GPT-5.2 vs Muse Spark 1.1: Specs & Benchmark Comparison
GPT-5.2 is developed by OpenAI, while Muse Spark 1.1 comes from Meta. GPT-5.2 was released in December 2025, and Muse Spark 1.1 followed 7 months later in July 2026.
The two models share 4 published benchmarks. Muse Spark 1.1 leads on 4 of them. The widest gaps are on Toolathlon, where Muse Spark 1.1 scores 75.6% against 46.3%; Humanity's Last Exam, where Muse Spark 1.1 scores 62.1% against 34.5%. Averaged across everything we track, GPT-5.2 sits at 78.2% and Muse Spark 1.1 at 70.7%.
Muse Spark 1.1 is the cheaper API at $1.25 per million input tokens and $4.25 per million output tokens, about 20% below GPT-5.2 at $1.50 and $6. Muse Spark 1.1 takes the larger context window at 1M tokens, compared with 256K for GPT-5.2. GPT-5.2 accepts text, images, audio, and video as input, while Muse Spark 1.1 accepts text and images.
| Characteristic | GPT-5.2 | Muse Spark 1.1 |
|---|---|---|
| Company | OpenAI | Meta |
| Release Date | December 10, 2025 | July 9, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 256K | 1.0M |
| Context (output) | 128K | 131K |
| Input Price / 1M | $1.50 | $1.25 |
| Output Price / 1M | $6.00 | $4.25 |
| Average Score | 78.2% | 70.7% |
| Benchmarks | ||
| Toolathlon | 46.3% | 75.6% |
| Humanity's Last Exam | 34.5% | 62.1% |
| MCP Atlas | 60.6% | 88.0% |
| CharXiv-R | 82.1% | 88.0% |
Visual Benchmark Comparison
Verdict
Muse Spark 1.1 leads in 3 out of 4 comparison categories.
Both models show comparable average scores: GPT-5.2 — 0.8, Muse Spark 1.1 — 0.7.
Muse Spark 1.1 is 1.4x cheaper: input $1.25/1M vs $1.50/1M tokens.
Muse Spark 1.1 supports a larger context: 1M vs 256K tokens.
Muse Spark 1.1 is newer: released 7/9/2026 vs 12/10/2025.
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Frequently Asked Questions
Which is better for coding — GPT-5.2 or Muse Spark 1.1?
Which model is cheaper — GPT-5.2 or Muse Spark 1.1?
Which has a larger context window — GPT-5.2 or Muse Spark 1.1?
The GPT-5.2 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 GPT-5.2 or Muse Spark 1.1 page. See also the complete list of AI model comparisons.