Muse Spark 1.3 vs Solar Pro 4: Specs & Benchmark Comparison
Muse Spark 1.3 is developed by Meta, while Solar Pro 4 comes from Upstage. Solar Pro 4 was released in August 2026, and Muse Spark 1.3 followed a month later in September 2026.
We have 11 benchmark results for Muse Spark 1.3 and 9 benchmark results for Solar Pro 4, but they overlap on a single test: Terminal-Bench 2.1, where Muse Spark 1.3 scores 88.8% against 57.0%.
Solar Pro 4 is the cheaper API at $0.30 per million input tokens and $1.20 per million output tokens, roughly 4 times cheaper than Muse Spark 1.3 at $1.25 and $4.25. Muse Spark 1.3 takes the larger context window at 1M tokens, compared with 524K for Solar Pro 4. Muse Spark 1.3 accepts text, images, audio, and video as input, while Solar Pro 4 accepts text. On tooling, only Muse Spark 1.3 supports function calling and only Muse Spark 1.3 offers structured output.
| Characteristic | Muse Spark 1.3 | Solar Pro 4 |
|---|---|---|
| Company | Meta | Upstage |
| Release Date | September 2, 2026 | August 6, 2026 |
| Parameters | — | — |
| Multimodal | Yes | No |
| Context (input) | 1.0M | 524K |
| Context (output) | 944K | 131K |
| Input Price / 1M | $1.25 | $0.30 |
| Output Price / 1M | $4.25 | $1.20 |
| Average Score | 73.4% | 69.9% |
| Benchmarks | ||
| Terminal-Bench 2.1 | 88.8% | 57.0% |
Visual Benchmark Comparison
Verdict
Muse Spark 1.3 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: Muse Spark 1.3 — 0.7, Solar Pro 4 — 0.7.
Solar Pro 4 is 3.7x cheaper: input $0.30/1M vs $1.25/1M tokens.
Muse Spark 1.3 supports a larger context: 1M vs 524K tokens.
Muse Spark 1.3 is newer: released 9/2/2026 vs 8/6/2026.
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Frequently Asked Questions
Which is better for coding — Muse Spark 1.3 or Solar Pro 4?
Which model is cheaper — Muse Spark 1.3 or Solar Pro 4?
Which has a larger context window — Muse Spark 1.3 or Solar Pro 4?
The Muse Spark 1.3 and Solar Pro 4 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Muse Spark 1.3 or Solar Pro 4 page. See also the complete list of AI model comparisons.