Noometry

Model comparison

Gemini 3.8 Flash vs Hy4 preview

Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 45.3 on the Noometry Index.

Last verified . 3 shared benchmarks.

Gemini 3.8 Flash Google

61.8

Rank #11 Confirmed

Hy4 preview Tencent

45.3

Rank #73 Reported

Summary

  • They share 3 benchmarks with published results for both. Gemini 3.8 Flash scores higher in 3 categories and Hy4 preview in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Gemini 3.8 Flash leads 76.9 to 31.9.
  • The biggest single-benchmark swing is NYT Connections (extended): 97.4% for Gemini 3.8 Flash and 68.2% for Hy4 preview.
  • Hy4 preview is cheaper at $0.75 / $2.25 per million input/output tokens, against $0.75 / $3.75 for Gemini 3.8 Flash.
  • Hy4 preview has downloadable open weights; the other is API-only.

Side by side

Gemini 3.8 FlashHy4 preview
ProviderGoogleTencent
Noometry Index61.845.3
Released2026-09-022026-08-28
WeightsProprietaryOpen
Context window1.05M1.05M
Max output66K64K
Input $ / M tokens$0.75$0.75
Output $ / M tokens$3.75$2.25
Results tracked503

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Gemini 3.8 Flash leads

Gemini 3.8 Flash: 59.2 (#15), Hy4 preview: 51.6 (#38)

BenchmarkGemini 3.8 FlashHy4 preview
LMArena WebDev15841632
DeepSWE73.8%—
FrontierCode41.2%—
CursorBench39.6%—
FrontierSWE19.6%—
SciCode56.6%—
WeirdML84.8%—
LMArena Coding1510—
ALE-Bench1,270—

Agentic & Tool Use Not comparable

Gemini 3.8 Flash: 41.8 (#21), Hy4 preview: —

BenchmarkGemini 3.8 FlashHy4 preview
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), Hy4 preview: 31.9 (#79)

BenchmarkGemini 3.8 FlashHy4 preview
NYT Connections (extended)97.4%68.2%
ARC-AGI-289.2%—
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 Gemini 3.8 Flash leads

Gemini 3.8 Flash: 65.3 (#28), Hy4 preview: 55.7 (#42)

BenchmarkGemini 3.8 FlashHy4 preview
ProofBench48%75%
FrontierMath (Tiers 1-3)68.4%—
FrontierMath Tier 422%—
OTIS Mock AIME 2024-202598.9%—
LMArena Math1528—

Knowledge Not comparable

Gemini 3.8 Flash: 74.8 (#2), Hy4 preview: —

BenchmarkGemini 3.8 FlashHy4 preview
GPQA Diamond95.4%—
Humanity's Last Exam44.5%—
SimpleQA Verified69.7%—
LMArena Expert1524—

Multimodal Not comparable

Gemini 3.8 Flash: 40.7 (#45), Hy4 preview: —

BenchmarkGemini 3.8 FlashHy4 preview
LMArena Vision1314—
Blueprint-Bench 238.6%—
Furniture Assembly31.7%—

Multilingual Not comparable

Gemini 3.8 Flash: 58.0 (#5), Hy4 preview: —

BenchmarkGemini 3.8 FlashHy4 preview
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), Hy4 preview: —

BenchmarkGemini 3.8 FlashHy4 preview
LMArena Instruction Following1490—

Long Context Not comparable

Gemini 3.8 Flash: 46.3 (#24), Hy4 preview: —

BenchmarkGemini 3.8 FlashHy4 preview
LMArena Longer Query1508—

Writing & Preference Not comparable

Gemini 3.8 Flash: 72.2 (#15), Hy4 preview: —

BenchmarkGemini 3.8 FlashHy4 preview
LMArena Text1499—
LMArena Creative Writing1492—
EQ-Bench Creative Writing1748—
LMArena Multi-Turn1501—

Frequently asked questions

Is Gemini 3.8 Flash better than Hy4 preview?

Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 45.3 on the Noometry Index.

Which is cheaper, Gemini 3.8 Flash or Hy4 preview?

Hy4 preview is cheaper. It lists at $0.75 per million input tokens and $2.25 per million output tokens; Gemini 3.8 Flash lists at $0.75 and $3.75.

Is Gemini 3.8 Flash or Hy4 preview better for coding?

Gemini 3.8 Flash scores higher on coding benchmarks: 59.2 versus 51.6 in the Noometry coding category.

Which has the bigger context window?

Both accept 1.05M tokens.

How many benchmarks do Gemini 3.8 Flash and Hy4 preview share?

3 benchmarks have published results for both models. Gemini 3.8 Flash has 50 scored results on Noometry and Hy4 preview has 3.

Related comparisons

Go deeper