Noometry

Model comparison

GPT-5.4 mini vs Step 3.7 Flash

GPT-5.4 mini is the stronger model overall, scoring 45.0 to 37.3 on the Noometry Index. Step 3.7 Flash costs 4.1× less per token, which makes it the better buy when GPT-5.4 mini's lead doesn't matter for your workload.

Last verified . 4 shared benchmarks.

GPT-5.4 mini OpenAI

45.0

Rank #76 Confirmed

Step 3.7 Flash StepFun

37.3

Rank #207 Reported

Summary

  • They share 4 benchmarks with published results for both. GPT-5.4 mini scores higher in 3 categories and Step 3.7 Flash in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GPT-5.4 mini leads 30.4 to 21.6.
  • The biggest single-benchmark swing is NYT Connections (extended): 61.8% for GPT-5.4 mini and 39.7% for Step 3.7 Flash.
  • Step 3.7 Flash is cheaper at $0.18 / $1.11 per million input/output tokens, against $0.75 / $4.50 for GPT-5.4 mini.
  • GPT-5.4 mini accepts more context: 400K tokens versus 256K.
  • Step 3.7 Flash has downloadable open weights; the other is API-only.

Side by side

GPT-5.4 miniStep 3.7 Flash
ProviderOpenAIStepFun
Noometry Index45.037.3
Released2026-03-172026-05-29
WeightsProprietaryOpen
Context window400K256K
Max output128K256K
Input $ / M tokens$0.75$0.18
Output $ / M tokens$4.50$1.11
Results tracked465

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Category by category

Coding GPT-5.4 mini leads

GPT-5.4 mini: 45.2 (#72), Step 3.7 Flash: 40.0 (#150)

BenchmarkGPT-5.4 miniStep 3.7 Flash
SciCode49.9%40%
ALE-Bench1,189694.12
FrontierCode27%—
LMArena WebDev1397—
WeirdML60.3%—
LMArena Coding1438—

Agentic & Tool Use Not comparable

GPT-5.4 mini: 29.9 (#81), Step 3.7 Flash: —

BenchmarkGPT-5.4 miniStep 3.7 Flash
DeepResearch Bench36.3%—

Reasoning GPT-5.4 mini leads

GPT-5.4 mini: 30.4 (#85), Step 3.7 Flash: 21.6 (#219)

BenchmarkGPT-5.4 miniStep 3.7 Flash
NYT Connections (extended)61.8%39.7%
CritPt10%2.3%
ARC-AGI-218.9%—
Kagi LLM Benchmark37.9%—
ARC-AGI-163.7%—
Chess Puzzles24%—
Thematic Generalization61.7%—
LMArena Hard Prompts1424—
Mystery Game Puzzles11%—
DTBench80%—
LMCA40.8%—
Epoch Capabilities Index148.84—
ForecastBench57—

Math GPT-5.4 mini leads

GPT-5.4 mini: 45.5 (#75), Step 3.7 Flash: 42.9 (#82)

BenchmarkGPT-5.4 miniStep 3.7 Flash
FrontierMath (Tiers 1-3)51.2%—
FrontierMath Tier 49.8%—
MathArena Final-Answer Competitions—68.5%
OTIS Mock AIME 2024-202588.9%—
ProofBench21%—
LMArena Math1419—
FrontierMath (Feb 2025 set)28.3%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge Not comparable

GPT-5.4 mini: 51.5 (#67), Step 3.7 Flash: —

BenchmarkGPT-5.4 miniStep 3.7 Flash
GPQA Diamond86.9%—
SimpleQA Verified29.4%—
Vectara Hallucination Rate5.5%—
LMArena Expert1435—

Multimodal Not comparable

GPT-5.4 mini: 39.7 (#56), Step 3.7 Flash: —

BenchmarkGPT-5.4 miniStep 3.7 Flash
LMArena Vision1245—

Multilingual Not comparable

GPT-5.4 mini: 51.9 (#96), Step 3.7 Flash: —

BenchmarkGPT-5.4 miniStep 3.7 Flash
LMArena Non-English1405—
LMArena Chinese1446—
LMArena French1440—
LMArena German1409—
LMArena Japanese1374—
LMArena Korean1368—
LMArena Russian1417—
LMArena Spanish1405—

Instruction Following Not comparable

GPT-5.4 mini: 74.1 (#102), Step 3.7 Flash: —

BenchmarkGPT-5.4 miniStep 3.7 Flash
LMArena Instruction Following1405—

Long Context Not comparable

GPT-5.4 mini: 43.0 (#112), Step 3.7 Flash: —

BenchmarkGPT-5.4 miniStep 3.7 Flash
LMArena Longer Query1407—

Writing & Preference Not comparable

GPT-5.4 mini: 64.0 (#58), Step 3.7 Flash: —

BenchmarkGPT-5.4 miniStep 3.7 Flash
LMArena Text1412—
LMArena Creative Writing1370—
EQ-Bench Creative Writing1665—
LMArena Multi-Turn1429—

Frequently asked questions

Is GPT-5.4 mini better than Step 3.7 Flash?

GPT-5.4 mini is the stronger model overall, scoring 45.0 to 37.3 on the Noometry Index. Step 3.7 Flash costs 4.1× less per token, which makes it the better buy when GPT-5.4 mini's lead doesn't matter for your workload.

Which is cheaper, GPT-5.4 mini or Step 3.7 Flash?

Step 3.7 Flash is cheaper. It lists at $0.18 per million input tokens and $1.11 per million output tokens; GPT-5.4 mini lists at $0.75 and $4.50.

Is GPT-5.4 mini or Step 3.7 Flash better for coding?

GPT-5.4 mini scores higher on coding benchmarks: 45.2 versus 40.0 in the Noometry coding category.

Which has the bigger context window?

GPT-5.4 mini does, with 400K tokens against 256K.

How many benchmarks do GPT-5.4 mini and Step 3.7 Flash share?

4 benchmarks have published results for both models. GPT-5.4 mini has 46 scored results on Noometry and Step 3.7 Flash has 5.

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