Noometry

Model comparison

Claude Fable 5 vs Hermes 4 405B

Claude Fable 5 has enough public results to be ranked (#5); Hermes 4 405B does not yet, so treat this comparison as directional.

Last verified . 2 shared benchmarks.

Claude Fable 5 Anthropic

66.3

Rank #5 Confirmed

Hermes 4 405B Nous Research

37.1

Unranked Sparse

Summary

  • They share 2 benchmarks with published results for both. Claude Fable 5 scores higher in 2 categories and Hermes 4 405B in 0 categories; 2 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Fable 5 leads 76.8 to 25.3.
  • The biggest single-benchmark swing is Kagi LLM Benchmark: 91.4% for Claude Fable 5 and 55.8% for Hermes 4 405B.
  • Hermes 4 405B is cheaper at $1 / $3 per million input/output tokens, against $10 / $50 for Claude Fable 5.
  • Claude Fable 5 accepts more context: 1M tokens versus 131K.
  • Hermes 4 405B has downloadable open weights; the other is API-only.

Side by side

Claude Fable 5Hermes 4 405B
ProviderAnthropicNous Research
Noometry Index66.337.1
Released2026-06-07—
WeightsProprietaryOpen
Context window1M131K
Max output128K118K
Input $ / M tokens$10$1
Output $ / M tokens$50$3
Results tracked612

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Category by category

Coding Not comparable

Claude Fable 5: 67.0 (#4), Hermes 4 405B: —

BenchmarkClaude Fable 5Hermes 4 405B
DeepSWE69.9%—
FrontierCode53.5%—
LMArena WebDev1626—
FrontierSWE47%—
SciCode61%—
WeirdML91.9%—
LMArena Coding1519—
MirrorCode63.9%—
ALE-Bench2,041—

Agentic & Tool Use Not comparable

Claude Fable 5: 54.1 (#2), Hermes 4 405B: —

BenchmarkClaude Fable 5Hermes 4 405B
APEX-Agents63.6%—
Remote Labor Index16.1%—
τ²-bench Banking39.7%—
PostTrainBench41.8%—
GBAEval74.5%—
GDP.pdf30%—
LMArena Search1230—
Vending-Bench 25,680—

Reasoning Claude Fable 5 leads

Claude Fable 5: 76.8 (#4), Hermes 4 405B: 25.3

BenchmarkClaude Fable 5Hermes 4 405B
Kagi LLM Benchmark91.4%55.8%
ARC-AGI-289.2%—
SimpleBench81.9%—
NYT Connections (extended)92.7%—
ARC-AGI-198.5%—
CritPt28.6%—
Chess Puzzles41%—
EnigmaEval39.3%—
EBR-Bench39.5%—
LMArena Hard Prompts1508—
Mystery Game Puzzles52%—
DTBench98.4%—
LMCA61.1%—
Surface Evolver Bench95%—
Bench to the Future 30.13—
Epoch Capabilities Index163.6—

Math Not comparable

Claude Fable 5: 88.4 (#5), Hermes 4 405B: —

BenchmarkClaude Fable 5Hermes 4 405B
FrontierMath (Tiers 1-3)87%—
FrontierMath Tier 490.2%—
OTIS Mock AIME 2024-2025100%—
ProofBench95%—
LMArena Math1519—
FrontierMath Erdős0%—

Knowledge Not comparable

Claude Fable 5: 62.3 (#22), Hermes 4 405B: —

BenchmarkClaude Fable 5Hermes 4 405B
GPQA Diamond85.9%—
SimpleQA Verified70.7%—
LMArena Expert1534—

Multimodal Not comparable

Claude Fable 5: 45.6 (#14), Hermes 4 405B: —

BenchmarkClaude Fable 5Hermes 4 405B
LMArena Vision1326—
Blueprint-Bench 238.6%—
Furniture Assembly35.8%—
LMArena Document1496—

Multilingual Not comparable

Claude Fable 5: 57.6 (#8), Hermes 4 405B: —

BenchmarkClaude Fable 5Hermes 4 405B
LMArena Non-English1483—
LMArena Chinese1546—
LMArena French1509—
LMArena German1486—
LMArena Japanese1507—
LMArena Korean1493—
LMArena Russian1507—
LMArena Spanish1503—

Instruction Following Not comparable

Claude Fable 5: 78.8 (#7), Hermes 4 405B: —

BenchmarkClaude Fable 5Hermes 4 405B
LMArena Instruction Following1503—

Long Context Not comparable

Claude Fable 5: 46.3 (#22), Hermes 4 405B: —

BenchmarkClaude Fable 5Hermes 4 405B
LMArena Longer Query1510—

Writing & Preference Claude Fable 5 leads

Claude Fable 5: 76.1 (#5), Hermes 4 405B: 53.0

BenchmarkClaude Fable 5Hermes 4 405B
EQ-Bench Creative Writing19431421
LMArena Text1491—
LMArena Creative Writing1494—
EQ-Bench 41340—
LMArena Multi-Turn1505—

Frequently asked questions

Is Claude Fable 5 better than Hermes 4 405B?

Claude Fable 5 has enough public results to be ranked (#5); Hermes 4 405B does not yet, so treat this comparison as directional.

Which is cheaper, Claude Fable 5 or Hermes 4 405B?

Hermes 4 405B is cheaper. It lists at $1 per million input tokens and $3 per million output tokens; Claude Fable 5 lists at $10 and $50.

Which has the bigger context window?

Claude Fable 5 does, with 1M tokens against 131K.

How many benchmarks do Claude Fable 5 and Hermes 4 405B share?

2 benchmarks have published results for both models. Claude Fable 5 has 61 scored results on Noometry and Hermes 4 405B has 2.

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