ZMIME
Comparison · 2 models · Updated Oct 4, 2026

Qwen3.5 Plus vs Nemotron 3 Ultra 550B A55B

Qwen3.5 Plus comes out ahead, 66 to 62 on our weighted score, and it is the cheaper option too.

  1. Our pick

    Alibaba (Qwen)

    Qwen3.5 Plus

    Released Feb 16, 2026

    66/100
    • ECI146.8
    • Price$0.40 / $2.40
    • Context1M
    Full specs Remove Qwen3.5 Plus

  2. NVIDIA

    Nemotron 3 Ultra 550B A55B

    Released Jun 4, 2026

    62/100
    • ECI146.2
    • Price$0.50 / $2.50
    • Context1M
    Full specs Remove Nemotron 3 Ultra 550B A55B

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Qwen3.5 Plus is our pick

Qwen3.5 Plus is the better all-round choice, scoring 66/100 against Nemotron 3 Ultra 550B A55B (62). It leads on price and inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityQwen3.5 PlusCapabilities Index (ECI): Qwen3.5 Plus 146.8 · Nemotron 3 Ultra 550B A55B 146.2
  • Lowest priceQwen3.5 PlusQwen3.5 Plus $0.90 · Nemotron 3 Ultra 550B A55B $1.00 per 1M tokens (3:1 blend)
  • Longest contextAbout the sameQwen3.5 Plus 1,000,000 · Nemotron 3 Ultra 550B A55B 1,000,000 tokens
  • Widest inputsQwen3.5 PlusQwen3.5 Plus: Text, Images, Video · Nemotron 3 Ultra 550B A55B: Text
  • Self-hostingNemotron 3 Ultra 550B A55BPublishes downloadable weights
How the score is built
MeasureWeightQwen3.5 PlusNemotron 3 Ultra 550B A55B
CapabilityCapabilities Index (ECI)50%7473
Price25%5250
Inputs & features15%7045
Context window10%6060
Overall100%66/10062/100
02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Qwen3.5 Plus vs Nemotron 3 Ultra 550B A55B specifications side by side
SpecificationQwen3.5 PlusAlibaba (Qwen)Nemotron 3 Ultra 550B A55BNVIDIA
Capability
Capabilities Index (ECI)146.8 (best)146.2
ECI rank#65 of 148 (best)#70 of 148
GPQA DiamondGraduate-level science questions84.9%85.4% (best)
OTIS Mock AIME 2024–2025Competition mathematics86.7%86.7%
SimpleQA VerifiedShort factual questions25.4%—
Price per million tokens
Input$0.40 (best)$0.50
Output$2.40 (best)$2.50
Cached input—$0.15
Blended (3:1)$0.90 (best)$1.00
Long-context rateSame rateSame rate
Price sourceOfficial Alibaba APIOfficial Nvidia API
Limits
Context window1,000,000 tokens1,000,000 tokens
Max output65,536 tokens128,000 tokens (best)
Inputs and features
TextYesYes
ImagesYesNo
PDFsNoNo
AudioNoNo
VideoYesNo
ReasoningYesYes
Tool callingYesYes
Structured outputNoYes
Availability
WeightsProprietaryOpen
API model IDqwen3.5-plusnvidia/nemotron-3-ultra-550b-a55b
API providers1021 (best)
ReleasedFeb 16, 2026Jun 4, 2026
Knowledge cutoffApr 2025—
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Qwen3.5 Plus$8.80
  • Nemotron 3 Ultra 550B A55B$10.00
04 — Questions

Which should you choose?

Which is better: Qwen3.5 Plus or Nemotron 3 Ultra 550B A55B?

Qwen3.5 Plus is the better all-round choice, scoring 66/100 against Nemotron 3 Ultra 550B A55B (62). It leads on price and inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Qwen3.5 Plus or Nemotron 3 Ultra 550B A55B?

Qwen3.5 Plus is cheaper at $0.40 input / $2.40 output per million tokens (official Alibaba API price). Nemotron 3 Ultra 550B A55B costs $0.50 input / $2.50 output per million tokens (official Nvidia API price). At a typical mix of three input tokens to one output token, that is $0.90 per million tokens for Qwen3.5 Plus versus $1.00 for Nemotron 3 Ultra 550B A55B (1.1× as much).

Which scores higher on benchmarks?

Qwen3.5 Plus scores higher on the Capabilities Index (ECI): Qwen3.5 Plus 146.8 (#65 of 148) and Nemotron 3 Ultra 550B A55B 146.2 (#70 of 148). The confidence ranges of the top two overlap (144.6–148.1 vs 143.9–148.1), so treat the gap as small. On individual benchmarks: GPQA Diamond — Nemotron 3 Ultra 550B A55B 85.4%, Qwen3.5 Plus 84.9%; OTIS Mock AIME 2024–2025 — Qwen3.5 Plus 86.7%, Nemotron 3 Ultra 550B A55B 86.7%.

Which is better for coding?

There are no published SWE-bench Verified results for Qwen3.5 Plus and Nemotron 3 Ultra 550B A55B yet, so there is no like-for-like coding score. On overall capability, Qwen3.5 Plus leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.

Which has the bigger context window?

Qwen3.5 Plus and Nemotron 3 Ultra 550B A55B share the same 1,000,000-token context window. Maximum output per response: Qwen3.5 Plus up to 65,536, Nemotron 3 Ultra 550B A55B up to 128,000 tokens.

Which can read images, PDFs, audio or video?

Qwen3.5 Plus accepts text, images and video; Nemotron 3 Ultra 550B A55B accepts text. Qwen3.5 Plus handles the widest range of inputs.

Are any of these open source?

Nemotron 3 Ultra 550B A55B publishes its weights and can be self-hosted; Qwen3.5 Plus is proprietary.

Which is newer?

Nemotron 3 Ultra 550B A55B is the newest, released Jun 4, 2026. Qwen3.5 Plus came out Feb 16, 2026. Knowledge cutoff: Qwen3.5 Plus Apr 2025.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.

05 — Keep comparing

Related comparisons