Model Comparison

GPT-5.6 Luna vs Nemotron 3 Super (120B A12B)Which is better in 2026?

GPT-5.6 Luna significantly outperforms across most benchmarks. Nemotron 3 Super (120B A12B) is 11.3x cheaper per token.

Verdict: GPT-5.6 Luna vs Nemotron 3 Super (120B A12B) — which is better?

GPT-5.6 Luna (by OpenAI) and Nemotron 3 Super (120B A12B) (by NVIDIA) 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 2 benchmarks (BrowseComp, GPQA), while Nemotron 3 Super (120B A12B) is better at 0 benchmarks. GPT-5.6 Luna significantly outperforms across most benchmarks.

On price, Nemotron 3 Super (120B A12B) is roughly 11.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5.6 Luna also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-5.6 Luna if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you process long inputs — it offers a 1,050,000 token context window
  • you want the most recent training data — it shipped Jul 2026

Choose Nemotron 3 Super (120B A12B) if…

  • cost matters — it's about 11.3x cheaper per token
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT-5.6 Luna outperforms in 2 benchmarks (BrowseComp, GPQA), while Nemotron 3 Super (120B A12B) 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

Pricing Analysis

Price comparison per million tokens

Nemotron 3 Super (120B A12B) costs less

For input processing, GPT-5.6 Luna ($1.00/1M tokens) is 10.0x more expensive than Nemotron 3 Super (120B A12B) ($0.10/1M tokens).

For output processing, GPT-5.6 Luna ($6.00/1M tokens) is 12.0x more expensive than Nemotron 3 Super (120B A12B) ($0.50/1M tokens).

In conclusion, GPT-5.6 Luna is more expensive than Nemotron 3 Super (120B A12B).*

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

Lowest available price from all providers
Tue Jul 21 2026 • llm-stats.com
OpenAI
GPT-5.6 Luna
Input tokens$1.00
Output tokens$6.00
Best providerOpenAI
NVIDIA
Nemotron 3 Super (120B A12B)
Input tokens$0.10
Output tokens$0.50
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.6 Luna accepts 1,050,000 input tokens compared to Nemotron 3 Super (120B A12B)'s 262,144 tokens. Nemotron 3 Super (120B A12B) can generate longer responses up to 262,144 tokens, while GPT-5.6 Luna is limited to 128,000 tokens.

OpenAI
GPT-5.6 Luna
Input1,050,000 tokens
Output128,000 tokens
NVIDIA
Nemotron 3 Super (120B A12B)
Input262,144 tokens
Output262,144 tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.6 Luna supports multimodal inputs, whereas Nemotron 3 Super (120B A12B) does not.

GPT-5.6 Luna can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5.6 Luna

Text
Images
Audio
Video

Nemotron 3 Super (120B A12B)

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.6 Luna is licensed under a proprietary license, while Nemotron 3 Super (120B A12B) uses NVIDIA Open Model License Agreement .

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

GPT-5.6 Luna

Proprietary

Closed source

Nemotron 3 Super (120B A12B)

NVIDIA Open Model License Agreement

Open weights

Release Timeline

When each model was launched

GPT-5.6 Luna was released on 2026-07-09, while Nemotron 3 Super (120B A12B) was released on 2026-03-11.

GPT-5.6 Luna is 4 months newer than Nemotron 3 Super (120B A12B).

GPT-5.6 Luna

Jul 9, 2026

1 weeks ago

4mo newer
Nemotron 3 Super (120B A12B)

Mar 11, 2026

4 months ago

Knowledge Cutoff

When training data ends

GPT-5.6 Luna has a knowledge cutoff of 2026-02-16, while Nemotron 3 Super (120B A12B) has a cutoff of 2025-06-01.

GPT-5.6 Luna has more recent training data (up to 2026-02-16), making it potentially better informed about events through that date compared to Nemotron 3 Super (120B A12B) (2025-06-01).

GPT-5.6 Luna

Feb 2026

8 mo newer
Nemotron 3 Super (120B A12B)

Jun 2025

Provider Availability

GPT-5.6 Luna is available from OpenAI. Nemotron 3 Super (120B A12B) is available from DeepInfra.

GPT-5.6 Luna

openai logo
OpenAI
Input Price:Input: $1.00/1MOutput Price:Output: $6.00/1M

Nemotron 3 Super (120B A12B)

deepinfra logo
Deepinfra
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (1,050,000 tokens)
Supports multimodal inputs
Higher BrowseComp score (83.3% vs 31.3%)
Higher GPQA score (92.3% vs 82.7%)
NVIDIA
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5.6 Luna and Nemotron 3 Super (120B A12B) side-by-side, then vote on the output you prefer.

GPT-5.6 Luna
✓ Preferred
Nemotron 3 Super (120B A12B)
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5.6 Luna
NVIDIA
Nemotron 3 Super (120B A12B)

FAQ

Common questions about GPT-5.6 Luna vs Nemotron 3 Super (120B A12B).

Which is better, GPT-5.6 Luna or Nemotron 3 Super (120B A12B)?

GPT-5.6 Luna significantly outperforms across most benchmarks. GPT-5.6 Luna is made by OpenAI and Nemotron 3 Super (120B A12B) is made by NVIDIA. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5.6 Luna compare to Nemotron 3 Super (120B A12B) 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%. Nemotron 3 Super (120B A12B) scores HMMT 2025: 94.7%, RULER: 91.8%, AIME 2025: 90.2%, WMT24++: 86.7%, MMLU-Pro: 83.7%.

Is GPT-5.6 Luna cheaper than Nemotron 3 Super (120B A12B)?

Nemotron 3 Super (120B A12B) is 10.0x cheaper for input tokens. GPT-5.6 Luna costs $1.00/M input and $6.00/M output via openai. Nemotron 3 Super (120B A12B) costs $0.10/M input and $0.50/M output via deepinfra.

What are the context window sizes for GPT-5.6 Luna and Nemotron 3 Super (120B A12B)?

GPT-5.6 Luna supports 1.1M tokens and Nemotron 3 Super (120B A12B) supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-5.6 Luna and Nemotron 3 Super (120B A12B)?

Key differences include context window (1.1M vs 262K), input pricing ($1.00 vs $0.10/M), multimodal support (yes vs no), licensing (Proprietary vs NVIDIA Open Model License Agreement ). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.6 Luna and Nemotron 3 Super (120B A12B)?

GPT-5.6 Luna is developed by OpenAI and Nemotron 3 Super (120B A12B) is developed by NVIDIA.

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