Noometry

Model comparison

GPT-5.4 mini vs Grok 4.20 Multi-Agent

Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 45.0 on the Noometry Index.

Last verified . 19 shared benchmarks.

GPT-5.4 mini OpenAI

45.0

Rank #76 Confirmed

Grok 4.20 Multi-Agent xAI

46.2

Rank #65 Confirmed

Summary

  • They share 19 benchmarks with published results for both. GPT-5.4 mini scores higher in 4 categories and Grok 4.20 Multi-Agent in 5 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 43.9 to 30.4.
  • The biggest single-benchmark swing is NYT Connections (extended): 61.8% for GPT-5.4 mini and 89.6% for Grok 4.20 Multi-Agent.
  • Grok 4.20 Multi-Agent is cheaper at $1.25 / $2.50 per million input/output tokens, against $0.75 / $4.50 for GPT-5.4 mini.
  • Grok 4.20 Multi-Agent accepts more context: 1M tokens versus 400K.

Side by side

GPT-5.4 miniGrok 4.20 Multi-Agent
ProviderOpenAIxAI
Noometry Index45.046.2
Released2026-03-172026-03-09
WeightsProprietaryProprietary
Context window400K1M
Max output128K30K
Input $ / M tokens$0.75$1.25
Output $ / M tokens$4.50$2.50
Results tracked4620

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Category by category

Coding GPT-5.4 mini leads

GPT-5.4 mini: 45.2 (#72), Grok 4.20 Multi-Agent: 43.0 (#92)

BenchmarkGPT-5.4 miniGrok 4.20 Multi-Agent
LMArena Coding14381457
FrontierCode27%—
LMArena WebDev1397—
SciCode49.9%—
WeirdML60.3%—
ALE-Bench1,189—

Agentic & Tool Use Not comparable

GPT-5.4 mini: 29.9 (#81), Grok 4.20 Multi-Agent: —

BenchmarkGPT-5.4 miniGrok 4.20 Multi-Agent
DeepResearch Bench36.3%—
LMArena Search—1204

Reasoning Grok 4.20 Multi-Agent leads

GPT-5.4 mini: 30.4 (#85), Grok 4.20 Multi-Agent: 43.9 (#48)

BenchmarkGPT-5.4 miniGrok 4.20 Multi-Agent
NYT Connections (extended)61.8%89.6%
LMArena Hard Prompts14241448
ARC-AGI-218.9%—
Kagi LLM Benchmark37.9%—
ARC-AGI-163.7%—
CritPt10%—
Chess Puzzles24%—
Thematic Generalization61.7%—
Mystery Game Puzzles11%—
DTBench80%—
LMCA40.8%—
Epoch Capabilities Index148.84—
ForecastBench57—

Math GPT-5.4 mini leads

GPT-5.4 mini: 45.5 (#75), Grok 4.20 Multi-Agent: 39.4 (#104)

BenchmarkGPT-5.4 miniGrok 4.20 Multi-Agent
LMArena Math14191442
FrontierMath (Tiers 1-3)51.2%—
FrontierMath Tier 49.8%—
OTIS Mock AIME 2024-202588.9%—
ProofBench21%—
FrontierMath (Feb 2025 set)28.3%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge GPT-5.4 mini leads

GPT-5.4 mini: 51.5 (#67), Grok 4.20 Multi-Agent: 40.4 (#119)

BenchmarkGPT-5.4 miniGrok 4.20 Multi-Agent
LMArena Expert14351445
GPQA Diamond86.9%—
SimpleQA Verified29.4%—
Vectara Hallucination Rate5.5%—

Multimodal Too close to call

GPT-5.4 mini: 39.7 (#56), Grok 4.20 Multi-Agent: 40.5 (#48)

BenchmarkGPT-5.4 miniGrok 4.20 Multi-Agent
LMArena Vision12451259

Multilingual Grok 4.20 Multi-Agent leads

GPT-5.4 mini: 51.9 (#96), Grok 4.20 Multi-Agent: 54.4 (#43)

BenchmarkGPT-5.4 miniGrok 4.20 Multi-Agent
LMArena Non-English14051440
LMArena Chinese14461475
LMArena French14401466
LMArena German14091456
LMArena Japanese13741405
LMArena Korean13681416
LMArena Russian14171457
LMArena Spanish14051447

Instruction Following Too close to call

GPT-5.4 mini: 74.1 (#102), Grok 4.20 Multi-Agent: 74.8 (#84)

BenchmarkGPT-5.4 miniGrok 4.20 Multi-Agent
LMArena Instruction Following14051420

Long Context Too close to call

GPT-5.4 mini: 43.0 (#112), Grok 4.20 Multi-Agent: 43.7 (#88)

BenchmarkGPT-5.4 miniGrok 4.20 Multi-Agent
LMArena Longer Query14071431

Writing & Preference Too close to call

GPT-5.4 mini: 64.0 (#58), Grok 4.20 Multi-Agent: 64.0 (#59)

BenchmarkGPT-5.4 miniGrok 4.20 Multi-Agent
LMArena Text14121450
LMArena Creative Writing13701436
LMArena Multi-Turn14291452
EQ-Bench Creative Writing1665—

Frequently asked questions

Is GPT-5.4 mini better than Grok 4.20 Multi-Agent?

Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 45.0 on the Noometry Index.

Which is cheaper, GPT-5.4 mini or Grok 4.20 Multi-Agent?

Grok 4.20 Multi-Agent is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; GPT-5.4 mini lists at $0.75 and $4.50.

Is GPT-5.4 mini or Grok 4.20 Multi-Agent better for coding?

GPT-5.4 mini scores higher on coding benchmarks: 45.2 versus 43.0 in the Noometry coding category.

Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 400K.

How many benchmarks do GPT-5.4 mini and Grok 4.20 Multi-Agent share?

19 benchmarks have published results for both models. GPT-5.4 mini has 46 scored results on Noometry and Grok 4.20 Multi-Agent has 20.

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