Noometry

Model comparison

Claude 2 vs Claude Fable 5

Claude Fable 5 is the stronger model overall, scoring 66.8 to 25.0 on the Noometry Index.

Last verified . 4 shared benchmarks.

Claude 2 Anthropic

25.0

Rank #346 Reported

Claude Fable 5 Anthropic

66.8

Rank #5 Confirmed

Summary

  • They share 4 benchmarks with published results for both. Claude 2 scores higher in 0 categories and Claude Fable 5 in 3 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Fable 5 leads 88.5 to 9.3.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 2 and 100% for Claude Fable 5.

Side by side

Claude 2Claude Fable 5
ProviderAnthropicAnthropic
Noometry Index25.066.8
Released2023-07-112026-06-07
WeightsProprietaryProprietary
Context window—1M
Max output—128K
Input $ / M tokens—$10
Output $ / M tokens—$50
Results tracked862

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Category by category

Coding Not comparable

Claude 2: —, Claude Fable 5: 70.6 (#4)

BenchmarkClaude 2Claude Fable 5
DeepSWE—69.9%
FrontierCode—53.5%
LMArena WebDev—1625
FrontierSWE—47%
SciCode—61%
GSO—78.4%
WeirdML—91.9%
LMArena Coding—1519
MirrorCode—63.9%
ALE-Bench—2,041
HumanEval+61.6%—

Agentic & Tool Use Not comparable

Claude 2: —, Claude Fable 5: 54.0 (#2)

BenchmarkClaude 2Claude Fable 5
APEX-Agents—63.6%
Remote Labor Index—16.1%
τ²-bench Banking—39.7%
PostTrainBench—41.8%
GBAEval—74.5%
GDP.pdf—30%
LMArena Search—1230
Vending-Bench 2—5,680

Reasoning Claude Fable 5 leads

Claude 2: 21.7 (#216), Claude Fable 5: 76.8 (#6)

BenchmarkClaude 2Claude Fable 5
DTBench51.9%98.4%
Epoch Capabilities Index120.13162.06
ARC-AGI-2—89.2%
SimpleBench—81.9%
Kagi LLM Benchmark—91.4%
NYT Connections (extended)—92.7%
ARC-AGI-1—98.5%
CritPt—28.6%
Chess Puzzles—41%
EnigmaEval—39.3%
EBR-Bench—39.5%
LMArena Hard Prompts—1508
Mystery Game Puzzles—52%
LMCA—61.1%
Surface Evolver Bench—95%
Bench to the Future 3—0.13

Math Claude Fable 5 leads

Claude 2: 9.3 (#320), Claude Fable 5: 88.5 (#5)

BenchmarkClaude 2Claude Fable 5
OTIS Mock AIME 2024-20252.5%100%
FrontierMath (Tiers 1-3)—87%
FrontierMath Tier 4—90.2%
ProofBench—95%
LMArena Math—1519
MATH Level 511.7%—
FrontierMath Erdős—0%

Knowledge Claude Fable 5 leads

Claude 2: 16.9 (#287), Claude Fable 5: 62.2 (#25)

BenchmarkClaude 2Claude Fable 5
GPQA Diamond34.7%85.9%
SimpleQA Verified—70.7%
LMArena Expert—1534
MMLU78.5%—
TriviaQA87.5%—

Multimodal Not comparable

Claude 2: —, Claude Fable 5: 45.3 (#17)

BenchmarkClaude 2Claude Fable 5
LMArena Vision—1324
Blueprint-Bench 2—38.6%
Furniture Assembly—35.8%
LMArena Document—1496

Multilingual Not comparable

Claude 2: —, Claude Fable 5: 57.3 (#9)

BenchmarkClaude 2Claude Fable 5
LMArena Non-English—1481
LMArena Chinese—1543
LMArena French—1505
LMArena German—1486
LMArena Japanese—1506
LMArena Korean—1488
LMArena Russian—1504
LMArena Spanish—1498

Instruction Following Not comparable

Claude 2: —, Claude Fable 5: 78.6 (#8)

BenchmarkClaude 2Claude Fable 5
LMArena Instruction Following—1502

Long Context Not comparable

Claude 2: —, Claude Fable 5: 46.3 (#23)

BenchmarkClaude 2Claude Fable 5
LMArena Longer Query—1509

Writing & Preference Not comparable

Claude 2: —, Claude Fable 5: 75.9 (#5)

BenchmarkClaude 2Claude Fable 5
LMArena Text—1491
LMArena Creative Writing—1494
EQ-Bench Creative Writing—1943
EQ-Bench 4—1340
LMArena Multi-Turn—1504

Frequently asked questions

Is Claude 2 better than Claude Fable 5?

Claude Fable 5 is the stronger model overall, scoring 66.8 to 25.0 on the Noometry Index.

How many benchmarks do Claude 2 and Claude Fable 5 share?

4 benchmarks have published results for both models. Claude 2 has 8 scored results on Noometry and Claude Fable 5 has 62.

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