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Atria Dawn Preview vs Seed 1.8

Atria Dawn Preview leads the LLM Stats Score 52.3 to 34.2.

Shanghai AI Laboratory · ByteDance · Updated for 2026

Which is better?

Atria Dawn Preview leads the overall LLM Stats Score 52.3 to 34.2, ranking #10 overall.

In the 3 individual benchmarks reported for both models, Atria Dawn Preview wins 3; this is a narrower head-to-head signal than the composite indexes.

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 value its reported benchmark strengths — it wins 3 of 3 exact shared results
  • you want the most recent training data — it shipped Sep 2026
  • you need open weights you can self-host or fine-tune

Choose Seed 1.8

  • you want predictable pricing at $0.25/M input and $2.00/M output

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
Seed 1.8
ByteDance
Core performance indexes
LLM Stats Score
52.3
#10
34.2
#93
Reasoning
50.5
#12
33.5
#96
Coding
36.2
#22
19.7
#100
Agents
38.8
#10
14.8
#88
Cost, coverage & limits
Benchmark wins
3 of 3
0 of 3
Input price
— / M
$0.25 / M
Output price
— / M
$2.00 / M
Context window
—
256,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Atria Dawn Preview
Seed 1.8
Tool use
31.1#12
6.6#144
Research
36.1#1
19.1#24
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

12 reported for Atria Dawn Preview · 57 for Seed 1.8

3 shared

Atria Dawn Preview outperforms in 3 benchmarks (BFCL-V4, BrowseComp, WideSearch), while Seed 1.8 is better at 0 benchmarks.

Atria Dawn Preview significantly outperforms across most benchmarks.

Sun Sep 20 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Seed 1.8 specifies input context (256,000 tokens). Only Seed 1.8 specifies output context (256,000 tokens).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
ByteDance
Seed 1.8
Input256,000 tokens
Output256,000 tokens
Sun Sep 20 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Seed 1.8 supports multimodal inputs, whereas Atria Dawn Preview does not.

Seed 1.8 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Atria Dawn Preview

Text
Images
Audio
Video

Seed 1.8

Text
Images
Audio
Video

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while Seed 1.8 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

Seed 1.8

Proprietary

Closed source

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while Seed 1.8 was released on 2026-02-17.

Atria Dawn Preview is 7 months newer than Seed 1.8.

Atria Dawn Preview

Sep 11, 2026

1 weeks ago

6mo newer
Seed 1.8

Feb 17, 2026

7 months 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 Seed 1.8 side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
Seed 1.8
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs Seed 1.8.

Which is better, Atria Dawn Preview or Seed 1.8?

Atria Dawn Preview leads the LLM Stats Score 52.3 to 34.2. Atria Dawn Preview is made by Shanghai AI Laboratory and Seed 1.8 is made by ByteDance. 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 Seed 1.8 in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. Seed 1.8 scores CountBench: 96.3%, AIME 2025: 94.3%, VLMsAreBlind: 93.0%, MMLU: 92.3%, AI2D: 89.1%.

What are the context window sizes for Atria Dawn Preview and Seed 1.8?

Atria Dawn Preview supports an unknown number of tokens and Seed 1.8 supports 256K 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 Seed 1.8?

Key differences include LLM Stats Score (52.3 vs 34.2), 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 Seed 1.8?

Atria Dawn Preview is developed by Shanghai AI Laboratory and Seed 1.8 is developed by ByteDance.

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