Model Comparison

Grok 4 Fast vs Nova Micro

Grok 4 Fast significantly outperforms across most benchmarks. Nova Micro is 4.8x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

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

Grok 4 Fast significantly outperforms across most benchmarks.

Sat May 16 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Nova Micro costs less

For input processing, Grok 4 Fast ($0.20/1M tokens) is 6.7x more expensive than Nova Micro ($0.03/1M tokens).

For output processing, Grok 4 Fast ($0.50/1M tokens) is 3.6x more expensive than Nova Micro ($0.14/1M tokens).

In conclusion, Grok 4 Fast is more expensive than Nova Micro.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sat May 16 2026 • llm-stats.com
xAI
Grok 4 Fast
Input tokens$0.20
Output tokens$0.50
Best providerxAI
Amazon
Nova Micro
Input tokens$0.03
Output tokens$0.14
Best providerAWS Bedrock
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok 4 Fast accepts 2,000,000 input tokens compared to Nova Micro's 128,000 tokens. Nova Micro can generate longer responses up to 128,000 tokens, while Grok 4 Fast is limited to 30,000 tokens.

xAI
Grok 4 Fast
Input2,000,000 tokens
Output30,000 tokens
Amazon
Nova Micro
Input128,000 tokens
Output128,000 tokens
Sat May 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

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

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

Grok 4 Fast

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 Fast

Proprietary

Closed source

Nova Micro

Proprietary

Closed source

Release Timeline

When each model was launched

Grok 4 Fast was released on 2025-08-28, while Nova Micro was released on 2024-11-20.

Grok 4 Fast is 9 months newer than Nova Micro.

Grok 4 Fast

Aug 28, 2025

8 months ago

9mo newer
Nova Micro

Nov 20, 2024

1.5 years ago

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

Provider Availability

Grok 4 Fast is available from xAI. Nova Micro is available from Bedrock.

Grok 4 Fast

xai logo
xAI
Input Price:Input: $0.20/1MOutput Price:Output: $0.50/1M

Nova Micro

bedrock logo
AWS Bedrock
Input Price:Input: $0.03/1MOutput Price:Output: $0.14/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

xAI
Larger context window (2,000,000 tokens)
Supports multimodal inputs
Higher GPQA score (85.7% vs 40.0%)
Amazon
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok 4 Fast
Amazon
Nova Micro

FAQ

Common questions about Grok 4 Fast vs Nova Micro.

Which is better, Grok 4 Fast or Nova Micro?

Grok 4 Fast significantly outperforms across most benchmarks. Grok 4 Fast 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.

How does Grok 4 Fast compare to Nova Micro in benchmarks?

Grok 4 Fast scores SimpleQA: 95.0%, HMMT 2025: 93.3%, AIME 2025: 92.0%, GPQA: 85.7%, LiveCodeBench: 80.0%. 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%.

Is Grok 4 Fast cheaper than Nova Micro?

Nova Micro is 6.7x cheaper for input tokens. Grok 4 Fast costs $0.20/M input and $0.50/M output via xai. Nova Micro costs $0.03/M input and $0.14/M output via bedrock.

What are the context window sizes for Grok 4 Fast and Nova Micro?

Grok 4 Fast supports 2.0M tokens and Nova Micro supports 128K 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 and Nova Micro?

Key differences include context window (2.0M vs 128K), input pricing ($0.20 vs $0.03/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok 4 Fast and Nova Micro?

Grok 4 Fast is developed by xAI and Nova Micro is developed by Amazon.