The AI arena is free today

Open Superagent

GLM-5.3 vs Nemotron 3 Ultra (550B A55B)

GLM-5.3 significantly outperforms across most benchmarks.

Zhipu AI · NVIDIA · Updated for 2026

Which is better?

GLM-5.3 outperforms in 2 benchmarks (Humanity's Last Exam, Terminal-Bench 2.1), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks. GLM-5.3 significantly outperforms across most benchmarks.

Based on current benchmark, pricing, and model metadata for 2026.

Choose GLM-5.3

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you want the most recent training data — it shipped Aug 2026

Choose Nemotron 3 Ultra (550B A55B)

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

At a glance

The differences that matter most.

GLM-5.3
Zhipu AI
Nemotron 3 Ultra (550B A55B)
NVIDIA
Benchmark wins
2 of 2
0 of 2
Input price
$1.40 / M
— / M
Output price
$4.40 / M
— / M
Context window
1,000,000
—
Released
Aug 2026
Jun 2026
License
Unknown
OpenMDW License v1.1

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GLM-5.3 outperforms in 2 benchmarks (Humanity's Last Exam, Terminal-Bench 2.1), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks.

GLM-5.3 significantly outperforms across most benchmarks.

Tue Aug 25 2026 • llm-stats.com

Arena Performance

Playground indexes and blind preference scores

Model Size

Parameter count comparison

203.0B diff

GLM-5.3 has 203.0B more parameters than Nemotron 3 Ultra (550B A55B), making it 36.9% larger.

Zhipu AI
GLM-5.3
753.0Bparameters
NVIDIA
Nemotron 3 Ultra (550B A55B)
550.0Bparameters
753.0B
GLM-5.3
550.0B
Nemotron 3 Ultra (550B A55B)

Context Window

Maximum input and output token capacity

Only GLM-5.3 specifies input context (1,000,000 tokens). Only GLM-5.3 specifies output context (128,000 tokens).

Zhipu AI
GLM-5.3
Input1,000,000 tokens
Output128,000 tokens
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input- tokens
Output- tokens
Tue Aug 25 2026 • llm-stats.com

Release Timeline

When each model was launched

GLM-5.3 was released on 2026-08-14, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.

GLM-5.3 is 2 months newer than Nemotron 3 Ultra (550B A55B).

GLM-5.3

Aug 14, 2026

1 weeks ago

2mo newer
Nemotron 3 Ultra (550B A55B)

Jun 4, 2026

2 months ago

Knowledge Cutoff

When training data ends

Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while GLM-5.3'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 GLM-5.3's cutoff date.

GLM-5.3

—

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 GLM-5.3 and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.

GLM-5.3
✓ Preferred
Nemotron 3 Ultra (550B A55B)
Open in Playground

FAQ

Common questions about GLM-5.3 vs Nemotron 3 Ultra (550B A55B).

Which is better, GLM-5.3 or Nemotron 3 Ultra (550B A55B)?

GLM-5.3 significantly outperforms across most benchmarks. GLM-5.3 is made by Zhipu AI and Nemotron 3 Ultra (550B A55B) is made by NVIDIA. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GLM-5.3 compare to Nemotron 3 Ultra (550B A55B) in benchmarks?

GLM-5.3 scores Terminal-Bench 2.1: 88.2%, CyberGym: 84.5%, FrontierSWE: 78.1%, Toolathlon: 73.0%, DeepSWE 1.1: 66.9%. 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 GLM-5.3 and Nemotron 3 Ultra (550B A55B)?

GLM-5.3 supports 1.0M tokens and Nemotron 3 Ultra (550B A55B) supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GLM-5.3 and Nemotron 3 Ultra (550B A55B)?

Key differences include licensing (Unknown vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes GLM-5.3 and Nemotron 3 Ultra (550B A55B)?

GLM-5.3 is developed by Zhipu AI and Nemotron 3 Ultra (550B A55B) is developed by NVIDIA.

Related comparisons