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Grok-4 Fast Reasoning vs Nemotron Labs Dory 1.0 (4B)

Comparing Grok-4 Fast Reasoning and Nemotron Labs Dory 1.0 (4B) across benchmarks, pricing, and capabilities.

xAI · NVIDIA · Updated for 2026

Which is better?

Grok-4 Fast Reasoning and Nemotron Labs Dory 1.0 (4B) trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

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

Choose Grok-4 Fast Reasoning

  • you want predictable pricing at $0.20/M input and $0.50/M output

Choose Nemotron Labs Dory 1.0 (4B)

  • you want the most recent training data — it shipped Oct 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Grok-4 Fast Reasoning
xAI
Nemotron Labs Dory 1.0 (4B)
NVIDIA
Benchmark wins
—
—
Input price
$0.20 / M
— / M
Output price
$0.50 / M
— / M
Context window
2,000,000
—

Individual benchmarks

0 reported for Grok-4 Fast Reasoning · 10 for Nemotron Labs Dory 1.0 (4B)

No common benchmarks found

Grok-4 Fast Reasoning and Nemotron Labs Dory 1.0 (4B)don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Grok-4 Fast Reasoning specifies input context (2,000,000 tokens). Only Grok-4 Fast Reasoning specifies output context (30,000 tokens).

xAI
Grok-4 Fast Reasoning
Input2,000,000 tokens
Output30,000 tokens
NVIDIA
Nemotron Labs Dory 1.0 (4B)
Input- tokens
Output- tokens
Mon Oct 19 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Grok-4 Fast Reasoning supports multimodal inputs, whereas Nemotron Labs Dory 1.0 (4B) does not.

Grok-4 Fast Reasoning can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok-4 Fast Reasoning

Text
Images
Audio
Video

Nemotron Labs Dory 1.0 (4B)

Text
Images
Audio
Video

License

Usage and distribution terms

Grok-4 Fast Reasoning is licensed under a proprietary license, while Nemotron Labs Dory 1.0 (4B) uses OpenMDW License v1.1.

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

Grok-4 Fast Reasoning

Proprietary

Closed source

Nemotron Labs Dory 1.0 (4B)

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Grok-4 Fast Reasoning was released on 2025-08-28, while Nemotron Labs Dory 1.0 (4B) was released on 2026-10-16.

Nemotron Labs Dory 1.0 (4B) is 14 months newer than Grok-4 Fast Reasoning.

Grok-4 Fast Reasoning

Aug 28, 2025

1.1 years ago

Nemotron Labs Dory 1.0 (4B)

Oct 16, 2026

3 days ago

1.1yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Grok-4 Fast Reasoning and Nemotron Labs Dory 1.0 (4B) side-by-side, then vote on the output you prefer.

Grok-4 Fast Reasoning
✓ Preferred
Nemotron Labs Dory 1.0 (4B)
Open in Playground

FAQ

Common questions about Grok-4 Fast Reasoning vs Nemotron Labs Dory 1.0 (4B).

Which is better, Grok-4 Fast Reasoning or Nemotron Labs Dory 1.0 (4B)?

Grok-4 Fast Reasoning (xAI) and Nemotron Labs Dory 1.0 (4B) (NVIDIA) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Grok-4 Fast Reasoning compare to Nemotron Labs Dory 1.0 (4B) in benchmarks?

Nemotron Labs Dory 1.0 (4B) scores IFBench: 77.9%, GPQA: 72.4%, AA-LCR: 71.0%, SWE-Bench Verified: 59.5%, SciCode: 34.9%.

What are the context window sizes for Grok-4 Fast Reasoning and Nemotron Labs Dory 1.0 (4B)?

Grok-4 Fast Reasoning supports 2.0M tokens and Nemotron Labs Dory 1.0 (4B) 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 Grok-4 Fast Reasoning and Nemotron Labs Dory 1.0 (4B)?

Key differences include multimodal support (yes vs no), licensing (Proprietary vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok-4 Fast Reasoning and Nemotron Labs Dory 1.0 (4B)?

Grok-4 Fast Reasoning is developed by xAI and Nemotron Labs Dory 1.0 (4B) is developed by NVIDIA.

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