Noometry

Model comparison

Claude 3 Sonnet vs GPT-5 Nano

GPT-5 Nano is the stronger model overall, scoring 33.5 to 29.0 on the Noometry Index.

Last verified . 23 shared benchmarks.

Claude 3 Sonnet Anthropic

29.0

Rank #319 Confirmed

GPT-5 Nano OpenAI

33.5

Rank #241 Confirmed

Summary

  • They share 23 benchmarks with published results for both. Claude 3 Sonnet scores higher in 3 categories and GPT-5 Nano in 6 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where GPT-5 Nano leads 29.4 to 10.7.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 3 Sonnet and 81.1% for GPT-5 Nano.

Side by side

Claude 3 SonnetGPT-5 Nano
ProviderAnthropicOpenAI
Noometry Index29.033.5
Released2024-02-292025-08-07
WeightsProprietaryProprietary
Context window—400K
Max output—128K
Input $ / M tokens—$0.05
Output $ / M tokens—$0.40
Results tracked3049

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Category by category

Coding GPT-5 Nano leads

Claude 3 Sonnet: 29.6 (#302), GPT-5 Nano: 33.6 (#254)

BenchmarkClaude 3 SonnetGPT-5 Nano
WeirdML10.2%38.1%
LMArena Coding12231351
SWE-bench Verified (bash only)—34.8%
BigCodeBench Instruct42.7%—
BigCodeBench Complete53.8%—
ALE-Bench—718.67
HumanEval+64%—
MBPP+69.3%—

Agentic & Tool Use Not comparable

Claude 3 Sonnet: —, GPT-5 Nano: 25.8 (#106)

BenchmarkClaude 3 SonnetGPT-5 Nano
Terminal-Bench—21.8%
Berkeley Function Calling Leaderboard—51.5%

Reasoning Claude 3 Sonnet leads

Claude 3 Sonnet: 20.5 (#237), GPT-5 Nano: 16.3 (#306)

BenchmarkClaude 3 SonnetGPT-5 Nano
LMArena Hard Prompts11971328
DTBench53.6%62.7%
Epoch Capabilities Index120.7139.38
ARC-AGI-2—2.6%
Kagi LLM Benchmark—62.2%
ARC-AGI-1—20.7%
Chess Puzzles—27%
Mystery Game Puzzles—9%
LMCA—7.9%
ForecastBench—59.1
WinoGrande75.1%—

Math GPT-5 Nano leads

Claude 3 Sonnet: 10.7 (#310), GPT-5 Nano: 29.4 (#241)

BenchmarkClaude 3 SonnetGPT-5 Nano
OTIS Mock AIME 2024-20252.5%81.1%
LMArena Math12131317
MATH Level 518.2%95.2%
FrontierMath (Tiers 1-3)—20%
FrontierMath Tier 4—2.4%
ProofBench—12%
Omni-MATH—54.6%
FrontierMath (Feb 2025 set)—8.3%
FrontierMath Tier 4 (v1)—2.1%

Knowledge GPT-5 Nano leads

Claude 3 Sonnet: 21.1 (#276), GPT-5 Nano: 35.9 (#178)

BenchmarkClaude 3 SonnetGPT-5 Nano
GPQA Diamond40.6%69.4%
LMArena Expert11731321
SimpleQA Verified—11.7%
MMLU-Pro—77.8%
Vectara Hallucination Rate—10.5%
GPQA (HELM)—67.9%
MMLU75.9%—

Multimodal GPT-5 Nano leads

Claude 3 Sonnet: 25.2 (#125), GPT-5 Nano: 31.3 (#108)

BenchmarkClaude 3 SonnetGPT-5 Nano
LMArena Vision9841159
VPCT—37.2%

Multilingual GPT-5 Nano leads

Claude 3 Sonnet: 37.8 (#234), GPT-5 Nano: 45.3 (#172)

BenchmarkClaude 3 SonnetGPT-5 Nano
LMArena Non-English12051313
LMArena Chinese11891356
LMArena German12041327
LMArena Japanese11311226
LMArena Korean11281269
LMArena Russian12271296
LMArena Spanish12041360
LMArena French1229—

Instruction Following GPT-5 Nano leads

Claude 3 Sonnet: 62.8 (#235), GPT-5 Nano: 75.0 (#79)

BenchmarkClaude 3 SonnetGPT-5 Nano
LMArena Instruction Following11991306
IFEval—93.2%

Long Context Claude 3 Sonnet leads

Claude 3 Sonnet: 36.7 (#228), GPT-5 Nano: 31.3 (#281)

BenchmarkClaude 3 SonnetGPT-5 Nano
LMArena Longer Query12111312
Fiction.LiveBench—44.4%

Writing & Preference Claude 3 Sonnet leads

Claude 3 Sonnet: 42.1 (#238), GPT-5 Nano: 39.1 (#249)

BenchmarkClaude 3 SonnetGPT-5 Nano
LMArena Text12181320
LMArena Creative Writing11861249
LMArena Multi-Turn12271311
EQ-Bench Creative Writing—705
WildBench—80.6%

Frequently asked questions

Is Claude 3 Sonnet better than GPT-5 Nano?

GPT-5 Nano is the stronger model overall, scoring 33.5 to 29.0 on the Noometry Index.

Is Claude 3 Sonnet or GPT-5 Nano better for coding?

GPT-5 Nano scores higher on coding benchmarks: 33.6 versus 29.6 in the Noometry coding category.

How many benchmarks do Claude 3 Sonnet and GPT-5 Nano share?

23 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and GPT-5 Nano has 49.

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