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Atria Dawn Preview vs GPT-5 Codex

Atria Dawn Preview leads the LLM Stats Score 52.3 to 26.6.

Shanghai AI Laboratory · OpenAI · Updated for 2026

Which is better?

Atria Dawn Preview leads the overall LLM Stats Score 52.3 to 26.6, 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
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • 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 Codex

  • you are already invested in the OpenAI ecosystem

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
GPT-5 Codex
OpenAI
Core performance indexes
LLM Stats Score
52.3
#10
26.6
#149
Reasoning
50.5
#12
26.5
#147
Coding
36.2
#22
19.3
#107
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
— / M
Output price
— / M
— / M
Context window
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Individual benchmarks

12 reported for Atria Dawn Preview · 1 for GPT-5 Codex

No common benchmarks found

Atria Dawn Preview and GPT-5 Codexdon'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

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while GPT-5 Codex 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 Codex

Proprietary

Closed source

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while GPT-5 Codex was released on 2025-09-15.

Atria Dawn Preview is 12 months newer than GPT-5 Codex.

Atria Dawn Preview

Sep 11, 2026

1 weeks ago

12mo newer
GPT-5 Codex

Sep 15, 2025

1.0 years ago

Knowledge Cutoff

When training data ends

GPT-5 Codex has a documented knowledge cutoff of 2024-09-30, while Atria Dawn Preview's cutoff date is not specified.

We can confirm GPT-5 Codex's training data extends to 2024-09-30, but cannot make a direct comparison without Atria Dawn Preview's cutoff date.

Atria Dawn Preview

—

GPT-5 Codex

Sep 2024

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 Codex side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
GPT-5 Codex
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs GPT-5 Codex.

Which is better, Atria Dawn Preview or GPT-5 Codex?

Atria Dawn Preview leads the LLM Stats Score 52.3 to 26.6. Atria Dawn Preview is made by Shanghai AI Laboratory and GPT-5 Codex 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 Codex 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 Codex scores SWE-Bench Verified: 74.5%.

What are the main differences between Atria Dawn Preview and GPT-5 Codex?

Key differences include LLM Stats Score (52.3 vs 26.6), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and GPT-5 Codex?

Atria Dawn Preview is developed by Shanghai AI Laboratory and GPT-5 Codex is developed by OpenAI.

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