Noometry

Model comparison

GPT-4o mini vs Grok 4.20 (Non-Reasoning)

Grok 4.20 (Non-Reasoning) is the stronger model overall, scoring 48.6 to 25.5 on the Noometry Index. GPT-4o mini costs 6.0× less per token, which makes it the better buy when Grok 4.20 (Non-Reasoning)'s lead doesn't matter for your workload.

Last verified . 30 shared benchmarks.

GPT-4o mini OpenAI

25.5

Rank #343 Confirmed

Grok 4.20 (Non-Reasoning) xAI

48.6

Rank #54 Confirmed

Summary

  • They share 30 benchmarks with published results for both. GPT-4o mini scores higher in 0 categories and Grok 4.20 (Non-Reasoning) in 10 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.20 (Non-Reasoning) leads 52.3 to 8.7.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 6.9% for GPT-4o mini and 92.2% for Grok 4.20 (Non-Reasoning).
  • GPT-4o mini is cheaper at $0.15 / $0.60 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 (Non-Reasoning).
  • Grok 4.20 (Non-Reasoning) accepts more context: 1M tokens versus 128K.

Side by side

GPT-4o miniGrok 4.20 (Non-Reasoning)
ProviderOpenAIxAI
Noometry Index25.548.6
Released2024-07-182026-02-17
WeightsProprietaryProprietary
Context window128K1M
Max output16K30K
Input $ / M tokens$0.15$1.25
Output $ / M tokens$0.60$2.50
Results tracked6046

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Category by category

Coding Grok 4.20 (Non-Reasoning) leads

GPT-4o mini: 22.0 (#335), Grok 4.20 (Non-Reasoning): 42.1 (#112)

BenchmarkGPT-4o miniGrok 4.20 (Non-Reasoning)
WeirdML11.8%52.3%
LMArena Coding12901459
Aider Polyglot3.6%—
LMArena WebDev—1375
BigCodeBench Instruct46.1%—
LiveBench Coding43.1%—
BigCodeBench Complete57.4%—
ALE-Bench—1,150
HumanEval+83.5%—
MBPP+72.2%—

Agentic & Tool Use Grok 4.20 (Non-Reasoning) leads

GPT-4o mini: 27.5 (#101), Grok 4.20 (Non-Reasoning): 34.4 (#46)

BenchmarkGPT-4o miniGrok 4.20 (Non-Reasoning)
Terminal-Bench—57.3%
τ²-bench Banking—18%
BALROG17.4%—
LMArena Search—1189
Vending-Bench 2—4,663

Reasoning Grok 4.20 (Non-Reasoning) leads

GPT-4o mini: 8.7 (#347), Grok 4.20 (Non-Reasoning): 52.3 (#32)

BenchmarkGPT-4o miniGrok 4.20 (Non-Reasoning)
ARC-AGI-20%65.1%
Kagi LLM Benchmark28.8%75%
Chess Puzzles0%24%
LMArena Hard Prompts12671451
DTBench54.4%90.1%
LMCA10.4%38.7%
Epoch Capabilities Index126.56151.98
SimpleBench10.7%—
NYT Connections (extended)—85.4%
ARC-AGI-1—89.5%
Thematic Generalization—63.8%
LiveBench Reasoning32.8%—
Mystery Game Puzzles12%—
LiveBench Data Analysis50%—
ForecastBench—61.4
LiveBench41.3%—
PIQA88.7%—

Math Grok 4.20 (Non-Reasoning) leads

GPT-4o mini: 10.4 (#314), Grok 4.20 (Non-Reasoning): 48.2 (#65)

BenchmarkGPT-4o miniGrok 4.20 (Non-Reasoning)
FrontierMath (Tiers 1-3)0.7%44.9%
OTIS Mock AIME 2024-20256.9%92.2%
LMArena Math12671455
FrontierMath Tier 4—17.1%
ProofBench—14%
Omni-MATH28%—
LiveBench Math36.3%—
MATH Level 552.6%—
GSM8K91.3%—

