Ember-1 vs Muse Spark 1.2: Specs & Benchmark Comparison
Ember-1 is developed by Fireworks AI, while Muse Spark 1.2 comes from Meta. Muse Spark 1.2 was released in August 2026, and Ember-1 followed a month later in September 2026. Ember-1 has a published size of about 2.8 trillion parameters; Meta has not disclosed the parameter count of Muse Spark 1.2.
The two models share 2 published benchmarks. They split them evenly, 1 to 1. The widest gaps are on DeepSWE 1.1, where Ember-1 scores 75.2% against 59.0%; Terminal-Bench 2.1, where Muse Spark 1.2 scores 83.0% against 82.0%. Averaged across everything we track, Ember-1 sits at 78.8% and Muse Spark 1.2 at 71.0%.
Muse Spark 1.2 is the cheaper API at $1.25 per million input tokens and $4.25 per million output tokens, roughly 2 times cheaper than Ember-1 at $3 and $15. Both accept a context window of about 1M tokens. Ember-1 accepts text as input, while Muse Spark 1.2 accepts text and images.
| Characteristic | Ember-1 | Muse Spark 1.2 |
|---|---|---|
| Company | Fireworks AI | Meta |
| Release Date | September 23, 2026 | August 5, 2026 |
| Parameters | 2.8T | — |
| Multimodal | No | Yes |
| Context (input) | 1.0M | 1.0M |
| Context (output) | — | 131K |
| Input Price / 1M | $3.00 | $1.25 |
| Output Price / 1M | $15.00 | $4.25 |
| Average Score | 78.8% | 71.0% |
| Benchmarks | ||
| DeepSWE 1.1 | 75.2% | 59.0% |
| Terminal-Bench 2.1 | 82.0% | 83.0% |
Visual Benchmark Comparison
Verdict
Muse Spark 1.2 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: Ember-1 — 0.8, Muse Spark 1.2 — 0.7.
Muse Spark 1.2 is 3.3x cheaper: input $1.25/1M vs $3.00/1M tokens.
Muse Spark 1.2 supports a larger context: 1M vs 1M tokens.
Ember-1 is newer: released 9/23/2026 vs 8/5/2026.
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Frequently Asked Questions
Which is better for coding — Ember-1 or Muse Spark 1.2?
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Which has a larger context window — Ember-1 or Muse Spark 1.2?
The Ember-1 and Muse Spark 1.2 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Ember-1 or Muse Spark 1.2 page. See also the complete list of AI model comparisons.