Noometry

Model comparison

Claude 3 Sonnet vs o3

o3 is the stronger model overall, scoring 47.5 to 29.0 on the Noometry Index.

Last verified . 24 shared benchmarks.

Claude 3 Sonnet Anthropic

29.0

Rank #319 Confirmed

o3 OpenAI

47.5

Rank #61 Confirmed

Summary

  • They share 24 benchmarks with published results for both. Claude 3 Sonnet scores higher in 0 categories and o3 in 9 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where o3 leads 50.2 to 10.7.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 3 Sonnet and 84.4% for o3.

Side by side

Claude 3 Sonneto3
ProviderAnthropicOpenAI
Noometry Index29.047.5
Released2024-02-292025-04-16
WeightsProprietaryProprietary
Context window—200K
Max output—100K
Input $ / M tokens—$2
Output $ / M tokens—$8
Results tracked3063

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Category by category

Coding o3 leads

Claude 3 Sonnet: 29.6 (#302), o3: 46.8 (#64)

BenchmarkClaude 3 Sonneto3
WeirdML10.2%52.4%
LMArena Coding12231408
SWE-bench Verified—62.3%
SWE-bench Verified (bash only)—58.4%
Aider Polyglot—81.3%
GSO—8.8%
BigCodeBench Instruct42.7%—
BigCodeBench Complete53.8%—
CadEval—74%
ALE-Bench—933.55
HumanEval+64%—
MBPP+69.3%—

Agentic & Tool Use Not comparable

Claude 3 Sonnet: —, o3: 34.5 (#44)

BenchmarkClaude 3 Sonneto3
Berkeley Function Calling Leaderboard—63%
GDPval—30.8%
DeepResearch Bench—45.2%
OSWorld—23%
LMArena Search—1144
METR Time Horizons—65.4%

Reasoning o3 leads

Claude 3 Sonnet: 20.5 (#237), o3: 32.0 (#78)

BenchmarkClaude 3 Sonneto3
LMArena Hard Prompts11971402
DTBench53.6%84.8%
Epoch Capabilities Index120.7146.86
ARC-AGI-2—6.5%
SimpleBench—53.1%
Kagi LLM Benchmark—67.6%
ARC-AGI-1—60.8%
CritPt—1.4%
Chess Puzzles—38%
EnigmaEval—13.1%
Mystery Game Puzzles—29%
LMCA—39.7%
ForecastBench—62.5
WinoGrande75.1%—

Math o3 leads

Claude 3 Sonnet: 10.7 (#310), o3: 50.2 (#58)

BenchmarkClaude 3 Sonneto3
OTIS Mock AIME 2024-20252.5%84.4%
LMArena Math12131426
MATH Level 518.2%97.8%
FrontierMath (Tiers 1-3)—33.3%
Omni-MATH—71.4%
FrontierMath (Feb 2025 set)—18.7%
FrontierMath Tier 4 (v1)—2.1%

Knowledge o3 leads

Claude 3 Sonnet: 21.1 (#276), o3: 54.6 (#52)

BenchmarkClaude 3 Sonneto3
GPQA Diamond40.6%81.8%
LMArena Expert11731402
Humanity's Last Exam—20.3%
SimpleQA Verified—49.4%
MMLU-Pro—85.9%
Confabulations—14.4%
GPQA (HELM)—75.3%
MMLU75.9%—

Multimodal o3 leads

Claude 3 Sonnet: 25.2 (#125), o3: 41.4 (#36)

BenchmarkClaude 3 Sonneto3
LMArena Vision9841214
GeoBench—74%
VPCT—52%

Multilingual o3 leads

Claude 3 Sonnet: 37.8 (#234), o3: 51.7 (#105)

BenchmarkClaude 3 Sonneto3
LMArena Non-English12051401
LMArena Chinese11891437
LMArena French12291430
LMArena German12041420
LMArena Japanese11311403
LMArena Korean11281370
LMArena Russian12271406
LMArena Spanish12041395

Instruction Following o3 leads

Claude 3 Sonnet: 62.8 (#235), o3: 72.8 (#127)

BenchmarkClaude 3 Sonneto3
LMArena Instruction Following11991368
IFEval—86.9%

Long Context o3 leads

Claude 3 Sonnet: 36.7 (#228), o3: 53.3 (#6)

BenchmarkClaude 3 Sonneto3
LMArena Longer Query12111372
Fiction.LiveBench—88.9%
CL-bench—17.8%

Writing & Preference o3 leads

Claude 3 Sonnet: 42.1 (#238), o3: 63.5 (#64)

BenchmarkClaude 3 Sonneto3
LMArena Text12181410
LMArena Creative Writing11861359
LMArena Multi-Turn12271405
Short-Story Creative Writing—83.9%
EQ-Bench Creative Writing—1676
WildBench—86.1%

Frequently asked questions

Is Claude 3 Sonnet better than o3?

o3 is the stronger model overall, scoring 47.5 to 29.0 on the Noometry Index.

Is Claude 3 Sonnet or o3 better for coding?

o3 scores higher on coding benchmarks: 46.8 versus 29.6 in the Noometry coding category.

How many benchmarks do Claude 3 Sonnet and o3 share?

24 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and o3 has 63.

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