Knowledge Grok 4.20 (Non-Reasoning) leads

GPT-4o mini: 17.7 (#284), Grok 4.20 (Non-Reasoning): 52.8 (#60)

BenchmarkGPT-4o miniGrok 4.20 (Non-Reasoning)
GPQA Diamond37.7%89.3%
SimpleQA Verified8.3%30.2%
LMArena Expert12351439
MMLU-Pro60.3%—
Confabulations37.2%—
GPQA (HELM)36.8%—
BoolQ88.7%—
MMLU81.8%—

Multimodal Grok 4.20 (Non-Reasoning) leads

GPT-4o mini: 25.9 (#122), Grok 4.20 (Non-Reasoning): 33.3 (#98)

BenchmarkGPT-4o miniGrok 4.20 (Non-Reasoning)
LMArena Vision10661263
Video-MME64.8%—
GeoBench64%—
VPCT34%—
Blueprint-Bench 2—0%
LMArena Document—1416

Multilingual Grok 4.20 (Non-Reasoning) leads

GPT-4o mini: 42.0 (#199), Grok 4.20 (Non-Reasoning): 54.5 (#40)

BenchmarkGPT-4o miniGrok 4.20 (Non-Reasoning)
LMArena Non-English12661441
LMArena Chinese12651481
LMArena French12971476
LMArena German12721465
LMArena Japanese12161449
LMArena Korean11951417
LMArena Russian12751458
LMArena Spanish12761443

Instruction Following Grok 4.20 (Non-Reasoning) leads

GPT-4o mini: 61.9 (#239), Grok 4.20 (Non-Reasoning): 74.8 (#83)

BenchmarkGPT-4o miniGrok 4.20 (Non-Reasoning)
LMArena Instruction Following12581420
LiveBench Instruction Following56.8%—
IFEval78.2%—

Long Context Grok 4.20 (Non-Reasoning) leads

GPT-4o mini: 39.1 (#186), Grok 4.20 (Non-Reasoning): 45.5 (#34)

BenchmarkGPT-4o miniGrok 4.20 (Non-Reasoning)
LMArena Longer Query12891437
CL-bench—22.2%
CL-bench Life—11.9%

Writing & Preference Grok 4.20 (Non-Reasoning) leads

GPT-4o mini: 39.5 (#248), Grok 4.20 (Non-Reasoning): 65.7 (#44)

BenchmarkGPT-4o miniGrok 4.20 (Non-Reasoning)
LMArena Text12861451
LMArena Creative Writing12681438
EQ-Bench Creative Writing8731574
LMArena Multi-Turn12851456
Short-Story Creative Writing67.2%—
WildBench79.1%—
LiveBench Language28.6%—

Frequently asked questions

Is GPT-4o mini better than Grok 4.20 (Non-Reasoning)?

Grok 4.20 (Non-Reasoning) is the stronger model overall, scoring 48.6 to 25.5 on the Noometry Index. GPT-4o mini costs 6.0× less per token, which makes it the better buy when Grok 4.20 (Non-Reasoning)'s lead doesn't matter for your workload.

Which is cheaper, GPT-4o mini or Grok 4.20 (Non-Reasoning)?

GPT-4o mini is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Grok 4.20 (Non-Reasoning) lists at $1.25 and $2.50.

Is GPT-4o mini or Grok 4.20 (Non-Reasoning) better for coding?

Grok 4.20 (Non-Reasoning) scores higher on coding benchmarks: 42.1 versus 22.0 in the Noometry coding category.

Which has the bigger context window?

Grok 4.20 (Non-Reasoning) does, with 1M tokens against 128K.

How many benchmarks do GPT-4o mini and Grok 4.20 (Non-Reasoning) share?

30 benchmarks have published results for both models. GPT-4o mini has 60 scored results on Noometry and Grok 4.20 (Non-Reasoning) has 46.

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