Meta
Muse Spark Open
Muse Spark Open is a coding-optimized open-weight model.
At a glance
- Input / 1M
- $1.25
- Output / 1M
- $4.25
- Context
- 1.05M
- Max output
- 944K
- Intelligence
- 24.7
- Released
- Oct 2026
Pricing
Muse Spark Open API pricing
Per-token rates, plus what common tasks actually cost.
| Input tokensPer 1M tokens | $1.25 |
|---|---|
| Output tokensPer 1M tokens | $4.25 |
| Cached input (read)Per 1M tokens | $0.15 |
| Cache writePer 1M tokens | Not available |
Chat message
2K in, 500 out
$4.63
per 1,000 requests
Coding task
30K in, 4K out
$54.50
per 1,000 requests
Long document summary
150K in, 2K out
$196
per 1,000 requests
Benchmarks
Muse Spark Open benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
24.7
Coding index
Not available
Agentic index
Not available
Specs
Context window and capabilities
What it can read, what it can write, and which API features it supports.
- Context window
- 1.05M tokens
- Max output
- 944K tokens
- Input types
- Audio, File, Image, Text, Video
- Output types
- Text
- Reasoning effort
- Extra high, High, Medium, Low
- Release date
- October 15, 2026
- Tool calling
- Structured outputs
- JSON mode
- Reasoning
- Temperature
- Stop sequences
- Deterministic seed
- Verbosity control
Compare
Muse Spark Open vs other models
See how Muse Spark Open stacks up head to head on price, benchmarks, and features.
Muse Spark Open vs Muse Spark 1.3
Meta vs Meta
See comparisonMuse Spark Open vs GLM 5.3
Meta vs Z.ai
See comparison
Muse Spark Open vs Gemini 3.8 Flash
Meta vs Google
See comparison
Muse Spark Open vs DeepSeek V4.1 Flash 1017
Meta vs DeepSeek
See comparisonMuse Spark Open vs Step 5 Preview
Meta vs StepFun
See comparison
Muse Spark Open vs GPT-6 Luna
Meta vs OpenAI
See comparisonAlternatives
Muse Spark Open alternatives
Similar models worth considering, and where each one has the edge.
Meta
Muse Spark 1.3
Z.ai
GLM 5.3
Gemini 3.8 Flash
Want to learn about other models? Browse all models
FAQ
Frequently asked questions
How much does Muse Spark Open cost?
Muse Spark Open costs $1.25 per 1M input tokens and $4.25 per 1M output tokens through the API. A typical chat message costs about $4.63 per 1,000 messages.
What is the context window of Muse Spark Open?
Muse Spark Open accepts up to 1.05M tokens of input and can write up to 944K tokens in a single response.
What is the best alternative to Muse Spark Open?
Muse Spark 1.3 from Meta is a strong alternative. It offers: higher intelligence score.
Can I use Muse Spark Open alongside other models?
Yes. Shortcut Chat sends one prompt to Muse Spark Open and any other models you pick at the same time, so you can compare answers side by side.
Try Muse Spark Open next to every other model.
Use Muse Spark Open alongside all the other models. Use one at a time, or multiple together. Get the best answer from every AI.