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Hy4 preview vs Nemotron 3 Ultra (550B A55B)

Hy4 preview leads the LLM Stats Score 51.0 to 36.3.

Tencent · NVIDIA · Updated for 2026

Which is better?

Hy4 preview leads the overall LLM Stats Score 51.0 to 36.3, ranking #14 overall.

In the 4 individual benchmarks reported for both models, Hy4 preview wins 4; 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 Hy4 preview

  • overall performance matters — it scores 51.0 and ranks #14 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 4 of 4 exact shared results
  • you want the most recent training data — it shipped Aug 2026

Choose Nemotron 3 Ultra (550B A55B)

  • you want predictable pricing at $0.50/M input and $2.20/M output

At a glance

The differences that matter most.

Hy4 preview
Tencent
Nemotron 3 Ultra (550B A55B)
NVIDIA
Core performance indexes
LLM Stats Score
51.0
#14
36.3
#79
Reasoning
50.8
#10
35.4
#82
Coding
39.7
#14
21.0
#92
Agents
36.7
#16
12.5
#101
Cost, coverage & limits
Benchmark wins
4 of 4
0 of 4
Input price
— / M
$0.50 / M
Output price
— / M
$2.20 / M
Context window
—
262,144

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Hy4 preview
Nemotron 3 Ultra (550B A55B)
Math
41.0#11
36.4#39
Tool use
30.9#14
2.8#166
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

32 reported for Hy4 preview · 26 for Nemotron 3 Ultra (550B A55B)

4 shared

Hy4 preview outperforms in 4 benchmarks (CritPT, GPQA, SWE-bench Multilingual, Terminal-Bench 2.1), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks.

Hy4 preview significantly outperforms across most benchmarks.

Sun Sep 20 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

220.0B diff

Hy4 preview has 220.0B more parameters than Nemotron 3 Ultra (550B A55B), making it 40.0% larger.

Tencent
Hy4 preview
770.0Bparameters
NVIDIA
Nemotron 3 Ultra (550B A55B)
550.0Bparameters
770.0B
Hy4 preview
550.0B
Nemotron 3 Ultra (550B A55B)

Context Window

Maximum input and output token capacity

Only Nemotron 3 Ultra (550B A55B) specifies input context (262,144 tokens). Only Nemotron 3 Ultra (550B A55B) specifies output context (262,144 tokens).

Tencent
Hy4 preview
Input- tokens
Output- tokens
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input262,144 tokens
Output262,144 tokens
Sun Sep 20 2026 • llm-stats.com

License

Usage and distribution terms

Hy4 preview is licensed under Apache 2.0, while Nemotron 3 Ultra (550B A55B) uses OpenMDW License v1.1.

License differences may affect how you can use these models in commercial or open-source projects.

Hy4 preview

Apache 2.0

Open weights

Nemotron 3 Ultra (550B A55B)

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Hy4 preview was released on 2026-08-28, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.

Hy4 preview is 3 months newer than Nemotron 3 Ultra (550B A55B).

Hy4 preview

Aug 28, 2026

3 weeks ago

2mo newer
Nemotron 3 Ultra (550B A55B)

Jun 4, 2026

3 months ago

Knowledge Cutoff

When training data ends

Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while Hy4 preview's cutoff date is not specified.

We can confirm Nemotron 3 Ultra (550B A55B)'s training data extends to 2025-09-30, but cannot make a direct comparison without Hy4 preview's cutoff date.

Hy4 preview

—

Nemotron 3 Ultra (550B A55B)

Sep 2025

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Hy4 preview and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.

Hy4 preview
✓ Preferred
Nemotron 3 Ultra (550B A55B)
Open in Playground

FAQ

Common questions about Hy4 preview vs Nemotron 3 Ultra (550B A55B).

Which is better, Hy4 preview or Nemotron 3 Ultra (550B A55B)?

Hy4 preview leads the LLM Stats Score 51.0 to 36.3. Hy4 preview is made by Tencent and Nemotron 3 Ultra (550B A55B) is made by NVIDIA. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Hy4 preview compare to Nemotron 3 Ultra (550B A55B) in benchmarks?

Hy4 preview scores GPQA: 92.3%, Terminal-Bench 2.1: 85.4%, WideSearch: 83.9%, MCP Atlas: 83.7%, SWE-bench Multilingual: 82.9%. Nemotron 3 Ultra (550B A55B) scores RULER: 94.7%, IMO-AnswerBench: 92.3%, PinchBench: 90.0%, LiveCodeBench v6: 89.0%, GPQA: 87.0%.

What are the context window sizes for Hy4 preview and Nemotron 3 Ultra (550B A55B)?

Hy4 preview supports an unknown number of tokens and Nemotron 3 Ultra (550B A55B) supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Hy4 preview and Nemotron 3 Ultra (550B A55B)?

Key differences include LLM Stats Score (51.0 vs 36.3), licensing (Apache 2.0 vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Hy4 preview and Nemotron 3 Ultra (550B A55B)?

Hy4 preview is developed by Tencent and Nemotron 3 Ultra (550B A55B) is developed by NVIDIA.

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