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Nemotron 3 Ultra (550B A55B) vs Qwen3.8 Flash

Qwen3.8 Flash leads the LLM Stats Score 49.1 to 36.3. Qwen3.8 Flash is 4.0x cheaper per token.

NVIDIA · Alibaba Cloud / Qwen Team · Updated for 2026

Which is better?

Qwen3.8 Flash leads the overall LLM Stats Score 49.1 to 36.3, ranking #21 overall.

In the 5 individual benchmarks reported for both models, Qwen3.8 Flash wins 3; this is a narrower head-to-head signal than the composite indexes.

On price, Qwen3.8 Flash is roughly 4.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Qwen3.8 Flash also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Nemotron 3 Ultra (550B A55B)

  • you need open weights you can self-host or fine-tune

Choose Qwen3.8 Flash

  • overall performance matters — it scores 49.1 and ranks #21 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 3 of 5 exact shared results
  • cost matters — it's about 4.0x cheaper per token
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Nemotron 3 Ultra (550B A55B)
NVIDIA
Qwen3.8 Flash
Alibaba Cloud / Qwen Team
Core performance indexes
LLM Stats Score
36.3
#79
49.1
#21
Reasoning
35.4
#82
48.8
#20
Coding
21.0
#93
36.1
#25
Agents
12.5
#101
35.1
#21
Cost, coverage & limits
Benchmark wins
2 of 5
3 of 5
Input price
$0.50 / M
$0.15 / M
Output price
$2.20 / M
$0.47 / M
Context window
262,144
1,000,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Nemotron 3 Ultra (550B A55B)
Qwen3.8 Flash
Math
36.4#39
32.5#57
Tool use
2.8#166
31.1#13
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

26 reported for Nemotron 3 Ultra (550B A55B) · 22 for Qwen3.8 Flash

5 shared

Nemotron 3 Ultra (550B A55B) outperforms in 2 benchmarks (Humanity's Last Exam, IFBench), while Qwen3.8 Flash is better at 3 benchmarks (GPQA, LiveCodeBench v6, SWE-bench Multilingual).

Qwen3.8 Flash has a slight edge in benchmark performance.

Thu Sep 17 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Qwen3.8 Flash costs less

For input processing, Nemotron 3 Ultra (550B A55B) ($0.50/1M tokens) is 3.3x more expensive than Qwen3.8 Flash ($0.15/1M tokens).

For output processing, Nemotron 3 Ultra (550B A55B) ($2.20/1M tokens) is 4.7x more expensive than Qwen3.8 Flash ($0.47/1M tokens).

In conclusion, Nemotron 3 Ultra (550B A55B) is more expensive than Qwen3.8 Flash.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Thu Sep 17 2026 • llm-stats.com
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input tokens$0.50
Output tokens$2.20
Best providerDeepinfra
Alibaba Cloud / Qwen Team
Qwen3.8 Flash
Input tokens$0.15
Output tokens$0.47
Best providerNovita
Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

425.0B diff

Nemotron 3 Ultra (550B A55B) has 425.0B more parameters than Qwen3.8 Flash, making it 340.0% larger.

NVIDIA
Nemotron 3 Ultra (550B A55B)
550.0Bparameters
Alibaba Cloud / Qwen Team
Qwen3.8 Flash
125.0Bparameters
550.0B
Nemotron 3 Ultra (550B A55B)
125.0B
Qwen3.8 Flash

Context Window

Maximum input and output token capacity

Qwen3.8 Flash accepts 1,000,000 input tokens compared to Nemotron 3 Ultra (550B A55B)'s 262,144 tokens. Nemotron 3 Ultra (550B A55B) can generate longer responses up to 262,144 tokens, while Qwen3.8 Flash is limited to 131,072 tokens.

NVIDIA
Nemotron 3 Ultra (550B A55B)
Input262,144 tokens
Output262,144 tokens
Alibaba Cloud / Qwen Team
Qwen3.8 Flash
Input1,000,000 tokens
Output131,072 tokens
Thu Sep 17 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Qwen3.8 Flash supports multimodal inputs, whereas Nemotron 3 Ultra (550B A55B) does not.

