Very long inputs
Choose Muse Spark 1.2
Muse Spark 1.2 reads up to 1.05M tokens per request, against 400k for GPT-5.6 Cyber.
GPT-5.6 Cyber vs Muse Spark 1.2: price, context and capabilities
Choose GPT-5.6 Cyber for images as input and the latest release. Choose Muse Spark 1.2 for very long inputs.
In short
- A price comparison is not possible: one of them has no comparable published price.
- Muse Spark 1.2 reads more per request: 1.05M tokens against 400k.
- Only GPT-5.6 Cyber offers vision, reasoning, structured output, batch api.
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Images as input
Choose GPT-5.6 Cyber
GPT-5.6 Cyber accepts images as input; Muse Spark 1.2 does not.
Latest release
Choose GPT-5.6 Cyber
GPT-5.6 Cyber is the newer release (Aug 7, 2026, against Aug 5, 2026 for Muse Spark 1.2).
Specifications side by side
| GPT-5.6 Cyber | Muse Spark 1.2 | |
|---|---|---|
| Provider | OpenAI | Meta |
| Category | Language models | Language models |
| Status | Generally available · Limited access | Legacy |
| Headline price | No data | No data |
| Input | No data | No data |
| Output | No data | No data |
| Cached input | No data | No data |
| Context window | 400k | 1.05M |
| Max output | 128k | No data |
| Released | Aug 7, 2026 | Aug 5, 2026 |
| Knowledge cutoff | February 2026 | No data |
| Licence | Proprietary | Proprietary |
| Capabilities | Vision, Reasoning, Tool calling, Structured output, Batch API | Tool calling |
| API model id | gpt-5.6-cyber | muse-spark-1.2 |
Benchmarks side by side
Leader in bold.
| Benchmark | GPT-5.6 Cyber | Muse Spark 1.2 |
|---|---|---|
| Intelligence Index | No data | 39.6 |
| SciCode | No data | 57.4% |
| GPQA Diamond | No data | 90.4% |
| Humanity's Last Exam | No data | 45.5% |
| Long-context reasoning (AA-LCR) | No data | 79% |
Independent evaluations by Artificial Analysis, run the same way for every model, at the reasoning setting shown. Percentages unless marked as an index.
Frequently asked questions
Should I choose GPT-5.6 Cyber or Muse Spark 1.2?
Choose GPT-5.6 Cyber for images as input and the latest release. Choose Muse Spark 1.2 for very long inputs.
Which is cheaper, GPT-5.6 Cyber or Muse Spark 1.2?
A price comparison is not possible: one of them has no comparable published price.
Which has the larger context window, GPT-5.6 Cyber or Muse Spark 1.2?
Muse Spark 1.2 reads more per request: 1.05M tokens against 400k.
What is the difference between GPT-5.6 Cyber and Muse Spark 1.2?
GPT-5.6 Cyber is made by OpenAI and Muse Spark 1.2 by Meta. A price comparison is not possible: one of them has no comparable published price. Muse Spark 1.2 reads more per request: 1.05M tokens against 400k. Only GPT-5.6 Cyber offers vision, reasoning, structured output, batch api.
Which is newer, GPT-5.6 Cyber or Muse Spark 1.2?
GPT-5.6 Cyber was released on Aug 7, 2026 and Muse Spark 1.2 on Aug 5, 2026.