Noometry

Model comparison

Claude 3.5 Haiku vs Step 3.5 Flash

Step 3.5 Flash is the stronger model overall, scoring 42.3 to 29.2 on the Noometry Index.

Last verified . 17 shared benchmarks.

Claude 3.5 Haiku Anthropic

29.2

Rank #315 Confirmed

Step 3.5 Flash StepFun

42.3

Rank #116 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Claude 3.5 Haiku scores higher in 0 categories and Step 3.5 Flash in 8 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where Step 3.5 Flash leads 42.6 to 14.7.
  • Step 3.5 Flash has downloadable open weights; the other is API-only.

Side by side

Claude 3.5 HaikuStep 3.5 Flash
ProviderAnthropicStepFun
Noometry Index29.242.3
Released2024-10-222026-01-29
WeightsProprietaryOpen
Context window—256K
Max output—256K
Input $ / M tokens—$0.10
Output $ / M tokens—$0.30
Results tracked4919

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Step 3.5 Flash leads

Claude 3.5 Haiku: 32.9 (#265), Step 3.5 Flash: 42.4 (#105)

BenchmarkClaude 3.5 HaikuStep 3.5 Flash
LMArena Coding12861436
Aider Polyglot28%—
SciCode27.4%—
WeirdML30.7%—
BigCodeBench Instruct46.1%—
LiveBench Coding51.4%—
BigCodeBench Complete59%—
CadEval32%—

Agentic & Tool Use Not comparable

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

BenchmarkClaude 3.5 HaikuStep 3.5 Flash
BALROG19.3%—

Reasoning Step 3.5 Flash leads

Claude 3.5 Haiku: 17.7 (#290), Step 3.5 Flash: 22.2 (#202)

BenchmarkClaude 3.5 HaikuStep 3.5 Flash
LMArena Hard Prompts12511411
NYT Connections (extended)—28.4%
CritPt0%—
LiveBench Reasoning28.1%—
DTBench56.7%—
LiveBench Data Analysis48.5%—
Epoch Capabilities Index127.15—
LiveBench43.5%—

Math Step 3.5 Flash leads

Claude 3.5 Haiku: 14.7 (#300), Step 3.5 Flash: 42.6 (#84)

BenchmarkClaude 3.5 HaikuStep 3.5 Flash
LMArena Math12441408
MathArena Final-Answer Competitions—66.8%
OTIS Mock AIME 2024-20254.3%—
Omni-MATH22.4%—
LiveBench Math35.5%—
MATH Level 546.4%—
FrontierMath (Feb 2025 set)0.3%—

Knowledge Step 3.5 Flash leads

Claude 3.5 Haiku: 18.7 (#281), Step 3.5 Flash: 39.6 (#132)

BenchmarkClaude 3.5 HaikuStep 3.5 Flash
LMArena Expert12081421
GPQA Diamond38.1%—
MMLU-Pro60.5%—
Confabulations36.7%—
GPQA (HELM)36.3%—
MMLU74.3%—

Multimodal Not comparable

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

BenchmarkClaude 3.5 HaikuStep 3.5 Flash
LMArena Vision1092—
GeoBench34%—

Multilingual Step 3.5 Flash leads

Claude 3.5 Haiku: 40.0 (#218), Step 3.5 Flash: 50.5 (#119)

BenchmarkClaude 3.5 HaikuStep 3.5 Flash
LMArena Non-English12381385
LMArena Chinese12291447
LMArena French12641421
LMArena German12371405
LMArena Japanese11751354
LMArena Korean11731352
LMArena Russian12531385
LMArena Spanish12611419

Instruction Following Step 3.5 Flash leads

Claude 3.5 Haiku: 62.9 (#234), Step 3.5 Flash: 73.1 (#124)

BenchmarkClaude 3.5 HaikuStep 3.5 Flash
LMArena Instruction Following12411385
LiveBench Instruction Following61.9%—
IFEval79.2%—

Long Context Step 3.5 Flash leads

Claude 3.5 Haiku: 38.3 (#200), Step 3.5 Flash: 42.8 (#117)

BenchmarkClaude 3.5 HaikuStep 3.5 Flash
LMArena Longer Query12611402

Writing & Preference Step 3.5 Flash leads

Claude 3.5 Haiku: 42.7 (#234), Step 3.5 Flash: 58.8 (#113)

BenchmarkClaude 3.5 HaikuStep 3.5 Flash
LMArena Text12551403
LMArena Creative Writing12331357
LMArena Multi-Turn12651405
Short-Story Creative Writing73.5%—
EQ-Bench Creative Writing1146—
WildBench76%—
LiveBench Language35.4%—

Frequently asked questions

Is Claude 3.5 Haiku better than Step 3.5 Flash?

Step 3.5 Flash is the stronger model overall, scoring 42.3 to 29.2 on the Noometry Index.

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

Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 32.9 in the Noometry coding category.

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

17 benchmarks have published results for both models. Claude 3.5 Haiku has 49 scored results on Noometry and Step 3.5 Flash has 19.

Related comparisons

Go deeper