Atria Dawn Preview vs Laguna S 2.1: Specs & Benchmark Comparison
Atria Dawn Preview is developed by Shanghai AI Laboratory, while Laguna S 2.1 comes from Poolside. Laguna S 2.1 was released in July 2026, and Atria Dawn Preview followed 2 months later in September 2026. Atria Dawn Preview is the larger model at roughly 744 billion parameters, against 118 billion for Laguna S 2.1.
The two models share 2 published benchmarks. Atria Dawn Preview leads on 2 of them. The widest gaps are on Terminal-Bench 2.1, where Atria Dawn Preview scores 78.3% against 70.2%; SWE-Bench Pro, where Atria Dawn Preview scores 59.6% against 59.4%. Averaged across everything we track, Atria Dawn Preview sits at 72.7% and Laguna S 2.1 at 57.4%.
Laguna S 2.1 is available through an API at $0.10 per million input tokens with a 1M-token context window. We do not track a hosted API for Atria Dawn Preview, so pricing and context cannot be compared directly.
| Characteristic | Atria Dawn Preview | Laguna S 2.1 |
|---|---|---|
| Company | Shanghai AI Laboratory | Poolside |
| Release Date | September 11, 2026 | July 21, 2026 |
| Parameters | 744B | 118B |
| Multimodal | No | No |
| Context (input) | — | 1.0M |
| Input Price / 1M | — | $0.10 |
| Output Price / 1M | — | $0.20 |
| Average Score | 72.7% | 57.4% |
| Benchmarks | ||
| Terminal-Bench 2.1 | 78.3% | 70.2% |
| SWE-Bench Pro | 59.6% | 59.4% |
Visual Benchmark Comparison
Verdict
Atria Dawn Preview leads in 1 out of 2 comparison categories.
Both models show comparable average scores: Atria Dawn Preview — 0.7, Laguna S 2.1 — 0.6.
Atria Dawn Preview is newer: released 9/11/2026 vs 7/21/2026.
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Frequently Asked Questions
Which is better for coding — Atria Dawn Preview or Laguna S 2.1?
Which model is cheaper — Atria Dawn Preview or Laguna S 2.1?
Which has a larger context window — Atria Dawn Preview or Laguna S 2.1?
The Atria Dawn Preview and Laguna S 2.1 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Atria Dawn Preview or Laguna S 2.1 page. See also the complete list of AI model comparisons.