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Model Comparison

Grok-2 Image 1212 vs Grok-4 HeavyWhich is better in 2026?

Comparing Grok-2 Image 1212 and Grok-4 Heavy across benchmarks, pricing, and capabilities.

Verdict: Grok-2 Image 1212 vs Grok-4 Heavy — which is better?

Grok-2 Image 1212 (by xAI) and Grok-4 Heavy (by xAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Choose Grok-2 Image 1212 if…

  • you are already invested in the xAI ecosystem

Choose Grok-4 Heavy if…

  • you are already invested in the xAI ecosystem

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok-2 Image 1212 and Grok-4 Heavydon'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 Grok-2 Image 1212 specifies input context (131,072 tokens).

xAI
Grok-2 Image 1212
Input131,072 tokens
Output- tokens
xAI
Grok-4 Heavy
Input- tokens
Output- tokens
Fri Aug 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok-4 Heavy supports multimodal inputs, whereas Grok-2 Image 1212 does not.

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

Grok-2 Image 1212

Text
Images
Audio
Video

Grok-4 Heavy

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Grok-2 Image 1212

Proprietary

Closed source

Grok-4 Heavy

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-2 Image 1212 was released on 2024-12-12, while Grok-4 Heavy's release date is not specified.

We can confirm Grok-2 Image 1212's release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.

Grok-2 Image 1212

Dec 12, 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 Grok-2 Image 1212'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 Grok-2 Image 1212's cutoff date.

Grok-2 Image 1212

—

Grok-4 Heavy

Dec 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

xAI
Larger context window (131,072 tokens)
xAI
Supports multimodal inputs

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok-2 Image 1212 and Grok-4 Heavy side-by-side, then vote on the output you prefer.

Grok-2 Image 1212
✓ Preferred
Grok-4 Heavy
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok-2 Image 1212
xAI
Grok-4 Heavy

FAQ

Common questions about Grok-2 Image 1212 vs Grok-4 Heavy.

Which is better, Grok-2 Image 1212 or Grok-4 Heavy?

Grok-2 Image 1212 (xAI) 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 Grok-2 Image 1212 compare to Grok-4 Heavy in benchmarks?

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 Grok-2 Image 1212 and Grok-4 Heavy?

Grok-2 Image 1212 supports 131K 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 Grok-2 Image 1212 and Grok-4 Heavy?

Key differences include multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

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