 benchmark rows, 0 audit samples, and 10 provider examples.

Selection signal

Start with Claude Sonnet 4.6

The charts below split 26 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 Sonnet 4.6 and O3 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare
Claude Sonnet 4.6
O3 Mini
Overall leaderLeadingContender
Weighted overall score73.3 pts26.7 pts
Benchmark category leads4 categories2 categories
Operational advantagesCheapest input price, Average speed, First-token latency, Free providers, Provider coverageNo data
Context window1M tokens200K tokens
Max output128K tokens100K tokens
Modalities

Input

TextImageFile

Output

Text

Input

TextFile

Output

Text
Features
Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning
Text inputFile 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 Sonnet 4.6
O3 Mini
DeveloperAnthropicOpenAI
ReleasedFeb 2026Feb 2025
ParametersNo dataNo data
TokenizerClaudeGPT
Knowledge cutoffNo data2023-10-31
OpenRouter IDanthropic/claude-sonnet-4.6openai/o3-mini
ReferencesNo dataNo data

When to choose each model

This report only uses LMSpeed data for Claude Sonnet 4.6 and O3 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Claude Sonnet 4.6

Claude Sonnet 4.6 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge) and operational dimensions (Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage).

O3 Mini

O3 Mini leads these benchmark categories: Math, Instruction following.

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
7 / 8
Model B coverage
6 / 8
Shared
6 shared categories

Avg. score

Claude Sonnet 4.6

53.1

Avg. score

O3 Mini

48.6

Agents

Claude Sonnet 4.6 leads by 13.0

Claude Sonnet 4.652.7
O3 Mini39.7

Coding

Claude Sonnet 4.6 leads by 15.4

Claude Sonnet 4.655.9
O3 Mini40.5

Reasoning

Claude Sonnet 4.6 leads by 0.4

Claude Sonnet 4.649.8
O3 Mini49.4

Knowledge

Claude Sonnet 4.6 leads by 22.8

Claude Sonnet 4.670.6
O3 Mini47.8

Math

O3 Mini leads by 5.3

Claude Sonnet 4.653.2
O3 Mini58.5

Multilingual

No data

Claude Sonnet 4.6-
O3 Mini-

Multimodal

Claude Sonnet 4.6

Claude Sonnet 4.645.7
O3 Mini-

Instruction following

O3 Mini leads by 11.9

Claude Sonnet 4.643.7
O3 Mini55.6

Professional benchmark details

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

Aggregatereported

BenchLM overall score

SourceClaude Sonnet 4.6

Claude Sonnet 4.6

winner

59.0

Rank #39/100 · confidence 3 · eval date 2026-02-01

+8.0

O3 Mini

51.0

Rank #67/100 · confidence 1 · eval date 2025-01-31

Pricingverified

Input price

SourceClaude Sonnet 4.6 (Adaptive Reasoning, Max Effort)

Claude Sonnet 4.6

$3.00/M

Rank #155/180 · confidence 4

+$1.90/M

O3 Mini

winner

$1.10/M

Rank #114/180 · confidence 4

Pricingverified

Blended price

SourceClaude Sonnet 4.6 (Adaptive Reasoning, Max Effort)

Claude Sonnet 4.6

$6.00/M

Rank #155/180 · confidence 4

+$4.08/M

O3 Mini

winner

$1.93/M

Rank #115/180 · confidence 4

Pricingverified

Output price

SourceClaude Sonnet 4.6 (Adaptive Reasoning, Max Effort)

Claude Sonnet 4.6

$15.00/M

Rank #155/180 · confidence 4

+$10.60/M

O3 Mini

winner

$4.40/M

Rank #115/180 · confidence 4

Reasoningverified

HLE

SourceClaude Sonnet 4.6 (Adaptive Reasoning, Max Effort)

Claude Sonnet 4.6

winner

33.6%

Rank #44/209 · confidence 4

+25.7%

O3 Mini

7.9%

Rank #128/209 · confidence 4

Reasoningverified

GPQA

SourceClaude Sonnet 4.6 (Adaptive Reasoning, Max Effort)

Claude Sonnet 4.6

winner

87.5%

Rank #46/212 · confidence 4

+12.7%

O3 Mini

74.8%

Rank #117/212 · confidence 4

Reasoningreported

MMLU-Pro

SourceClaude Sonnet 4.6

Claude Sonnet 4.6

winner

79.2%

Rank #69/129 · confidence 3 · eval date 2026-02-01

+0.1%

O3 Mini

79.1%

Rank #70/129 · confidence 4

Codingreported

BenchLM Coding score

SourceClaude Sonnet 4.6

Claude Sonnet 4.6

winner

63.2

Rank #10/81 · confidence 3 · eval date 2026-02-01

+41.9

O3 Mini

21.3

Rank #80/81 · confidence 1 · eval date 2025-01-31

Codingreported

SWE-bench Verified

SourceClaude Sonnet 4.6

Claude Sonnet 4.6

winner

79.6

Rank #15/49 · confidence 3 · eval date 2026-02-01

+30.3

O3 Mini

49.3

Rank #46/49 · confidence 1 · eval date 2025-01-31

Codingverified

SciCode

SourceClaude Sonnet 4.6 (Adaptive Reasoning, Max Effort)

