Gemini 3.8 Flash vs Hy4 preview
Gemini 3.8 Flash and Hy4 preview are closely matched at 51.8 and 51.5 on the LLM Stats Score.
Google · Tencent · Updated for 2026
Which is better?
Gemini 3.8 Flash and Hy4 preview are closely matched on the overall LLM Stats Score at 51.8 and 51.5.
In the 3 individual benchmarks reported for both models, Hy4 preview wins 2; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Gemini 3.8 Flash
- you want the most recent training data — it shipped Sep 2026
Choose Hy4 preview
- you value its reported benchmark strengths — it wins 2 of 3 exact shared results
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
13 reported for Gemini 3.8 Flash · 32 for Hy4 preview
Gemini 3.8 Flash outperforms in 1 benchmarks (Terminal-Bench 2.1), while Hy4 preview is better at 2 benchmarks (BioMysteryBench, GDPval-AA).
Hy4 preview shows notably better performance in the majority of benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only Gemini 3.8 Flash specifies input context (1,048,576 tokens). Only Gemini 3.8 Flash specifies output context (65,536 tokens).
Input capabilities
Documented input modalities across available providers
Gemini 3.8 Flash supports multimodal inputs, whereas Hy4 preview does not.
Gemini 3.8 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.
Gemini 3.8 Flash
Hy4 preview
License
Usage and distribution terms
Gemini 3.8 Flash is licensed under a proprietary license, while Hy4 preview uses Apache 2.0.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Apache 2.0
Open weights
Release Timeline
When each model was launched
Gemini 3.8 Flash was released on 2026-09-02, while Hy4 preview was released on 2026-08-28.
Gemini 3.8 Flash is 0 month newer than Hy4 preview.
Sep 2, 2026
0 days ago
5d newerAug 28, 2026
5 days ago
Knowledge Cutoff
When training data ends
Gemini 3.8 Flash has a documented knowledge cutoff of 2026-03-31, while Hy4 preview's cutoff date is not specified.
We can confirm Gemini 3.8 Flash's training data extends to 2026-03-31, but cannot make a direct comparison without Hy4 preview's cutoff date.
Mar 2026
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Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 3.8 Flash and Hy4 preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 3.8 Flash vs Hy4 preview.