Model Comparison

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

Comparing GPT-5.6 Luna and Nova 2 Sonic across benchmarks, pricing, and capabilities.

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

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

On price, Nova 2 Sonic is roughly 2.4x 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 process long inputs — it offers a 1,050,000 token context window
  • you want the most recent training data — it shipped Jul 2026

Choose Nova 2 Sonic if…

  • cost matters — it's about 2.4x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.6 Luna and Nova 2 Sonicdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Nova 2 Sonic costs less

For input processing, GPT-5.6 Luna ($1.00/1M tokens) is 3.0x more expensive than Nova 2 Sonic ($0.33/1M tokens).

For output processing, GPT-5.6 Luna ($6.00/1M tokens) is 2.2x more expensive than Nova 2 Sonic ($2.75/1M tokens).

In conclusion, GPT-5.6 Luna is more expensive than Nova 2 Sonic.*

* 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
Amazon
Nova 2 Sonic
Input tokens$0.33
Output tokens$2.75
Best providerAWS Bedrock
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 Nova 2 Sonic's 1,000,000 tokens. GPT-5.6 Luna can generate longer responses up to 128,000 tokens, while Nova 2 Sonic is limited to 65,536 tokens.

OpenAI
GPT-5.6 Luna
Input1,050,000 tokens
Output128,000 tokens
Amazon
Nova 2 Sonic
Input1,000,000 tokens
Output65,536 tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.6 Luna and Nova 2 Sonic 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 Sonic

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 Sonic

Proprietary

Closed source

Release Timeline

When each model was launched

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

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

GPT-5.6 Luna

Jul 9, 2026

1 weeks ago

7mo newer
Nova 2 Sonic

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 Sonic'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 Sonic's cutoff date.

GPT-5.6 Luna

Feb 2026

Nova 2 Sonic

—

Provider Availability

GPT-5.6 Luna is available from OpenAI. Nova 2 Sonic is available from Bedrock.

GPT-5.6 Luna

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

Nova 2 Sonic

bedrock logo
AWS Bedrock
Input Price:Input: $0.33/1MOutput Price:Output: $2.75/1M
* 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)
Amazon
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

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

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

FAQ

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

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

GPT-5.6 Luna (OpenAI) and Nova 2 Sonic (Amazon) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT-5.6 Luna compare to Nova 2 Sonic 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 Sonic scores Big Bench Audio: 87.0%, BFCL: 74.5%, ComplexFuncBench: 65.2%, IFBench: 37.5%.

Is GPT-5.6 Luna cheaper than Nova 2 Sonic?

Nova 2 Sonic is 3.0x cheaper for input tokens. GPT-5.6 Luna costs $1.00/M input and $6.00/M output via openai. Nova 2 Sonic costs $0.33/M input and $2.75/M output via bedrock.

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

GPT-5.6 Luna supports 1.1M tokens and Nova 2 Sonic supports 1.0M 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 Nova 2 Sonic?

Key differences include context window (1.1M vs 1.0M), input pricing ($1.00 vs $0.33/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.6 Luna and Nova 2 Sonic?

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

Related comparisons