GPT-5.1 High vs Muse Spark 1.1: Specs & Benchmark Comparison
GPT-5.1 High is developed by OpenAI, while Muse Spark 1.1 comes from Meta. GPT-5.1 High was released in November 2025, and Muse Spark 1.1 followed 8 months later in July 2026.
We have 2 benchmark results for GPT-5.1 High and 11 benchmark results for Muse Spark 1.1, but they were measured on different benchmarks, so there is no like-for-like scoreboard.
Muse Spark 1.1 is the cheaper API at $1.25 per million input tokens and $4.25 per million output tokens, about 60% below GPT-5.1 High at $2 and $8. Muse Spark 1.1 takes the larger context window at 1M tokens, compared with 256K for GPT-5.1 High. Both accept text and images as input.
| Characteristic | GPT-5.1 High | Muse Spark 1.1 |
|---|---|---|
| Company | OpenAI | Meta |
| Release Date | November 11, 2025 | July 9, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 256K | 1.0M |
| Context (output) | 128K | 131K |
| Input Price / 1M | $2.00 | $1.25 |
| Output Price / 1M | $8.00 | $4.25 |
| Average Score | 94.0% | 70.7% |
Verdict
Muse Spark 1.1 leads in 3 out of 4 comparison categories.
Both models show comparable average scores: GPT-5.1 High — 0.9, Muse Spark 1.1 — 0.7.
Muse Spark 1.1 is 1.8x cheaper: input $1.25/1M vs $2.00/1M tokens.
Muse Spark 1.1 supports a larger context: 1M vs 256K tokens.
Muse Spark 1.1 is newer: released 7/9/2026 vs 11/11/2025.
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Frequently Asked Questions
Which is better for coding — GPT-5.1 High or Muse Spark 1.1?
Which model is cheaper — GPT-5.1 High or Muse Spark 1.1?
Which has a larger context window — GPT-5.1 High or Muse Spark 1.1?
The GPT-5.1 High 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-5.1 High or Muse Spark 1.1 page. See also the complete list of AI model comparisons.