Atria Dawn Preview vs Muse Spark 1.1: Specs & Benchmark Comparison
Atria Dawn Preview is developed by Shanghai AI Laboratory, while Muse Spark 1.1 comes from Meta. Muse Spark 1.1 was released in July 2026, and Atria Dawn Preview followed 2 months later in September 2026. Atria Dawn Preview has a published size of about 744 billion parameters; Meta has not disclosed the parameter count of Muse Spark 1.1.
The two models share 2 published benchmarks. Muse Spark 1.1 leads on 2 of them. The widest gaps are on SWE-Bench Pro, where Muse Spark 1.1 scores 61.5% against 59.6%; Terminal-Bench 2.1, where Muse Spark 1.1 scores 80.0% against 78.3%. Averaged across everything we track, Atria Dawn Preview sits at 72.7% and Muse Spark 1.1 at 70.7%.
Muse Spark 1.1 is available through an API at $1.25 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 | Muse Spark 1.1 |
|---|---|---|
| Company | Shanghai AI Laboratory | Meta |
| Release Date | September 11, 2026 | July 9, 2026 |
| Parameters | 744B | — |
| Multimodal | No | Yes |
| Context (input) | — | 1.0M |
| Context (output) | — | 131K |
| Input Price / 1M | — | $1.25 |
| Output Price / 1M | — | $4.25 |
| Average Score | 72.7% | 70.7% |
| Benchmarks | ||
| SWE-Bench Pro | 59.6% | 61.5% |
| Terminal-Bench 2.1 | 78.3% | 80.0% |
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, Muse Spark 1.1 — 0.7.
Atria Dawn Preview is newer: released 9/11/2026 vs 7/9/2026.
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Frequently Asked Questions
Which is better for coding — Atria Dawn Preview or Muse Spark 1.1?
Which model is cheaper — Atria Dawn Preview or Muse Spark 1.1?
Which has a larger context window — Atria Dawn Preview or Muse Spark 1.1?
The Atria Dawn Preview and Muse Spark 1.1 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 Muse Spark 1.1 page. See also the complete list of AI model comparisons.