Claude Sonnet 4.6

winner

46.8%

Rank #39/205 · confidence 4

+6.9%

O3 Mini

39.9%

Rank #86/205 · confidence 4

Codingreported

AA-SciCode

SourceClaude Sonnet 4.6

Claude Sonnet 4.6

winner

46.9

Rank #42/108 · confidence 3 · eval date 2026-02-01

+7.0

O3 Mini

39.9

Rank #70/108 · confidence 1 · eval date 2025-01-31

Knowledgereported

BenchLM Knowledge score

SourceClaude Sonnet 4.6

Claude Sonnet 4.6

winner

76.1

Rank #19/69 · confidence 3 · eval date 2026-02-01

+10.5

O3 Mini

65.6

Rank #38/69 · confidence 1 · eval date 2025-01-31

Knowledgereported

Artificial Analysis Intelligence Index

SourceClaude Sonnet 4.6

Claude Sonnet 4.6

winner

36.8

Rank #54/111 · confidence 3 · eval date 2026-02-01

+17.6

O3 Mini

19.2

Rank #87/111 · confidence 1 · eval date 2025-01-31

Knowledgereported

AA-GPQA Diamond

SourceClaude Sonnet 4.6

Claude Sonnet 4.6

winner

79.9

Rank #74/108 · confidence 3 · eval date 2026-02-01

+5.1

O3 Mini

74.8

Rank #82/108 · confidence 1 · eval date 2025-01-31

Knowledgereported

AA-HLE

SourceClaude Sonnet 4.6

Claude Sonnet 4.6

winner

13.3

Rank #76/108 · confidence 3 · eval date 2026-02-01

+5.4

O3 Mini

7.9

Rank #83/108 · confidence 1 · eval date 2025-01-31

Agentsreported

τ²-bench results

SourceClaude Sonnet 4.6

Claude Sonnet 4.6

winner

79.5

Rank #55/82 · confidence 3 · eval date 2026-02-01

+50.8

O3 Mini

28.7

Rank #72/82 · confidence 1 · eval date 2025-01-31

API audit comparison

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

Provider
Claude Sonnet 4.6
O3 Mini
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 Sonnet 4.6
O3 Mini
丸美小沐25 tests

Claude Sonnet 4.6

speed / latency

N/A / N/A

input / output

No data

O3 Mini

speed / latency

66 tok/s / 6491ms

input / output

No data

N1N10 tests

Claude Sonnet 4.6

speed / latency

55 tok/s / 2094ms

input / output

No data

O3 Mini

speed / latency

117 tok/s / 4809ms

input / output

No data

ZetaTechs API6 tests

Claude Sonnet 4.6

speed / latency

N/A / N/A

input / output

No data

O3 Mini

speed / latency

44 tok/s / 17418ms

input / output

No data

EasyMore5 tests

Claude Sonnet 4.6

speed / latency

27 tok/s / 11925ms

input / output

No data

O3 Mini

speed / latency

N/A / N/A

input / output

No data

数标标API-FS5 tests

Claude Sonnet 4.6

speed / latency

47 tok/s / 1068ms

input / output

No data

O3 Mini

speed / latency

N/A / N/A

input / output

No data

兔子API

Claude Sonnet 4.6

claude-sonnet-4-6

speed / latency

No data

input / output

$0/request

O3 Mini

o3-mini

speed / latency

No data

input / output

$0/request

KKSJ-AI

Claude Sonnet 4.6

claude-sonnet-4-6

speed / latency

No data

input / output

$9.25/M/$46.23/M

O3 Mini

o3-mini-all

speed / latency

No data

input / output

$0.0062/request

PoloAPI

Claude Sonnet 4.6

claude-sonnet-4-6-c

speed / latency

No data

input / output

$0.0082/request

O3 Mini

o3-mini-high

speed / latency

No data

input / output

$0.011/request

Gpt API

Claude Sonnet 4.6

claude-sonnet-4-6

speed / latency

No data

input / output

$0.0086/M/$0.043/M

O3 Mini

o3-mini-2025-01-31-high

speed / latency

No data

input / output

$0.214/M/$0.857/M

KFCV50

Claude Sonnet 4.6

claude-sonnet-4-6

speed / latency

No data

input / output

$0.010/request

O3 Mini

o3-mini-2025-01-31

speed / latency

No data

input / output

$0.075/M/$0.301/M

FAQ

Weighted outcome: Claude Sonnet 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.