Muse Spark 1.2 vs Solar Pro 4: Specs & Benchmark Comparison
Muse Spark 1.2 is developed by Meta, while Solar Pro 4 comes from Upstage. Both were released in August 2026.
We have 3 benchmark results for Muse Spark 1.2 and 9 benchmark results for Solar Pro 4, but they overlap on a single test: Terminal-Bench 2.1, where Muse Spark 1.2 scores 83.0% 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 1.2 at $1.25 and $4.25. Muse Spark 1.2 takes the larger context window at 1M tokens, compared with 524K for Solar Pro 4. Muse Spark 1.2 accepts text and images as input, while Solar Pro 4 accepts text. On tooling, only Muse Spark 1.2 supports function calling and only Muse Spark 1.2 offers structured output.
| Characteristic | Muse Spark 1.2 | Solar Pro 4 |
|---|---|---|
| Company | Meta | Upstage |
| Release Date | August 5, 2026 | August 6, 2026 |
| Parameters | — | — |
| Multimodal | Yes | No |
| Context (input) | 1.0M | 524K |
| Context (output) | 131K | 131K |
| Input Price / 1M | $1.25 | $0.30 |
| Output Price / 1M | $4.25 | $1.20 |
| Average Score | 71.0% | 69.9% |
| Benchmarks | ||
| Terminal-Bench 2.1 | 83.0% | 57.0% |
Visual Benchmark Comparison
Verdict
Both models show equal results — the choice depends on your specific use case.
Both models show comparable average scores: Muse Spark 1.2 — 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 1.2 supports a larger context: 1M vs 524K tokens.
Both models were released around the same time: 8/5/2026 and 8/6/2026.
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Frequently Asked Questions
Which is better for coding — Muse Spark 1.2 or Solar Pro 4?
Which model is cheaper — Muse Spark 1.2 or Solar Pro 4?
Which has a larger context window — Muse Spark 1.2 or Solar Pro 4?
The Muse Spark 1.2 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 1.2 or Solar Pro 4 page. See also the complete list of AI model comparisons.