Model Comparison

Command R+ vs Grok-4 Heavy

Comparing Command R+ and Grok-4 Heavy across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Command R+ and Grok-4 Heavy don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Command R+ specifies input context (128,000 tokens). Only Command R+ specifies output context (128,000 tokens).

Cohere
Command R+
Input128,000 tokens
Output128,000 tokens
xAI
Grok-4 Heavy
Input- tokens
Output- tokens
Wed May 13 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok-4 Heavy supports multimodal inputs, whereas Command R+ does not.

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

Command R+

Text
Images
Audio
Video

Grok-4 Heavy

Text
Images
Audio
Video

License

Usage and distribution terms

Command R+ is licensed under CC BY-NC, while Grok-4 Heavy uses a proprietary license.

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

Command R+

CC BY-NC

Open weights

Grok-4 Heavy

Proprietary

Closed source

Release Timeline

When each model was launched

Command R+ was released on 2024-08-30, while Grok-4 Heavy's release date is not specified.

We can confirm Command R+'s release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.

Command R+

Aug 30, 2024

1.7 years ago

Grok-4 Heavy

—

Knowledge Cutoff

When training data ends

Grok-4 Heavy has a documented knowledge cutoff of 2024-12-31, while Command R+'s cutoff date is not specified.

We can confirm Grok-4 Heavy's training data extends to 2024-12-31, but cannot make a direct comparison without Command R+'s cutoff date.

Command R+

—

Grok-4 Heavy

Dec 2024

Outputs Comparison

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Key Takeaways

Cohere
Larger context window (128,000 tokens)
Has open weights
xAI
Supports multimodal inputs

Detailed Comparison

AI Model Comparison Table
Feature
Cohere
Command R+
xAI
Grok-4 Heavy

FAQ

Common questions about Command R+ vs Grok-4 Heavy.

Which is better, Command R+ or Grok-4 Heavy?

Command R+ (Cohere) and Grok-4 Heavy (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Command R+ compare to Grok-4 Heavy in benchmarks?

Command R+ scores HellaSwag: 88.6%, Winogrande: 85.4%, MMLU: 75.7%, ARC-C: 71.0%, GSM8k: 70.7%. Grok-4 Heavy scores AIME 2025: 100.0%, HMMT25: 96.7%, GPQA: 88.4%, LiveCodeBench: 79.4%, USAMO25: 61.9%.

What are the context window sizes for Command R+ and Grok-4 Heavy?

Command R+ supports 128K tokens and Grok-4 Heavy 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 Command R+ and Grok-4 Heavy?

Key differences include multimodal support (no vs yes), licensing (CC BY-NC vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Command R+ and Grok-4 Heavy?

Command R+ is developed by Cohere and Grok-4 Heavy is developed by xAI.