Noometry

Model comparison

Claude 3.5 Haiku vs GPT-5.5 Pro

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 29.2 on the Noometry Index.

Last verified . 6 shared benchmarks.

Claude 3.5 Haiku Anthropic

29.2

Rank #315 Confirmed

GPT-5.5 Pro OpenAI

64.3

Rank #8 Confirmed

Summary

  • They share 6 benchmarks with published results for both. Claude 3.5 Haiku scores higher in 0 categories and GPT-5.5 Pro in 3 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 14.7.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 4.3% for Claude 3.5 Haiku and 100% for GPT-5.5 Pro.

Side by side

Claude 3.5 HaikuGPT-5.5 Pro
ProviderAnthropicOpenAI
Noometry Index29.264.3
Released2024-10-222026-04-23
WeightsProprietaryProprietary
Context window—1.05M
Max output—128K
Input $ / M tokens—$30
Output $ / M tokens—$180
Results tracked4914

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Category by category

Coding Not comparable

Claude 3.5 Haiku: 32.9 (#265), GPT-5.5 Pro: —

BenchmarkClaude 3.5 HaikuGPT-5.5 Pro
Aider Polyglot28%—
SciCode27.4%—
WeirdML30.7%—
BigCodeBench Instruct46.1%—
LiveBench Coding51.4%—
LMArena Coding1286—
BigCodeBench Complete59%—
CadEval32%—

Agentic & Tool Use Not comparable

Claude 3.5 Haiku: 28.0 (#95), GPT-5.5 Pro: —

BenchmarkClaude 3.5 HaikuGPT-5.5 Pro
BALROG19.3%—

Reasoning GPT-5.5 Pro leads

Claude 3.5 Haiku: 17.7 (#290), GPT-5.5 Pro: 73.3 (#10)

BenchmarkClaude 3.5 HaikuGPT-5.5 Pro
CritPt0%30.6%
DTBench56.7%96%
Epoch Capabilities Index127.15162.07
ARC-AGI-2—84.6%
SimpleBench—76.9%
ARC-AGI-1—96.5%
Chess Puzzles—64%
LiveBench Reasoning28.1%—
LMArena Hard Prompts1251—
LiveBench Data Analysis48.5%—
LMCA—53.9%
LiveBench43.5%—

Math GPT-5.5 Pro leads

Claude 3.5 Haiku: 14.7 (#300), GPT-5.5 Pro: 84.0 (#10)

BenchmarkClaude 3.5 HaikuGPT-5.5 Pro
OTIS Mock AIME 2024-20254.3%100%
FrontierMath (Feb 2025 set)0.3%52.4%
FrontierMath (Tiers 1-3)—87.7%
FrontierMath Tier 4—78%
Omni-MATH22.4%—
LiveBench Math35.5%—
LMArena Math1244—
MATH Level 546.4%—
FrontierMath Tier 4 (v1)—39.6%

Knowledge GPT-5.5 Pro leads

Claude 3.5 Haiku: 18.7 (#281), GPT-5.5 Pro: 64.1 (#19)

BenchmarkClaude 3.5 HaikuGPT-5.5 Pro
GPQA Diamond38.1%93.9%
MMLU-Pro60.5%—
Confabulations36.7%—
GPQA (HELM)36.3%—
LMArena Expert1208—
MMLU74.3%—

Multimodal Not comparable

Claude 3.5 Haiku: 26.8 (#117), GPT-5.5 Pro: —

BenchmarkClaude 3.5 HaikuGPT-5.5 Pro
LMArena Vision1092—
GeoBench34%—

Multilingual Not comparable

Claude 3.5 Haiku: 40.0 (#218), GPT-5.5 Pro: —

BenchmarkClaude 3.5 HaikuGPT-5.5 Pro
LMArena Non-English1238—
LMArena Chinese1229—
LMArena French1264—
LMArena German1237—
LMArena Japanese1175—
LMArena Korean1173—
LMArena Russian1253—
LMArena Spanish1261—

Instruction Following Not comparable

Claude 3.5 Haiku: 62.9 (#234), GPT-5.5 Pro: —

BenchmarkClaude 3.5 HaikuGPT-5.5 Pro
LiveBench Instruction Following61.9%—
IFEval79.2%—
LMArena Instruction Following1241—

Long Context Not comparable

Claude 3.5 Haiku: 38.3 (#200), GPT-5.5 Pro: —

BenchmarkClaude 3.5 HaikuGPT-5.5 Pro
LMArena Longer Query1261—

Writing & Preference Not comparable

Claude 3.5 Haiku: 42.7 (#234), GPT-5.5 Pro: —

BenchmarkClaude 3.5 HaikuGPT-5.5 Pro
LMArena Text1255—
LMArena Creative Writing1233—
Short-Story Creative Writing73.5%—
EQ-Bench Creative Writing1146—
WildBench76%—
LMArena Multi-Turn1265—
LiveBench Language35.4%—

Frequently asked questions

Is Claude 3.5 Haiku better than GPT-5.5 Pro?

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 29.2 on the Noometry Index.

How many benchmarks do Claude 3.5 Haiku and GPT-5.5 Pro share?

6 benchmarks have published results for both models. Claude 3.5 Haiku has 49 scored results on Noometry and GPT-5.5 Pro has 14.

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