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Atria Dawn Preview vs GPT-5.3 Chat

Atria Dawn Preview leads the LLM Stats Score 52.3 to 29.6.

Shanghai AI Laboratory · OpenAI · Updated for 2026

Which is better?

Atria Dawn Preview leads the overall LLM Stats Score 52.3 to 29.6, ranking #10 overall.

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

Choose Atria Dawn Preview

  • overall performance matters — it scores 52.3 and ranks #10 on LLM Stats
  • you want the most recent training data — it shipped Sep 2026
  • you need open weights you can self-host or fine-tune

Choose GPT-5.3 Chat

  • you want predictable pricing at $1.75/M input and $14.00/M output

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
GPT-5.3 Chat
OpenAI
Core performance indexes
LLM Stats Score
52.3
#10
29.6
#127
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$1.75 / M
Output price
— / M
$14.00 / M
Context window
—
128,000

Individual benchmarks

12 reported for Atria Dawn Preview · 2 for GPT-5.3 Chat

No common benchmarks found

Atria Dawn Preview and GPT-5.3 Chatdon'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-5.3 Chat specifies input context (128,000 tokens). Only GPT-5.3 Chat specifies output context (16,384 tokens).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
OpenAI
GPT-5.3 Chat
Input128,000 tokens
Output16,384 tokens
Mon Sep 21 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-5.3 Chat supports multimodal inputs, whereas Atria Dawn Preview does not.

GPT-5.3 Chat 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-5.3 Chat

Text
Images
Audio
Video

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while GPT-5.3 Chat 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-5.3 Chat

Proprietary

Closed source

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while GPT-5.3 Chat was released on 2026-03-04.

Atria Dawn Preview is 6 months newer than GPT-5.3 Chat.

Atria Dawn Preview

Sep 11, 2026

1 weeks ago

6mo newer
GPT-5.3 Chat

Mar 4, 2026

6 months ago

Knowledge Cutoff

When training data ends

GPT-5.3 Chat has a documented knowledge cutoff of 2025-08-31, while Atria Dawn Preview's cutoff date is not specified.

We can confirm GPT-5.3 Chat's training data extends to 2025-08-31, but cannot make a direct comparison without Atria Dawn Preview's cutoff date.

Atria Dawn Preview

—

GPT-5.3 Chat

Aug 2025

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Atria Dawn Preview and GPT-5.3 Chat side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
GPT-5.3 Chat
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs GPT-5.3 Chat.

Which is better, Atria Dawn Preview or GPT-5.3 Chat?

Atria Dawn Preview leads the LLM Stats Score 52.3 to 29.6. Atria Dawn Preview is made by Shanghai AI Laboratory and GPT-5.3 Chat 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-5.3 Chat in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. GPT-5.3 Chat scores HealthBench: 54.1%, HealthBench Hard: 25.9%.

What are the context window sizes for Atria Dawn Preview and GPT-5.3 Chat?

Atria Dawn Preview supports an unknown number of tokens and GPT-5.3 Chat 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 Atria Dawn Preview and GPT-5.3 Chat?

Key differences include LLM Stats Score (52.3 vs 29.6), 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-5.3 Chat?

Atria Dawn Preview is developed by Shanghai AI Laboratory and GPT-5.3 Chat is developed by OpenAI.

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