Noometry

Model comparison

Claude Fable 5 vs GPT-4o mini

Claude Fable 5 is the stronger model overall, scoring 66.8 to 25.5 on the Noometry Index. GPT-4o mini costs 76× less per token, which makes it the better buy when Claude Fable 5's lead doesn't matter for your workload.

Last verified . 32 shared benchmarks.

Claude Fable 5 Anthropic

66.8

Rank #5 Confirmed

GPT-4o mini OpenAI

25.5

Rank #343 Confirmed

Summary

  • They share 32 benchmarks with published results for both. Claude Fable 5 scores higher in 10 categories and GPT-4o mini in 0 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Fable 5 leads 88.5 to 10.4.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Fable 5 and 6.9% for GPT-4o mini.
  • GPT-4o mini is cheaper at $0.15 / $0.60 per million input/output tokens, against $10 / $50 for Claude Fable 5.
  • Claude Fable 5 accepts more context: 1M tokens versus 128K.

Side by side

Claude Fable 5GPT-4o mini
ProviderAnthropicOpenAI
Noometry Index66.825.5
Released2026-06-072024-07-18
WeightsProprietaryProprietary
Context window1M128K
Max output128K16K
Input $ / M tokens$10$0.15
Output $ / M tokens$50$0.60
Results tracked6260

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Category by category

Coding Claude Fable 5 leads

Claude Fable 5: 70.6 (#4), GPT-4o mini: 22.0 (#335)

BenchmarkClaude Fable 5GPT-4o mini
WeirdML91.9%11.8%
LMArena Coding15191290
DeepSWE69.9%—
FrontierCode53.5%—
Aider Polyglot—3.6%
LMArena WebDev1625—
FrontierSWE47%—
SciCode61%—
GSO78.4%—
BigCodeBench Instruct—46.1%
LiveBench Coding—43.1%
MirrorCode63.9%—
BigCodeBench Complete—57.4%
ALE-Bench2,041—
HumanEval+—83.5%
MBPP+—72.2%

Agentic & Tool Use Claude Fable 5 leads

Claude Fable 5: 54.0 (#2), GPT-4o mini: 27.5 (#101)

BenchmarkClaude Fable 5GPT-4o mini
APEX-Agents63.6%—
Remote Labor Index16.1%—
τ²-bench Banking39.7%—
PostTrainBench41.8%—
BALROG—17.4%
GBAEval74.5%—
GDP.pdf30%—
LMArena Search1230—
Vending-Bench 25,680—

Reasoning Claude Fable 5 leads

Claude Fable 5: 76.8 (#6), GPT-4o mini: 8.7 (#347)

BenchmarkClaude Fable 5GPT-4o mini
ARC-AGI-289.2%0%
SimpleBench81.9%10.7%
Kagi LLM Benchmark91.4%28.8%
Chess Puzzles41%0%
LMArena Hard Prompts15081267
Mystery Game Puzzles52%12%
DTBench98.4%54.4%
LMCA61.1%10.4%
Epoch Capabilities Index162.06126.56
NYT Connections (extended)92.7%—
ARC-AGI-198.5%—
CritPt28.6%—
EnigmaEval39.3%—
EBR-Bench39.5%—
LiveBench Reasoning—32.8%
LiveBench Data Analysis—50%
Surface Evolver Bench95%—
Bench to the Future 30.13—
LiveBench—41.3%
PIQA—88.7%

Math Claude Fable 5 leads

Claude Fable 5: 88.5 (#5), GPT-4o mini: 10.4 (#314)

BenchmarkClaude Fable 5GPT-4o mini
FrontierMath (Tiers 1-3)87%0.7%
OTIS Mock AIME 2024-2025100%6.9%
LMArena Math15191267
FrontierMath Tier 490.2%—
ProofBench95%—
Omni-MATH—28%
LiveBench Math—36.3%
MATH Level 5—52.6%
FrontierMath Erdős0%—
GSM8K—91.3%

Knowledge Claude Fable 5 leads

Claude Fable 5: 62.2 (#25), GPT-4o mini: 17.7 (#284)

BenchmarkClaude Fable 5GPT-4o mini
GPQA Diamond85.9%37.7%
SimpleQA Verified70.7%8.3%
LMArena Expert15341235
MMLU-Pro—60.3%
Confabulations—37.2%
GPQA (HELM)—36.8%
BoolQ—88.7%
MMLU—81.8%

Multimodal Claude Fable 5 leads

Claude Fable 5: 45.3 (#17), GPT-4o mini: 25.9 (#122)

BenchmarkClaude Fable 5GPT-4o mini
LMArena Vision13241066
Video-MME—64.8%
GeoBench—64%
VPCT—34%
Blueprint-Bench 238.6%—
Furniture Assembly35.8%—
LMArena Document1496—

Multilingual Claude Fable 5 leads

Claude Fable 5: 57.3 (#9), GPT-4o mini: 42.0 (#199)

BenchmarkClaude Fable 5GPT-4o mini
LMArena Non-English14811266
LMArena Chinese15431265
LMArena French15051297
LMArena German14861272
LMArena Japanese15061216
LMArena Korean14881195
LMArena Russian15041275
LMArena Spanish14981276

Instruction Following Claude Fable 5 leads

Claude Fable 5: 78.6 (#8), GPT-4o mini: 61.9 (#239)

BenchmarkClaude Fable 5GPT-4o mini
LMArena Instruction Following15021258
LiveBench Instruction Following—56.8%
IFEval—78.2%

Long Context Claude Fable 5 leads

Claude Fable 5: 46.3 (#23), GPT-4o mini: 39.1 (#186)

BenchmarkClaude Fable 5GPT-4o mini
LMArena Longer Query15091289

Writing & Preference Claude Fable 5 leads

Claude Fable 5: 75.9 (#5), GPT-4o mini: 39.5 (#248)

BenchmarkClaude Fable 5GPT-4o mini
LMArena Text14911286
LMArena Creative Writing14941268
EQ-Bench Creative Writing1943873
LMArena Multi-Turn15041285
Short-Story Creative Writing—67.2%
WildBench—79.1%
EQ-Bench 41340—
LiveBench Language—28.6%

Frequently asked questions

Is Claude Fable 5 better than GPT-4o mini?

Claude Fable 5 is the stronger model overall, scoring 66.8 to 25.5 on the Noometry Index. GPT-4o mini costs 76× less per token, which makes it the better buy when Claude Fable 5's lead doesn't matter for your workload.

Which is cheaper, Claude Fable 5 or GPT-4o mini?

GPT-4o mini is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Claude Fable 5 lists at $10 and $50.

Is Claude Fable 5 or GPT-4o mini better for coding?

Claude Fable 5 scores higher on coding benchmarks: 70.6 versus 22.0 in the Noometry coding category.

Which has the bigger context window?

Claude Fable 5 does, with 1M tokens against 128K.

How many benchmarks do Claude Fable 5 and GPT-4o mini share?

32 benchmarks have published results for both models. Claude Fable 5 has 62 scored results on Noometry and GPT-4o mini has 60.

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