Hy4 preview vs Muse Spark 1.3: Specs & Benchmark Comparison
Hy4 preview is developed by Tencent, while Muse Spark 1.3 comes from Meta. Hy4 preview was released in August 2026, and Muse Spark 1.3 followed a month later in September 2026. Hy4 preview has a published size of about 770 billion parameters; Meta has not disclosed the parameter count of Muse Spark 1.3.
The two models share 4 published benchmarks. Muse Spark 1.3 leads on 4 of them. The widest gaps are on AutomationBench, where Muse Spark 1.3 scores 49.4% against 32.1%; Terminal-Bench 2.1, where Muse Spark 1.3 scores 88.8% against 85.4%. Averaged across everything we track, Hy4 preview sits at 58.7% and Muse Spark 1.3 at 73.4%.
Muse Spark 1.3 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 Hy4 preview, so pricing and context cannot be compared directly.
| Characteristic | Hy4 preview | Muse Spark 1.3 |
|---|---|---|
| Company | Tencent | Meta |
| Release Date | August 28, 2026 | September 2, 2026 |
| Parameters | 770B | — |
| Multimodal | No | Yes |
| Context (input) | — | 1.0M |
| Context (output) | — | 944K |
| Input Price / 1M | — | $1.25 |
| Output Price / 1M | — | $4.25 |
| Average Score | 58.7% | 73.4% |
| Benchmarks | ||
| AutomationBench | 32.1% | 49.4% |
| Terminal-Bench 2.1 | 85.4% | 88.8% |
| Job Bench | 61.7% | 64.9% |
| GDPval-AA | 55.9% | 58.5% |
Visual Benchmark Comparison
Verdict
Both models show equal results — the choice depends on your specific use case.
Both models show comparable average scores: Hy4 preview — 0.6, Muse Spark 1.3 — 0.7.
Both models were released around the same time: 8/28/2026 and 9/2/2026.
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Frequently Asked Questions
Which is better for coding — Hy4 preview or Muse Spark 1.3?
Which model is cheaper — Hy4 preview or Muse Spark 1.3?
Which has a larger context window — Hy4 preview or Muse Spark 1.3?
The Hy4 preview and Muse Spark 1.3 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Hy4 preview or Muse Spark 1.3 page. See also the complete list of AI model comparisons.