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Atria Dawn Preview vs GPT-6 Luna

Atria Dawn Preview and GPT-6 Luna are closely matched at 51.6 and 44.5 on the LLM Stats Score.

Shanghai AI Laboratory · OpenAI · Updated for 2026

Which is better?

Atria Dawn Preview and GPT-6 Luna are closely matched on the overall LLM Stats Score at 51.6 and 44.5.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Atria Dawn Preview

  • you need open weights you can self-host or fine-tune

Choose GPT-6 Luna

  • you want the most recent training data — it shipped Sep 2026

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
GPT-6 Luna
OpenAI
Core performance indexes
LLM Stats Score
51.6
#11
44.5
#41
Reasoning
49.9
#13
40.0
#58
Coding
35.2
#31
31.4
#47
Agents
37.8
#11
31.8
#30
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$0.10 / M
Output price
— / M
$0.50 / M
Context window
—
1,050,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Atria Dawn Preview
GPT-6 Luna
Tool use
28.0#18
22.1#47
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

12 reported for Atria Dawn Preview · 5 for GPT-6 Luna

No common benchmarks found

Atria Dawn Preview and GPT-6 Lunadon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only GPT-6 Luna specifies input context (1,050,000 tokens). Only GPT-6 Luna specifies output context (128,000 tokens).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
OpenAI
GPT-6 Luna
Input1,050,000 tokens
Output128,000 tokens
Wed Sep 23 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-6 Luna supports multimodal inputs, whereas Atria Dawn Preview does not.

GPT-6 Luna can handle both text and other forms of data like images, making it suitable for multimodal applications.

Atria Dawn Preview

Text
Images
Audio
Video

GPT-6 Luna

Text
Images
Audio
Video

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while GPT-6 Luna uses a proprietary license.

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

Atria Dawn Preview

MIT

Open weights

GPT-6 Luna

Proprietary

Closed source

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while GPT-6 Luna was released on 2026-09-22.

GPT-6 Luna is 0 month newer than Atria Dawn Preview.

Atria Dawn Preview

Sep 11, 2026

1 weeks ago

GPT-6 Luna

Sep 22, 2026

0 days ago

1w newer

Knowledge Cutoff

When training data ends

GPT-6 Luna has a documented knowledge cutoff of 2026-05-18, while Atria Dawn Preview's cutoff date is not specified.

We can confirm GPT-6 Luna's training data extends to 2026-05-18, but cannot make a direct comparison without Atria Dawn Preview's cutoff date.

Atria Dawn Preview

—

GPT-6 Luna

May 2026

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Atria Dawn Preview and GPT-6 Luna side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
GPT-6 Luna
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs GPT-6 Luna.

Which is better, Atria Dawn Preview or GPT-6 Luna?

Atria Dawn Preview and GPT-6 Luna are closely matched on the LLM Stats Score at 51.6 and 44.5. Atria Dawn Preview is made by Shanghai AI Laboratory and GPT-6 Luna is made by OpenAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Atria Dawn Preview compare to GPT-6 Luna in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. GPT-6 Luna scores DeepSWE 1.1: 66.6%, OSWorld 2.0: 52.7%, Agents' Last Exam: 50.9%, FrontierCode 1.1: 42.4%, AutomationBench v1.0.6: 20.7%.

What are the context window sizes for Atria Dawn Preview and GPT-6 Luna?

Atria Dawn Preview supports an unknown number of tokens and GPT-6 Luna supports 1.1M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Atria Dawn Preview and GPT-6 Luna?

Key differences include LLM Stats Score (51.6 vs 44.5), multimodal support (no vs yes), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and GPT-6 Luna?

Atria Dawn Preview is developed by Shanghai AI Laboratory and GPT-6 Luna is developed by OpenAI.

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