GPT-6.1 Sol vs Hy4 preview
GPT-6.1 Sol leads the LLM Stats Score 54.0 to 49.9.
OpenAI · Tencent · Updated for 2026
Which is better?
GPT-6.1 Sol leads the overall LLM Stats Score 54.0 to 49.9, ranking #7 overall.
In the 2 individual benchmarks reported for both models, GPT-6.1 Sol 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 GPT-6.1 Sol
- overall performance matters — it scores 54.0 and ranks #7 on LLM Stats
- you value its reported benchmark strengths — it wins 2 of 2 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
17 reported for GPT-6.1 Sol · 32 for Hy4 preview
GPT-6.1 Sol outperforms in 2 benchmarks (APEX-Agents, Humanity's Last Exam (no tools, text-only)), while Hy4 preview is better at 0 benchmarks.
GPT-6.1 Sol 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-6.1 Sol specifies input context (1,050,000 tokens). Only GPT-6.1 Sol specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-6.1 Sol supports multimodal inputs, whereas Hy4 preview does not.
GPT-6.1 Sol can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-6.1 Sol
Hy4 preview
License
Usage and distribution terms
GPT-6.1 Sol 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-6.1 Sol was released on 2026-09-29, while Hy4 preview was released on 2026-08-28.
GPT-6.1 Sol is 1 month newer than Hy4 preview.
Sep 29, 2026
2 weeks ago
1mo newerAug 28, 2026
1 months ago
Knowledge Cutoff
When training data ends
GPT-6.1 Sol has a documented knowledge cutoff of 2026-04-30, while Hy4 preview's cutoff date is not specified.
We can confirm GPT-6.1 Sol's training data extends to 2026-04-30, but cannot make a direct comparison without Hy4 preview's cutoff date.
Apr 2026
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Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-6.1 Sol and Hy4 preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-6.1 Sol vs Hy4 preview.