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Atria Dawn Preview vs Ember-1

Atria Dawn Preview and Ember-1 are closely matched at 50.8 and 43.6 on the LLM Stats Score.

Shanghai AI Laboratory · Fireworks AI · Updated for 2026

Which is better?

Atria Dawn Preview and Ember-1 are closely matched on the overall LLM Stats Score at 50.8 and 43.6.

In the 1 individual benchmarks reported for both models, Ember-1 wins 1; 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

  • your work emphasizes reasoning — it leads those capability indexes
  • you need open weights you can self-host or fine-tune

Choose Ember-1

  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Sep 2026

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
Ember-1
Fireworks AI
Core performance indexes
LLM Stats Score
50.8
#16
43.6
#46
Reasoning
49.5
#16
38.6
#70
Coding
34.3
#37
38.0
#20
Agents
36.9
#15
31.2
#35
Cost, coverage & limits
Benchmark wins
0 of 1
1 of 1
Input price
— / M
$3.00 / M
Output price
— / M
$15.00 / M
Context window
—
1,040,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Atria Dawn Preview
Ember-1
Tool use
28.1#20
15.9#93
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

12 reported for Atria Dawn Preview · 4 for Ember-1

1 shared

Atria Dawn Preview outperforms in 0 benchmarks, while Ember-1 is better at 1 benchmark (Terminal-Bench 2.1).

Ember-1 significantly outperforms across most benchmarks.

Wed Oct 07 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

2036.0B diff

Ember-1 has 2036.0B more parameters than Atria Dawn Preview, making it 273.7% larger.

Shanghai AI Laboratory
Atria Dawn Preview
744.0Bparameters
Fireworks AI
Ember-1
2.8Tparameters
744.0B
Atria Dawn Preview
2780.0B
Ember-1

Context Window

Maximum input and output token capacity

Only Ember-1 specifies input context (1,040,000 tokens).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
Fireworks AI
Ember-1
Input1,040,000 tokens
Output- tokens
Wed Oct 07 2026 • llm-stats.com

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while Ember-1 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

Ember-1

Proprietary

Closed source

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while Ember-1 was released on 2026-09-23.

Ember-1 is 0 month newer than Atria Dawn Preview.

Atria Dawn Preview

Sep 11, 2026

3 weeks ago

Ember-1

Sep 23, 2026

2 weeks ago

1w newer

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?

Judge for yourself.

Run your own prompts against Atria Dawn Preview and Ember-1 side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
Ember-1
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs Ember-1.

Which is better, Atria Dawn Preview or Ember-1?

Atria Dawn Preview and Ember-1 are closely matched on the LLM Stats Score at 50.8 and 43.6. Atria Dawn Preview is made by Shanghai AI Laboratory and Ember-1 is made by Fireworks AI. 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 Ember-1 in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. Ember-1 scores SWE-Bench Verified: 92.2%, Terminal-Bench 2.1: 82.0%, DeepSWE 1.1: 75.2%, Tau2 Airline: 66.0%.

What are the context window sizes for Atria Dawn Preview and Ember-1?

Atria Dawn Preview supports an unknown number of tokens and Ember-1 supports 1.0M 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 Ember-1?

Key differences include LLM Stats Score (50.8 vs 43.6), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and Ember-1?

Atria Dawn Preview is developed by Shanghai AI Laboratory and Ember-1 is developed by Fireworks AI.

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