Noometry

Model comparison

Claude Sonnet 5.5 vs GPT-4

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 29.1 on the Noometry Index.

Last verified . 16 shared benchmarks.

Claude Sonnet 5.5 Anthropic

61.9

Rank #10 Confirmed

GPT-4 OpenAI

29.1

Rank #316 Confirmed

Summary

  • They share 16 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 8 categories and GPT-4 in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 10.8.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Sonnet 5.5 and 1.1% for GPT-4.
  • Claude Sonnet 5.5 is cheaper at $2 / $10 per million input/output tokens, against $30 / $60 for GPT-4.
  • Claude Sonnet 5.5 accepts more context: 1M tokens versus 8K.

Side by side

Claude Sonnet 5.5GPT-4
ProviderAnthropicOpenAI
Noometry Index61.929.1
Released2026-09-282023-03-14
WeightsProprietaryProprietary
Context window1M8K
Max output128K8K
Input $ / M tokens$2$30
Output $ / M tokens$10$60
Results tracked3238

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Category by category

Coding Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 67.3 (#6), GPT-4: 31.6 (#283)

BenchmarkClaude Sonnet 5.5GPT-4
LMArena Coding15131254
FrontierCode52.1%—
CursorBench55.5%—
LMArena WebDev1774—
FrontierSWE61.9%—
SciCode61%—
WeirdML—12.4%
BigCodeBench Instruct—46%
BigCodeBench Complete—57.2%
ALE-Bench1,819—
HumanEval+—79.3%

Agentic & Tool Use Not comparable

Claude Sonnet 5.5: 45.0 (#16), GPT-4: —

BenchmarkClaude Sonnet 5.5GPT-4
APEX-Agents75.5%—
METR Time Horizons—36.1%

Reasoning Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 54.0 (#28), GPT-4: 17.8 (#289)

BenchmarkClaude Sonnet 5.5GPT-4
LMArena Hard Prompts14951241
Mystery Game Puzzles65%12%
Epoch Capabilities Index165.03125.89
NYT Connections (extended)80.5%—
CritPt31.4%—
Chess Puzzles—4%
DTBench—62.7%
LMCA—17.1%
BIG-Bench Hard—75.1%
ForecastBench—57.8
HellaSwag—95.3%
WinoGrande—87.5%

Math Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 87.9 (#6), GPT-4: 10.8 (#309)

BenchmarkClaude Sonnet 5.5GPT-4
OTIS Mock AIME 2024-2025100%1.1%
LMArena Math15101269
FrontierMath (Tiers 1-3)88.8%—
FrontierMath Tier 480.5%—
ProofBench100%—
MATH Level 5—23%
FrontierMath Erdős2.9%—
GSM8K—92%

Knowledge Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 66.0 (#12), GPT-4: 18.4 (#282)

BenchmarkClaude Sonnet 5.5GPT-4
GPQA Diamond95.6%35.7%
LMArena Expert15401211
SimpleQA Verified46.5%—
MMLU—86.4%
TriviaQA—84.8%

Multimodal Not comparable

Claude Sonnet 5.5: 51.5 (#6), GPT-4: —

BenchmarkClaude Sonnet 5.5GPT-4
LMArena Vision1289—
Furniture Assembly75%—

Multilingual Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 55.3 (#30), GPT-4: 40.6 (#215)

BenchmarkClaude Sonnet 5.5GPT-4
LMArena Non-English14521246
LMArena Chinese15221242
LMArena Russian14511251
LMArena French—1283
LMArena German—1251
LMArena Japanese—1209
LMArena Korean—1184
LMArena Spanish—1261

Instruction Following Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 78.3 (#11), GPT-4: 65.3 (#222)

BenchmarkClaude Sonnet 5.5GPT-4
LMArena Instruction Following14951241

Long Context Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 45.9 (#28), GPT-4: 37.7 (#212)

BenchmarkClaude Sonnet 5.5GPT-4
LMArena Longer Query14981244

Writing & Preference Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 66.0 (#40), GPT-4: 34.9 (#268)

BenchmarkClaude Sonnet 5.5GPT-4
LMArena Text14711263
LMArena Creative Writing14651244
LMArena Multi-Turn14741257
EQ-Bench Creative Writing—752

Frequently asked questions

Is Claude Sonnet 5.5 better than GPT-4?

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 29.1 on the Noometry Index.

Which is cheaper, Claude Sonnet 5.5 or GPT-4?

Claude Sonnet 5.5 is cheaper. It lists at $2 per million input tokens and $10 per million output tokens; GPT-4 lists at $30 and $60.

Is Claude Sonnet 5.5 or GPT-4 better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 31.6 in the Noometry coding category.

Which has the bigger context window?

Claude Sonnet 5.5 does, with 1M tokens against 8K.

How many benchmarks do Claude Sonnet 5.5 and GPT-4 share?

16 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and GPT-4 has 38.

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