Model Comparison

Grok-4 Heavy vs Nova Micro

Grok-4 Heavy significantly outperforms across most benchmarks.

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Grok-4 Heavy outperforms in 1 benchmarks (GPQA), while Nova Micro is better at 0 benchmarks.

Grok-4 Heavy significantly outperforms across most benchmarks.

Thu Apr 16 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Cost data unavailable.

Lowest available price from all providers
Thu Apr 16 2026 • llm-stats.com
xAI
Grok-4 Heavy
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
Amazon
Nova Micro
Input tokens$0.03
Output tokens$0.14
Best providerAWS Bedrock
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Context Window

Maximum input and output token capacity

Only Nova Micro specifies input context (128,000 tokens). Only Nova Micro specifies output context (128,000 tokens).

xAI
Grok-4 Heavy
Input- tokens
Output- tokens
Amazon
Nova Micro
Input128,000 tokens
Output128,000 tokens
Thu Apr 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok-4 Heavy supports multimodal inputs, whereas Nova Micro does not.

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

Grok-4 Heavy

Text
Images
Audio
Video

Nova Micro

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-4 Heavy

Proprietary

Closed source

Nova Micro

Proprietary

Closed source

Release Timeline

When each model was launched

Nova Micro was released on 2024-11-20, while Grok-4 Heavy's release date is not specified.

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

Grok-4 Heavy

Nova Micro

Nov 20, 2024

1.4 years ago

Knowledge Cutoff

When training data ends

Grok-4 Heavy has a documented knowledge cutoff of 2024-12-31, while Nova Micro'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 Nova Micro's cutoff date.

Grok-4 Heavy

Dec 2024

Nova Micro

Outputs Comparison

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Key Takeaways

Supports multimodal inputs
Higher GPQA score (88.4% vs 40.0%)
Larger context window (128,000 tokens)

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-4 Heavy
Amazon
Nova Micro

FAQ

Common questions about Grok-4 Heavy vs Nova Micro

Grok-4 Heavy significantly outperforms across most benchmarks. Grok-4 Heavy is made by xAI and Nova Micro is made by Amazon. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Grok-4 Heavy scores AIME 2025: 100.0%, HMMT25: 96.7%, GPQA: 88.4%, LiveCodeBench: 79.4%, USAMO25: 61.9%. Nova Micro scores GSM8k: 92.3%, ARC-C: 90.2%, Translation Set1→en COMET22: 88.7%, Translation en→Set1 COMET22: 88.5%, IFEval: 87.2%.
Grok-4 Heavy supports an unknown number of tokens and Nova Micro supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.
Grok-4 Heavy is developed by xAI and Nova Micro is developed by Amazon.