GPT-5.3 Chat vs Hy4 preview
Hy4 preview leads the LLM Stats Score 51.0 to 29.6.
OpenAI · Tencent · Updated for 2026
Which is better?
Hy4 preview leads the overall LLM Stats Score 51.0 to 29.6, ranking #14 overall.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-5.3 Chat
- you want predictable pricing at $1.75/M input and $14.00/M output
Choose Hy4 preview
- overall performance matters — it scores 51.0 and ranks #14 on LLM Stats
- you want the most recent training data — it shipped Aug 2026
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
2 reported for GPT-5.3 Chat · 32 for Hy4 preview
GPT-5.3 Chat and Hy4 previewdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only GPT-5.3 Chat specifies input context (128,000 tokens). Only GPT-5.3 Chat specifies output context (16,384 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5.3 Chat supports multimodal inputs, whereas Hy4 preview does not.
GPT-5.3 Chat can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.3 Chat
Hy4 preview
License
Usage and distribution terms
GPT-5.3 Chat 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-5.3 Chat was released on 2026-03-04, while Hy4 preview was released on 2026-08-28.
Hy4 preview is 6 months newer than GPT-5.3 Chat.
Mar 4, 2026
6 months ago
Aug 28, 2026
3 weeks ago
5mo newerKnowledge Cutoff
When training data ends
GPT-5.3 Chat has a documented knowledge cutoff of 2025-08-31, while Hy4 preview's cutoff date is not specified.
We can confirm GPT-5.3 Chat's training data extends to 2025-08-31, but cannot make a direct comparison without Hy4 preview's cutoff date.
Aug 2025
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Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.3 Chat and Hy4 preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.3 Chat vs Hy4 preview.