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Atria Dawn Preview vs Llama 3.1 405B Instruct

Atria Dawn Preview leads the LLM Stats Score 52.3 to 14.7.

Shanghai AI Laboratory · Meta · Updated for 2026

Which is better?

Atria Dawn Preview leads the overall LLM Stats Score 52.3 to 14.7, 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

Choose Llama 3.1 405B Instruct

  • you want predictable pricing at $0.89/M input and $0.89/M output

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
Llama 3.1 405B Instruct
Meta
Core performance indexes
LLM Stats Score
52.3
#10
14.7
#233
Reasoning
50.5
#12
13.8
#233
Coding
36.2
#22
11.5
#154
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$0.89 / M
Output price
— / M
$0.89 / M
Context window
—
128,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Atria Dawn Preview
Llama 3.1 405B Instruct
Tool use
31.1#12
30.8#15
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

12 reported for Atria Dawn Preview · 18 for Llama 3.1 405B Instruct

No common benchmarks found

Atria Dawn Preview and Llama 3.1 405B Instructdon'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

Model Size

Parameter count comparison

339.0B diff

Atria Dawn Preview has 339.0B more parameters than Llama 3.1 405B Instruct, making it 83.7% larger.

Shanghai AI Laboratory
Atria Dawn Preview
744.0Bparameters
Meta
Llama 3.1 405B Instruct
405.0Bparameters
744.0B
Atria Dawn Preview
405.0B
Llama 3.1 405B Instruct

Context Window

Maximum input and output token capacity

Only Llama 3.1 405B Instruct specifies input context (128,000 tokens). Only Llama 3.1 405B Instruct specifies output context (128,000 tokens).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
Meta
Llama 3.1 405B Instruct
Input128,000 tokens
Output128,000 tokens
Wed Sep 16 2026 • llm-stats.com

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while Llama 3.1 405B Instruct uses Llama 3.1 Community License.

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

Atria Dawn Preview

MIT

Open weights

Llama 3.1 405B Instruct

Llama 3.1 Community License

Open weights

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while Llama 3.1 405B Instruct was released on 2024-07-23.

Atria Dawn Preview is 26 months newer than Llama 3.1 405B Instruct.

Atria Dawn Preview

Sep 11, 2026

5 days ago

2.1yr newer
Llama 3.1 405B Instruct

Jul 23, 2024

2.2 years ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Atria Dawn Preview and Llama 3.1 405B Instruct side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
Llama 3.1 405B Instruct
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs Llama 3.1 405B Instruct.

Which is better, Atria Dawn Preview or Llama 3.1 405B Instruct?

Atria Dawn Preview leads the LLM Stats Score 52.3 to 14.7. Atria Dawn Preview is made by Shanghai AI Laboratory and Llama 3.1 405B Instruct is made by Meta. 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 Llama 3.1 405B Instruct in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. Llama 3.1 405B Instruct scores ARC-C: 96.9%, GSM8k: 96.8%, API-Bank: 92.0%, Multilingual MGSM (CoT): 91.6%, HumanEval: 89.0%.

What are the context window sizes for Atria Dawn Preview and Llama 3.1 405B Instruct?

Atria Dawn Preview supports an unknown number of tokens and Llama 3.1 405B Instruct 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 Llama 3.1 405B Instruct?

Key differences include LLM Stats Score (52.3 vs 14.7), licensing (MIT vs Llama 3.1 Community License). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and Llama 3.1 405B Instruct?

Atria Dawn Preview is developed by Shanghai AI Laboratory and Llama 3.1 405B Instruct is developed by Meta.

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