GPT-5.1 Codex High vs Muse Spark 1.1: Specs & Benchmark Comparison
| Characteristic | GPT-5.1 Codex High | Muse Spark 1.1 |
|---|---|---|
| Company | OpenAI | Meta |
| Release Date | November 11, 2025 | July 9, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 400K | 1.0M |
| Context (output) | 128K | 131K |
| Input Price / 1M | $1.25 | $1.25 |
| Output Price / 1M | $10.00 | $4.25 |
| Average Score | 1.0 | 0.8 |
Verdict
Muse Spark 1.1 leads in 3 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.1 Codex High — 1.0, Muse Spark 1.1 — 0.8.
API Cost
Muse Spark 1.1 is 2.0x cheaper: input $1.25/1M vs $1.25/1M tokens.
Context Window
Muse Spark 1.1 supports a larger context: 1M vs 400K tokens.
Recency
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 Codex High or Muse Spark 1.1?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — GPT-5.1 Codex High or Muse Spark 1.1?
GPT-5.1 Codex High is cheaper for input: $1.25 per 1M tokens vs $1.25.
Which has a larger context window — GPT-5.1 Codex High or Muse Spark 1.1?
Muse Spark 1.1 supports a larger context: 1,000,000 tokens vs 400,000.
The GPT-5.1 Codex 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 Codex High or Muse Spark 1.1 page. See also the complete list of AI model comparisons.