GPT-6 Luna vs Hy4 preview
GPT-6 Luna and Hy4 preview are closely matched at 44.5 and 50.4 on the LLM Stats Score.
OpenAI · Tencent · Updated for 2026
Which is better?
GPT-6 Luna and Hy4 preview are closely matched on the overall LLM Stats Score at 44.5 and 50.4.
In the 1 individual benchmarks reported for both models, GPT-6 Luna wins 1; 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 GPT-6 Luna
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- you want the most recent training data — it shipped Sep 2026
Choose Hy4 preview
- 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
5 reported for GPT-6 Luna · 32 for Hy4 preview
GPT-6 Luna outperforms in 1 benchmarks (Agents' Last Exam), while Hy4 preview is better at 0 benchmarks.
GPT-6 Luna significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only GPT-6 Luna specifies input context (1,050,000 tokens). Only GPT-6 Luna specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-6 Luna supports multimodal inputs, whereas Hy4 preview does not.
GPT-6 Luna can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-6 Luna
Hy4 preview
License
Usage and distribution terms
GPT-6 Luna 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
GPT-6 Luna was released on 2026-09-22, while Hy4 preview was released on 2026-08-28.
GPT-6 Luna is 1 month newer than Hy4 preview.
Sep 22, 2026
0 days ago
3w newerAug 28, 2026
3 weeks ago
Knowledge Cutoff
When training data ends
GPT-6 Luna has a documented knowledge cutoff of 2026-05-18, while Hy4 preview's cutoff date is not specified.
We can confirm GPT-6 Luna's training data extends to 2026-05-18, but cannot make a direct comparison without Hy4 preview's cutoff date.
May 2026
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Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-6 Luna and Hy4 preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-6 Luna vs Hy4 preview.