Model Comparison

Grok 4.5 vs Nova MicroWhich is better in 2026?

Grok 4.5 significantly outperforms across most benchmarks. Nova Micro is 52.2x cheaper per token.

Verdict: Grok 4.5 vs Nova Micro — which is better?

Grok 4.5 (by xAI) and Nova Micro (by Amazon) 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.

Grok 4.5 outperforms in 1 benchmarks (GPQA), while Nova Micro is better at 0 benchmarks. Grok 4.5 significantly outperforms across most benchmarks.

On price, Nova Micro is roughly 52.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Grok 4.5 also accepts a larger context window (500,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Grok 4.5 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you process long inputs — it offers a 500,000 token context window
  • you want the most recent training data — it shipped Jul 2026

Choose Nova Micro if…

  • cost matters — it's about 52.2x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Grok 4.5 outperforms in 1 benchmarks (GPQA), while Nova Micro is better at 0 benchmarks.

Grok 4.5 significantly outperforms across most benchmarks.

Sat Jul 18 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Nova Micro costs less

For input processing, Grok 4.5 ($2.00/1M tokens) is 66.7x more expensive than Nova Micro ($0.03/1M tokens).

For output processing, Grok 4.5 ($6.00/1M tokens) is 42.9x more expensive than Nova Micro ($0.14/1M tokens).

In conclusion, Grok 4.5 is more expensive than Nova Micro.*

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

Lowest available price from all providers
Sat Jul 18 2026 • llm-stats.com
xAI
Grok 4.5
Input tokens$2.00
Output tokens$6.00
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 4.5 accepts 500,000 input tokens compared to Nova Micro's 128,000 tokens. Only Nova Micro specifies output context (128,000 tokens).

xAI
Grok 4.5
Input500,000 tokens
Output- tokens
Amazon
Nova Micro
Input128,000 tokens
Output128,000 tokens
Sat Jul 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok 4.5 supports multimodal inputs, whereas Nova Micro does not.

Grok 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok 4.5

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 4.5

Proprietary

Closed source

Nova Micro

Proprietary

Closed source

Release Timeline

When each model was launched

Grok 4.5 was released on 2026-07-16, while Nova Micro was released on 2024-11-20.

Grok 4.5 is 20 months newer than Nova Micro.

Grok 4.5

Jul 16, 2026

2 days ago

1.7yr newer
Nova Micro

Nov 20, 2024

1.7 years ago

Knowledge Cutoff

When training data ends

Grok 4.5 has a documented knowledge cutoff of 2026-02-01, while Nova Micro's cutoff date is not specified.

We can confirm Grok 4.5's training data extends to 2026-02-01, but cannot make a direct comparison without Nova Micro's cutoff date.

Grok 4.5

Feb 2026

Nova Micro

—

Provider Availability

Grok 4.5 is available from xAI. Nova Micro is available from Bedrock.

Grok 4.5

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $6.00/1M

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 (500,000 tokens)
Supports multimodal inputs
Higher GPQA score (93.0% vs 40.0%)
Amazon
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok 4.5 and Nova Micro side-by-side, then vote on the output you prefer.

Grok 4.5
✓ Preferred
Nova Micro
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok 4.5
Amazon
Nova Micro

FAQ

Common questions about Grok 4.5 vs Nova Micro.

Which is better, Grok 4.5 or Nova Micro?

Grok 4.5 significantly outperforms across most benchmarks. Grok 4.5 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 4.5 compare to Nova Micro in benchmarks?

Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, Artificial Analysis Coding Agent Index v1.1: 76.0%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%. 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 4.5 cheaper than Nova Micro?

Nova Micro is 66.7x cheaper for input tokens. Grok 4.5 costs $2.00/M input and $6.00/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 4.5 and Nova Micro?

Grok 4.5 supports 500K 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 4.5 and Nova Micro?

Key differences include context window (500K vs 128K), input pricing ($2.00 vs $0.03/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok 4.5 and Nova Micro?

Grok 4.5 is developed by xAI and Nova Micro is developed by Amazon.

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