Noometry

Model comparison

Claude 3.5 Haiku vs Step 3.7 Flash

Step 3.7 Flash is the stronger model overall, scoring 37.3 to 29.2 on the Noometry Index.

Last verified . 2 shared benchmarks.

Claude 3.5 Haiku Anthropic

29.2

Rank #315 Confirmed

Step 3.7 Flash StepFun

37.3

Rank #207 Reported

Summary

  • They share 2 benchmarks with published results for both. Claude 3.5 Haiku scores higher in 0 categories and Step 3.7 Flash in 3 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where Step 3.7 Flash leads 42.9 to 14.7.
  • The biggest single-benchmark swing is SciCode: 27.4% for Claude 3.5 Haiku and 40% for Step 3.7 Flash.
  • Step 3.7 Flash has downloadable open weights; the other is API-only.

Side by side

Claude 3.5 HaikuStep 3.7 Flash
ProviderAnthropicStepFun
Noometry Index29.237.3
Released2024-10-222026-05-29
WeightsProprietaryOpen
Context window—256K
Max output—256K
Input $ / M tokens—$0.18
Output $ / M tokens—$1.11
Results tracked495

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Category by category

Coding Step 3.7 Flash leads

Claude 3.5 Haiku: 32.9 (#265), Step 3.7 Flash: 40.0 (#150)

BenchmarkClaude 3.5 HaikuStep 3.7 Flash
SciCode27.4%40%
Aider Polyglot28%—
WeirdML30.7%—
BigCodeBench Instruct46.1%—
LiveBench Coding51.4%—
LMArena Coding1286—
BigCodeBench Complete59%—
CadEval32%—
ALE-Bench—694.12

Agentic & Tool Use Not comparable

Claude 3.5 Haiku: 28.0 (#95), Step 3.7 Flash: —

BenchmarkClaude 3.5 HaikuStep 3.7 Flash
BALROG19.3%—

Reasoning Step 3.7 Flash leads

Claude 3.5 Haiku: 17.7 (#290), Step 3.7 Flash: 21.6 (#219)

BenchmarkClaude 3.5 HaikuStep 3.7 Flash
CritPt0%2.3%
NYT Connections (extended)—39.7%
LiveBench Reasoning28.1%—
LMArena Hard Prompts1251—
DTBench56.7%—
LiveBench Data Analysis48.5%—
Epoch Capabilities Index127.15—
LiveBench43.5%—

Math Step 3.7 Flash leads

Claude 3.5 Haiku: 14.7 (#300), Step 3.7 Flash: 42.9 (#82)

BenchmarkClaude 3.5 HaikuStep 3.7 Flash
MathArena Final-Answer Competitions—68.5%
OTIS Mock AIME 2024-20254.3%—
Omni-MATH22.4%—
LiveBench Math35.5%—
LMArena Math1244—
MATH Level 546.4%—
FrontierMath (Feb 2025 set)0.3%—

Knowledge Not comparable

Claude 3.5 Haiku: 18.7 (#281), Step 3.7 Flash: —

BenchmarkClaude 3.5 HaikuStep 3.7 Flash
GPQA Diamond38.1%—
MMLU-Pro60.5%—
Confabulations36.7%—
GPQA (HELM)36.3%—
LMArena Expert1208—
MMLU74.3%—

Multimodal Not comparable

Claude 3.5 Haiku: 26.8 (#117), Step 3.7 Flash: —

BenchmarkClaude 3.5 HaikuStep 3.7 Flash
LMArena Vision1092—
GeoBench34%—

Multilingual Not comparable

Claude 3.5 Haiku: 40.0 (#218), Step 3.7 Flash: —

BenchmarkClaude 3.5 HaikuStep 3.7 Flash
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), Step 3.7 Flash: —

BenchmarkClaude 3.5 HaikuStep 3.7 Flash
LiveBench Instruction Following61.9%—
IFEval79.2%—
LMArena Instruction Following1241—

Long Context Not comparable

Claude 3.5 Haiku: 38.3 (#200), Step 3.7 Flash: —

BenchmarkClaude 3.5 HaikuStep 3.7 Flash
LMArena Longer Query1261—

Writing & Preference Not comparable

Claude 3.5 Haiku: 42.7 (#234), Step 3.7 Flash: —

BenchmarkClaude 3.5 HaikuStep 3.7 Flash
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 Step 3.7 Flash?

Step 3.7 Flash is the stronger model overall, scoring 37.3 to 29.2 on the Noometry Index.

Is Claude 3.5 Haiku or Step 3.7 Flash better for coding?

Step 3.7 Flash scores higher on coding benchmarks: 40.0 versus 32.9 in the Noometry coding category.

How many benchmarks do Claude 3.5 Haiku and Step 3.7 Flash share?

2 benchmarks have published results for both models. Claude 3.5 Haiku has 49 scored results on Noometry and Step 3.7 Flash has 5.

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