GPT-5.4 vs Hy4 preview
Hy4 preview leads the LLM Stats Score 51.5 to 42.8.
OpenAI · Tencent · Updated for 2026
Which is better?
Hy4 preview leads the overall LLM Stats Score 51.5 to 42.8, ranking #10 overall.
In the 4 individual benchmarks reported for both models, Hy4 preview wins 3; 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-5.4
- you want predictable pricing at $2.50/M input and $15.00/M output
Choose Hy4 preview
- overall performance matters — it scores 51.5 and ranks #10 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 3 of 4 exact shared results
- 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.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
23 reported for GPT-5.4 · 32 for Hy4 preview
GPT-5.4 outperforms in 1 benchmarks (GPQA), while Hy4 preview is better at 3 benchmarks (MCP Atlas, SWE-Bench Pro, Toolathlon).
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 GPT-5.4 specifies input context (1,000,000 tokens). Only GPT-5.4 specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5.4 supports multimodal inputs, whereas Hy4 preview does not.
GPT-5.4 can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.4
Hy4 preview
License
Usage and distribution terms
GPT-5.4 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-5.4 was released on 2026-03-05, while Hy4 preview was released on 2026-08-28.
Hy4 preview is 6 months newer than GPT-5.4.
Mar 5, 2026
5 months ago
Aug 28, 2026
2 days ago
5mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.4 and Hy4 preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.4 vs Hy4 preview.