The AI arena is free today

Open Superagent

Atria Dawn Preview vs Laguna S 2.1

Atria Dawn Preview leads the LLM Stats Score 52.3 to 40.9.

Shanghai AI Laboratory · Poolside · Updated for 2026

Which is better?

Atria Dawn Preview leads the overall LLM Stats Score 52.3 to 40.9, ranking #10 overall.

In the 2 individual benchmarks reported for both models, Atria Dawn Preview wins 2; 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 agents — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 2 of 2 exact shared results
  • you want the most recent training data — it shipped Sep 2026

Choose Laguna S 2.1

  • you want predictable pricing at $0.10/M input and $0.20/M output

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
Laguna S 2.1
Poolside
Core performance indexes
LLM Stats Score
52.3
#10
40.9
#53
Reasoning
50.5
#12
40.4
#53
Coding
36.2
#22
31.0
#45
Agents
38.8
#10
24.6
#50
Cost, coverage & limits
Benchmark wins
2 of 2
0 of 2
Input price
— / M
$0.10 / M
Output price
— / M
$0.20 / M
Context window
—
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Atria Dawn Preview
Laguna S 2.1
Tool use
31.1#12
17.4#73
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

12 reported for Atria Dawn Preview · 6 for Laguna S 2.1

2 shared

Atria Dawn Preview outperforms in 2 benchmarks (SWE-Bench Pro, Terminal-Bench 2.1), while Laguna S 2.1 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

Model Size

Parameter count comparison

626.0B diff

Atria Dawn Preview has 626.0B more parameters than Laguna S 2.1, making it 530.5% larger.

Shanghai AI Laboratory
Atria Dawn Preview
744.0Bparameters
Poolside
Laguna S 2.1
118.0Bparameters
744.0B
Atria Dawn Preview
118.0B
Laguna S 2.1

Context Window

Maximum input and output token capacity

Only Laguna S 2.1 specifies input context (1,048,576 tokens).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
Poolside
Laguna S 2.1
Input1,048,576 tokens
Output- tokens
Sun Sep 20 2026 • llm-stats.com

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while Laguna S 2.1 uses OpenMDW License v1.1.

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

Atria Dawn Preview

MIT

Open weights

Laguna S 2.1

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while Laguna S 2.1 was released on 2026-07-21.

Atria Dawn Preview is 2 months newer than Laguna S 2.1.

Atria Dawn Preview

Sep 11, 2026

1 weeks ago

1mo newer
Laguna S 2.1

Jul 21, 2026

2 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 Laguna S 2.1 side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
Laguna S 2.1
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs Laguna S 2.1.

Which is better, Atria Dawn Preview or Laguna S 2.1?

Atria Dawn Preview leads the LLM Stats Score 52.3 to 40.9. Atria Dawn Preview is made by Shanghai AI Laboratory and Laguna S 2.1 is made by Poolside. 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 Laguna S 2.1 in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. Laguna S 2.1 scores SWE-bench Multilingual: 78.5%, Terminal-Bench 2.1: 70.2%, SWE-Bench Pro: 59.4%, Toolathlon: 49.7%, SWE Atlas - Codebase QnA: 46.2%.

What are the context window sizes for Atria Dawn Preview and Laguna S 2.1?

Atria Dawn Preview supports an unknown number of tokens and Laguna S 2.1 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 Laguna S 2.1?

Key differences include LLM Stats Score (52.3 vs 40.9), licensing (MIT vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and Laguna S 2.1?

Atria Dawn Preview is developed by Shanghai AI Laboratory and Laguna S 2.1 is developed by Poolside.

Related comparisons