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Atria Dawn Preview vs Hermes 3 405B

Atria Dawn Preview leads the LLM Stats Score 52.3 to 4.3.

Shanghai AI Laboratory · Nous Research · Updated for 2026

Which is better?

Atria Dawn Preview leads the overall LLM Stats Score 52.3 to 4.3, 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 — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Hermes 3 405B

  • you want predictable pricing at $1.00/M input and $1.00/M output

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
Hermes 3 405B
Nous Research
Core performance indexes
LLM Stats Score
52.3
#10
4.3
#301
Reasoning
50.5
#12
3.7
#299
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$1.00 / M
Output price
— / M
$1.00 / M
Context window
—
131,072

Individual benchmarks

12 reported for Atria Dawn Preview · 13 for Hermes 3 405B

No common benchmarks found

Atria Dawn Preview and Hermes 3 405Bdon'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 Hermes 3 405B, making it 83.7% larger.

Shanghai AI Laboratory
Atria Dawn Preview
744.0Bparameters
Nous Research
Hermes 3 405B
405.0Bparameters
744.0B
Atria Dawn Preview
405.0B
Hermes 3 405B

Context Window

Maximum input and output token capacity

Only Hermes 3 405B specifies input context (131,072 tokens). Only Hermes 3 405B specifies output context (131,072 tokens).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
Nous Research
Hermes 3 405B
Input131,072 tokens
Output131,072 tokens
Fri Sep 18 2026 • llm-stats.com

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while Hermes 3 405B uses Apache 2.0.

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

Atria Dawn Preview

MIT

Open weights

Hermes 3 405B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while Hermes 3 405B was released on 2024-10-09.

Atria Dawn Preview is 23 months newer than Hermes 3 405B.

Atria Dawn Preview

Sep 11, 2026

1 weeks ago

1.9yr newer
Hermes 3 405B

Oct 9, 2024

1.9 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 Hermes 3 405B side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
Hermes 3 405B
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs Hermes 3 405B.

Which is better, Atria Dawn Preview or Hermes 3 405B?

Atria Dawn Preview leads the LLM Stats Score 52.3 to 4.3. Atria Dawn Preview is made by Shanghai AI Laboratory and Hermes 3 405B is made by Nous Research. 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 Hermes 3 405B in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. Hermes 3 405B scores HellaSwag: 90.2%, MT-Bench: 89.3%, BoolQ: 88.9%, Winogrande: 86.3%, ARC-E: 86.2%.

What are the context window sizes for Atria Dawn Preview and Hermes 3 405B?

Atria Dawn Preview supports an unknown number of tokens and Hermes 3 405B supports 131K 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 Hermes 3 405B?

Key differences include LLM Stats Score (52.3 vs 4.3), licensing (MIT vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and Hermes 3 405B?

Atria Dawn Preview is developed by Shanghai AI Laboratory and Hermes 3 405B is developed by Nous Research.

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