Noometry

Model comparison

Claude 3 Sonnet vs Claude Sonnet 5.5

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 28.8 on the Noometry Index.

Last verified . 2 shared benchmarks.

Claude 3 Sonnet Anthropic

28.8

Rank #311 Confirmed

Claude Sonnet 5.5 Anthropic

60.5

Rank #10 Confirmed

Summary

  • They share 2 benchmarks with published results for both. Claude 3 Sonnet scores higher in 0 categories and Claude Sonnet 5.5 in 5 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 10.0.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 3 Sonnet and 100% for Claude Sonnet 5.5.

Side by side

Claude 3 SonnetClaude Sonnet 5.5
ProviderAnthropicAnthropic
Noometry Index28.860.5
Released2024-02-292026-09-28
WeightsProprietaryProprietary
Context window—1M
Max output—128K
Input $ / M tokens—$2
Output $ / M tokens—$10
Results tracked3016

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Category by category

Coding Claude Sonnet 5.5 leads

Claude 3 Sonnet: 29.2 (#296), Claude Sonnet 5.5: 65.5 (#6)

BenchmarkClaude 3 SonnetClaude Sonnet 5.5
FrontierCode—52.1%
CursorBench—55.5%
LMArena WebDev—1699
FrontierSWE—61.9%
SciCode—61%
WeirdML10.2%—
BigCodeBench Instruct42.7%—
LMArena Coding1223—
BigCodeBench Complete53.8%—
ALE-Bench—1,819
HumanEval+64%—
MBPP+69.3%—

Agentic & Tool Use Not comparable

Claude 3 Sonnet: —, Claude Sonnet 5.5: 44.9 (#14)

BenchmarkClaude 3 SonnetClaude Sonnet 5.5
APEX-Agents—75.5%

Reasoning Claude Sonnet 5.5 leads

Claude 3 Sonnet: 19.7 (#232), Claude Sonnet 5.5: 52.4 (#29)

BenchmarkClaude 3 SonnetClaude Sonnet 5.5
CritPt—31.4%
LMArena Hard Prompts1197—
Mystery Game Puzzles—65%
DTBench53.6%—
Epoch Capabilities Index120.69—
WinoGrande75.1%—

Math Claude Sonnet 5.5 leads

Claude 3 Sonnet: 10.0 (#305), Claude Sonnet 5.5: 88.7 (#4)

BenchmarkClaude 3 SonnetClaude Sonnet 5.5
OTIS Mock AIME 2024-20252.5%100%
FrontierMath (Tiers 1-3)—88.8%
FrontierMath Tier 4—80.5%
ProofBench—100%
LMArena Math1213—
MATH Level 518.2%—

Knowledge Claude Sonnet 5.5 leads

Claude 3 Sonnet: 21.1 (#271), Claude Sonnet 5.5: 66.0 (#11)

BenchmarkClaude 3 SonnetClaude Sonnet 5.5
GPQA Diamond40.6%95.6%
SimpleQA Verified—46.5%
LMArena Expert1173—
MMLU75.9%—

Multimodal Claude Sonnet 5.5 leads

Claude 3 Sonnet: 24.7 (#120), Claude Sonnet 5.5: 53.2 (#5)

BenchmarkClaude 3 SonnetClaude Sonnet 5.5
LMArena Vision984—
Furniture Assembly—75%

Multilingual Not comparable

Claude 3 Sonnet: 38.0 (#229), Claude Sonnet 5.5: —

BenchmarkClaude 3 SonnetClaude Sonnet 5.5
LMArena Non-English1205—
LMArena Chinese1188—
LMArena French1228—
LMArena German1204—
LMArena Japanese1131—
LMArena Korean1128—
LMArena Russian1227—
LMArena Spanish1204—

Instruction Following Not comparable

Claude 3 Sonnet: 63.1 (#230), Claude Sonnet 5.5: —

BenchmarkClaude 3 SonnetClaude Sonnet 5.5
LMArena Instruction Following1200—

Long Context Not comparable

Claude 3 Sonnet: 36.7 (#223), Claude Sonnet 5.5: —

BenchmarkClaude 3 SonnetClaude Sonnet 5.5
LMArena Longer Query1211—

Writing & Preference Not comparable

Claude 3 Sonnet: 42.3 (#233), Claude Sonnet 5.5: —

BenchmarkClaude 3 SonnetClaude Sonnet 5.5
LMArena Text1218—
LMArena Creative Writing1186—
LMArena Multi-Turn1227—

Frequently asked questions

Is Claude 3 Sonnet better than Claude Sonnet 5.5?

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 28.8 on the Noometry Index.

Is Claude 3 Sonnet or Claude Sonnet 5.5 better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 29.2 in the Noometry coding category.

How many benchmarks do Claude 3 Sonnet and Claude Sonnet 5.5 share?

2 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Claude Sonnet 5.5 has 16.

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