Model Comparison

GPT-5.6 Luna vs Nova 2 OmniWhich is better in 2026?

GPT-5.6 Luna significantly outperforms across most benchmarks.

Verdict: GPT-5.6 Luna vs Nova 2 Omni — which is better?

GPT-5.6 Luna (by OpenAI) and Nova 2 Omni (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.

GPT-5.6 Luna outperforms in 1 benchmarks (MMMU-Pro), while Nova 2 Omni is better at 0 benchmarks. GPT-5.6 Luna significantly outperforms across most benchmarks.

Choose GPT-5.6 Luna if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Choose Nova 2 Omni if…

  • you are already invested in the Amazon ecosystem

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

GPT-5.6 Luna outperforms in 1 benchmarks (MMMU-Pro), while Nova 2 Omni is better at 0 benchmarks.

GPT-5.6 Luna significantly outperforms across most benchmarks.

Tue Jul 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-5.6 Luna specifies input context (1,050,000 tokens). Only GPT-5.6 Luna specifies output context (128,000 tokens).

OpenAI
GPT-5.6 Luna
Input1,050,000 tokens
Output128,000 tokens
Amazon
Nova 2 Omni
Input- tokens
Output- tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.6 Luna and Nova 2 Omni support multimodal inputs.

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

GPT-5.6 Luna

Text
Images
Audio
Video

Nova 2 Omni

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.

GPT-5.6 Luna

Proprietary

Closed source

Nova 2 Omni

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.6 Luna was released on 2026-07-09, while Nova 2 Omni was released on 2025-12-02.

GPT-5.6 Luna is 7 months newer than Nova 2 Omni.

GPT-5.6 Luna

Jul 9, 2026

1 weeks ago

7mo newer
Nova 2 Omni

Dec 2, 2025

7 months ago

Knowledge Cutoff

When training data ends

GPT-5.6 Luna has a documented knowledge cutoff of 2026-02-16, while Nova 2 Omni's cutoff date is not specified.

We can confirm GPT-5.6 Luna's training data extends to 2026-02-16, but cannot make a direct comparison without Nova 2 Omni's cutoff date.

GPT-5.6 Luna

Feb 2026

Nova 2 Omni

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Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (1,050,000 tokens)
Higher MMMU-Pro score (78.4% vs 61.4%)
Amazon

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

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5.6 Luna and Nova 2 Omni side-by-side, then vote on the output you prefer.

GPT-5.6 Luna
✓ Preferred
Nova 2 Omni
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5.6 Luna
Amazon
Nova 2 Omni

FAQ

Common questions about GPT-5.6 Luna vs Nova 2 Omni.

Which is better, GPT-5.6 Luna or Nova 2 Omni?

GPT-5.6 Luna significantly outperforms across most benchmarks. GPT-5.6 Luna is made by OpenAI and Nova 2 Omni is made by Amazon. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5.6 Luna compare to Nova 2 Omni in benchmarks?

GPT-5.6 Luna scores Connectors: 99.9%, HealthBench Consensus: 95.1%, GPQA: 92.3%, Search and Function-Calling: 89.7%, Capture-the-Flag Challenges (Internal): 85.2%. Nova 2 Omni scores AIME 2025: 92.1%, RefCOCOg: 86.3%, ScreenSpot: 85.4%, MMLU-Pro: 80.7%, Tau2 Telecom: 80.0%.

What are the context window sizes for GPT-5.6 Luna and Nova 2 Omni?

GPT-5.6 Luna supports 1.1M tokens and Nova 2 Omni supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes GPT-5.6 Luna and Nova 2 Omni?

GPT-5.6 Luna is developed by OpenAI and Nova 2 Omni is developed by Amazon.

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