Noometry

Model comparison

Gemini 3.8 Flash vs Hermes 4 405B

Gemini 3.8 Flash has enough public results to be ranked (#11); Hermes 4 405B does not yet, so treat this comparison as directional.

Last verified . 1 shared benchmarks.

Gemini 3.8 Flash Google

61.8

Rank #11 Confirmed

Hermes 4 405B Nous Research

37.6

Unranked Sparse

Summary

  • They share 1 benchmark with published results for both. Gemini 3.8 Flash 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 Gemini 3.8 Flash leads 76.9 to 26.1.
  • Both cost about the same: $0.75 input and $3.75 output per million tokens.
  • Gemini 3.8 Flash accepts more context: 1.05M tokens versus 131K.
  • Hermes 4 405B has downloadable open weights; the other is API-only.

Side by side

Gemini 3.8 FlashHermes 4 405B
ProviderGoogleNous Research
Noometry Index61.837.6
Released2026-09-02—
WeightsProprietaryOpen
Context window1.05M131K
Max output66K118K
Input $ / M tokens$0.75$1
Output $ / M tokens$3.75$3
Results tracked502

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Category by category

Coding Not comparable

Gemini 3.8 Flash: 59.2 (#15), Hermes 4 405B: —

BenchmarkGemini 3.8 FlashHermes 4 405B
DeepSWE73.8%—
FrontierCode41.2%—
CursorBench39.6%—
LMArena WebDev1584—
FrontierSWE19.6%—
SciCode56.6%—
WeirdML84.8%—
LMArena Coding1510—
ALE-Bench1,270—

Agentic & Tool Use Not comparable

Gemini 3.8 Flash: 41.8 (#21), Hermes 4 405B: —

BenchmarkGemini 3.8 FlashHermes 4 405B
APEX-Agents64.3%—
Remote Labor Index5.8%—
GDP.pdf23.4%—
Vending-Bench 25,094—

Reasoning Gemini 3.8 Flash leads

Gemini 3.8 Flash: 76.9 (#5), Hermes 4 405B: 26.1

BenchmarkGemini 3.8 FlashHermes 4 405B
ARC-AGI-289.2%—
Kagi LLM Benchmark—55.8%
NYT Connections (extended)97.4%—
ARC-AGI-198.5%—
CritPt18.3%—
Chess Puzzles61%—
LMArena Hard Prompts1508—
Mystery Game Puzzles47%—
DTBench95.7%—
LMCA52.9%—
Surface Evolver Bench76.9%—
Epoch Capabilities Index156.71—

Math Not comparable

Gemini 3.8 Flash: 65.3 (#28), Hermes 4 405B: —

BenchmarkGemini 3.8 FlashHermes 4 405B
FrontierMath (Tiers 1-3)68.4%—
FrontierMath Tier 422%—
OTIS Mock AIME 2024-202598.9%—
ProofBench48%—
LMArena Math1528—

Knowledge Not comparable

Gemini 3.8 Flash: 74.8 (#2), Hermes 4 405B: —

BenchmarkGemini 3.8 FlashHermes 4 405B
GPQA Diamond95.4%—
Humanity's Last Exam44.5%—
SimpleQA Verified69.7%—
LMArena Expert1524—

Multimodal Not comparable

Gemini 3.8 Flash: 40.7 (#45), Hermes 4 405B: —

BenchmarkGemini 3.8 FlashHermes 4 405B
LMArena Vision1314—
Blueprint-Bench 238.6%—
Furniture Assembly31.7%—

Multilingual Not comparable

Gemini 3.8 Flash: 58.0 (#5), Hermes 4 405B: —

BenchmarkGemini 3.8 FlashHermes 4 405B
LMArena Non-English1491—
LMArena Chinese1554—
LMArena French1498—
LMArena German1493—
LMArena Japanese1502—
LMArena Korean1459—
LMArena Russian1515—
LMArena Spanish1485—

Instruction Following Not comparable

Gemini 3.8 Flash: 78.0 (#13), Hermes 4 405B: —

BenchmarkGemini 3.8 FlashHermes 4 405B
LMArena Instruction Following1490—

Long Context Not comparable

Gemini 3.8 Flash: 46.3 (#24), Hermes 4 405B: —

BenchmarkGemini 3.8 FlashHermes 4 405B
LMArena Longer Query1508—

Writing & Preference Gemini 3.8 Flash leads

Gemini 3.8 Flash: 72.2 (#15), Hermes 4 405B: 52.9

BenchmarkGemini 3.8 FlashHermes 4 405B
EQ-Bench Creative Writing17481421
LMArena Text1499—
LMArena Creative Writing1492—
LMArena Multi-Turn1501—

Frequently asked questions

Is Gemini 3.8 Flash better than Hermes 4 405B?

Gemini 3.8 Flash has enough public results to be ranked (#11); Hermes 4 405B does not yet, so treat this comparison as directional.

Which is cheaper, Gemini 3.8 Flash or Hermes 4 405B?

Hermes 4 405B is cheaper. It lists at $1 per million input tokens and $3 per million output tokens; Gemini 3.8 Flash lists at $0.75 and $3.75.

Which has the bigger context window?

Gemini 3.8 Flash does, with 1.05M tokens against 131K.

How many benchmarks do Gemini 3.8 Flash and Hermes 4 405B share?

1 benchmark has published results for both models. Gemini 3.8 Flash has 50 scored results on Noometry and Hermes 4 405B has 2.

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