Model Comparison

Granite 3.3 8B Base vs Grok-4 HeavyWhich is better in 2026?

Comparing Granite 3.3 8B Base and Grok-4 Heavy across benchmarks, pricing, and capabilities.

Verdict: Granite 3.3 8B Base vs Grok-4 Heavy — which is better?

Granite 3.3 8B Base (by IBM) 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 Granite 3.3 8B Base if…

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

Choose Grok-4 Heavy if…

  • you are already invested in the xAI ecosystem

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Granite 3.3 8B Base 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

Input Capabilities

Supported data types and modalities

Both Granite 3.3 8B Base and Grok-4 Heavy support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Granite 3.3 8B Base

Text
Images
Audio
Video

Grok-4 Heavy

Text
Images
Audio
Video

License

Usage and distribution terms

Granite 3.3 8B Base is licensed under Apache 2.0, while Grok-4 Heavy uses a proprietary license.

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

Granite 3.3 8B Base

Apache 2.0

Open weights

Grok-4 Heavy

Proprietary

Closed source

Release Timeline

When each model was launched

Granite 3.3 8B Base was released on 2025-04-16, while Grok-4 Heavy's release date is not specified.

We can confirm Granite 3.3 8B Base's release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.

Granite 3.3 8B Base

Apr 16, 2025

1.2 years ago

Grok-4 Heavy

—

Knowledge Cutoff

When training data ends

Granite 3.3 8B Base has a knowledge cutoff of 2024-04-01, while Grok-4 Heavy has a cutoff of 2024-12-31.

Grok-4 Heavy has more recent training data (up to 2024-12-31), making it potentially better informed about events through that date compared to Granite 3.3 8B Base (2024-04-01).

Granite 3.3 8B Base

Apr 2024

Grok-4 Heavy

Dec 2024

8 mo newer

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

IBM
Has open weights
xAI

No standout differentiators in the data we have for this pair.

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Granite 3.3 8B Base and Grok-4 Heavy side-by-side, then vote on the output you prefer.

Granite 3.3 8B Base
✓ Preferred
Grok-4 Heavy
Open in Playground
AI Model Comparison Table
Feature
IBM
Granite 3.3 8B Base
xAI
Grok-4 Heavy

FAQ

Common questions about Granite 3.3 8B Base vs Grok-4 Heavy.

Which is better, Granite 3.3 8B Base or Grok-4 Heavy?

Granite 3.3 8B Base (IBM) 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 Granite 3.3 8B Base compare to Grok-4 Heavy in benchmarks?

Granite 3.3 8B Base scores HumanEval: 89.7%, AttaQ: 88.5%, HumanEval+: 86.1%, AIME 2024: 81.2%, HellaSwag: 80.1%. Grok-4 Heavy scores AIME 2025: 100.0%, HMMT25: 96.7%, GPQA: 88.4%, LiveCodeBench: 79.4%, USAMO25: 61.9%.

What are the main differences between Granite 3.3 8B Base and Grok-4 Heavy?

Key differences include licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Granite 3.3 8B Base and Grok-4 Heavy?

Granite 3.3 8B Base is developed by IBM and Grok-4 Heavy is developed by xAI.

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