Noometry

Model comparison

Claude Sonnet 5 vs Hermes 4 405B

Claude Sonnet 5 has enough public results to be ranked (#26); Hermes 4 405B does not yet, so treat this comparison as directional.

Last verified . 1 shared benchmarks.

Claude Sonnet 5 Anthropic

54.5

Rank #26 Confirmed

Hermes 4 405B Nous Research

37.1

Unranked Sparse

Summary

  • They share 1 benchmark with published results for both. Claude Sonnet 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 Sonnet 5 leads 48.2 to 25.3.
  • Hermes 4 405B is cheaper at $1 / $3 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.
  • Claude Sonnet 5 accepts more context: 1M tokens versus 131K.
  • Hermes 4 405B has downloadable open weights; the other is API-only.

Side by side

Claude Sonnet 5Hermes 4 405B
ProviderAnthropicNous Research
Noometry Index54.537.1
Released2026-06-29—
WeightsProprietaryOpen
Context window1M131K
Max output128K118K
Input $ / M tokens$2$1
Output $ / M tokens$10$3
Results tracked512

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Category by category

Coding Not comparable

Claude Sonnet 5: 55.5 (#20), Hermes 4 405B: —

BenchmarkClaude Sonnet 5Hermes 4 405B
DeepSWE53.8%—
FrontierCode42.7%—
CursorBench34.1%—
LMArena WebDev1540—
SciCode53.6%—
GSO37.3%—
WeirdML68.8%—
LMArena Coding1483—
ALE-Bench1,463—

Agentic & Tool Use Not comparable

Claude Sonnet 5: 42.7 (#16), Hermes 4 405B: —

BenchmarkClaude Sonnet 5Hermes 4 405B
APEX-Agents54.5%—
GBAEval65.3%—
LMArena Search1194—
Vending-Bench 26,378—

Reasoning Claude Sonnet 5 leads

Claude Sonnet 5: 48.2 (#37), Hermes 4 405B: 25.3

BenchmarkClaude Sonnet 5Hermes 4 405B
SimpleBench60.6%—
Kagi LLM Benchmark—55.8%
NYT Connections (extended)75.1%—
CritPt16.9%—
Chess Puzzles35%—
LMArena Hard Prompts1461—
Mystery Game Puzzles35%—
DTBench92.5%—
LMCA50%—
Surface Evolver Bench60%—
Bench to the Future 30.14—
Epoch Capabilities Index156.34—
ForecastBench61.1—

Math Not comparable

Claude Sonnet 5: 66.1 (#21), Hermes 4 405B: —

BenchmarkClaude Sonnet 5Hermes 4 405B
FrontierMath (Tiers 1-3)65.6%—
FrontierMath Tier 429.3%—
OTIS Mock AIME 2024-202594.7%—
ProofBench77%—
LMArena Math1467—

Knowledge Not comparable

Claude Sonnet 5: 55.7 (#42), Hermes 4 405B: —

BenchmarkClaude Sonnet 5Hermes 4 405B
GPQA Diamond90.5%—
SimpleQA Verified33.7%—
LMArena Expert1491—

Multimodal Not comparable

Claude Sonnet 5: 42.4 (#26), Hermes 4 405B: —

BenchmarkClaude Sonnet 5Hermes 4 405B
LMArena Vision1275—
Blueprint-Bench 224.9%—
LMArena Document1466—

Multilingual Not comparable

Claude Sonnet 5: 54.0 (#55), Hermes 4 405B: —

BenchmarkClaude Sonnet 5Hermes 4 405B
LMArena Non-English1431—
LMArena Chinese1475—
LMArena French1457—
LMArena German1448—
LMArena Japanese1422—
LMArena Korean1411—
LMArena Russian1452—
LMArena Spanish1436—

Instruction Following Not comparable

Claude Sonnet 5: 76.6 (#39), Hermes 4 405B: —

BenchmarkClaude Sonnet 5Hermes 4 405B
LMArena Instruction Following1453—

Long Context Not comparable

Claude Sonnet 5: 44.8 (#53), Hermes 4 405B: —

BenchmarkClaude Sonnet 5Hermes 4 405B
LMArena Longer Query1464—

Writing & Preference Claude Sonnet 5 leads

Claude Sonnet 5: 69.4 (#24), Hermes 4 405B: 53.0

BenchmarkClaude Sonnet 5Hermes 4 405B
EQ-Bench Creative Writing17941421
LMArena Text1443—
LMArena Creative Writing1416—
EQ-Bench 41236—
LMArena Multi-Turn1454—

Frequently asked questions

Is Claude Sonnet 5 better than Hermes 4 405B?

Claude Sonnet 5 has enough public results to be ranked (#26); Hermes 4 405B does not yet, so treat this comparison as directional.

Which is cheaper, Claude Sonnet 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 Sonnet 5 lists at $2 and $10.

Which has the bigger context window?

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

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

1 benchmark has published results for both models. Claude Sonnet 5 has 51 scored results on Noometry and Hermes 4 405B has 2.

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