Qwen3.8 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.

Nemotron 3 Ultra (550B A55B)

Text
Images
Audio
Video

Qwen3.8 Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Nemotron 3 Ultra (550B A55B) is licensed under OpenMDW License v1.1, while Qwen3.8 Flash uses a proprietary license.

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

Nemotron 3 Ultra (550B A55B)

OpenMDW License v1.1

Open weights

Qwen3.8 Flash

Proprietary

Closed source

Release Timeline

When each model was launched

Nemotron 3 Ultra (550B A55B) was released on 2026-06-04, while Qwen3.8 Flash was released on 2026-08-26.

Qwen3.8 Flash is 3 months newer than Nemotron 3 Ultra (550B A55B).

Nemotron 3 Ultra (550B A55B)

Jun 4, 2026

3 months ago

Qwen3.8 Flash

Aug 26, 2026

3 weeks ago

2mo newer

Knowledge Cutoff

When training data ends

Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while Qwen3.8 Flash'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 Qwen3.8 Flash's cutoff date.

Nemotron 3 Ultra (550B A55B)

Sep 2025

Qwen3.8 Flash

—

Provider Availability

Nemotron 3 Ultra (550B A55B) is available from DeepInfra. Qwen3.8 Flash is available from Novita.

Nemotron 3 Ultra (550B A55B)

deepinfra logo
Deepinfra
Input Price:Input: $0.50/1MOutput Price:Output: $2.20/1M

Qwen3.8 Flash

novita logo
Novita
Input Price:Input: $0.15/1MOutput Price:Output: $0.47/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Nemotron 3 Ultra (550B A55B) and Qwen3.8 Flash side-by-side, then vote on the output you prefer.

Nemotron 3 Ultra (550B A55B)
✓ Preferred
Qwen3.8 Flash
Open in Playground

FAQ

Common questions about Nemotron 3 Ultra (550B A55B) vs Qwen3.8 Flash.

Which is better, Nemotron 3 Ultra (550B A55B) or Qwen3.8 Flash?

Qwen3.8 Flash leads the LLM Stats Score 49.1 to 36.3. Nemotron 3 Ultra (550B A55B) is made by NVIDIA and Qwen3.8 Flash is made by Alibaba Cloud / Qwen Team. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Nemotron 3 Ultra (550B A55B) compare to Qwen3.8 Flash in benchmarks?

Nemotron 3 Ultra (550B A55B) scores RULER: 94.7%, IMO-AnswerBench: 92.3%, PinchBench: 90.0%, LiveCodeBench v6: 89.0%, GPQA: 87.0%. Qwen3.8 Flash scores MathVision: 95.7%, LiveCodeBench v6: 91.9%, GPQA: 91.7%, CharXiv-R: 90.6%, RealWorldQA: 88.5%.

Is Nemotron 3 Ultra (550B A55B) cheaper than Qwen3.8 Flash?

Qwen3.8 Flash is 3.3x cheaper for input tokens. Nemotron 3 Ultra (550B A55B) costs $0.50/M input and $2.20/M output via deepinfra. Qwen3.8 Flash costs $0.15/M input and $0.47/M output via novita.

What are the context window sizes for Nemotron 3 Ultra (550B A55B) and Qwen3.8 Flash?

Nemotron 3 Ultra (550B A55B) supports 262K tokens and Qwen3.8 Flash supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Nemotron 3 Ultra (550B A55B) and Qwen3.8 Flash?

Key differences include LLM Stats Score (36.3 vs 49.1), context window (262K vs 1.0M), input pricing ($0.50 vs $0.15/M), multimodal support (no vs yes), licensing (OpenMDW License v1.1 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Nemotron 3 Ultra (550B A55B) and Qwen3.8 Flash?

Nemotron 3 Ultra (550B A55B) is developed by NVIDIA and Qwen3.8 Flash is developed by Alibaba Cloud / Qwen Team.

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