Muse Spark Open
by Metameta/muse-spark-open
LLMCompare cannot run Muse Spark Open yet.No route to this model is configured on this site yet. Its prices and parameters are listed below for reference.
See the models that can be run nowMuse Spark Open at a glance
- Context length
- 1,048,576 tokens
- Maximum output
- 943,718 tokens
- Accepts
- Text, Image, File, Audio, Video
- Returns
- Text
- Features
- ReasoningJSON outputTool callingPrompt cachingImage input
- Reasoning effort levels
xhighhighmediumlowReasoning is always on for this model.- Released
- 15 Oct 2026
- Knowledge cutoff
- Not published
Model facts synced from the OpenRouter model list on 21 Oct 2026.
Muse Spark Open pricing by route
A route is the service LLMCompare calls to reach the model. Muse Spark Open has 1 route. Prices are in US dollars.
| Route | On LLMCompare | Inputper 1M tokens | Outputper 1M tokens | Cache readper 1M tokens | Price verified on | Source |
|---|---|---|---|---|---|---|
| OpenRouterDefault | Not configured | $1.25 | $4.25 | $0.15 | openrouter.ai/meta/muse-spark-open |
The cost shown in an LLMCompare report is calculated from these prices as they were at the time of the run.
Cost calculator
Estimate what a batch of calls to Muse Spark Open costs. The starting numbers are examples. Change them to match your task.
Part of the input tokens above, billed at the cache read price.
Billed in addition to the output tokens.
- Cost per call
- $0.0034
- 5 credits
- Cost of 100 calls
- $0.3375
- 500 credits
Calculated from the OpenRouter prices verified on 21 Oct 2026. Credits are the cost plus a 20% service fee, at $0.001 per credit, rounded up for each call, with a minimum of 1 per call. A real run is charged for the usage the provider reports.
Parameters you can set
These are the parameters LLMCompare can set when it calls the model through OpenRouter.
| Parameter | Type | Range or options | Default |
|---|---|---|---|
temperature | Number | 0 to 2in steps of 0.1 | Provider default |
top_p | Number | 0 to 1in steps of 0.05 | Provider default |
max_tokens | Integer | 1 to 943,718 | Provider default |
reasoning_effort | One of | xhighhighmediumlow | medium |
seed | Integer | -2,147,483,648 to 4,294,967,295 | Provider default |
response_format | One of | textjson_object | Provider default |
About Muse Spark Open
Muse Spark Open is a coding-optimized open-weight model. Trained specifically for agentic coding workflows, it delivers higher first-attempt accuracy, reliable tool calling, and deep codebase understanding across the repos developers...
Description as published for this model. LLMCompare has not edited it.
Models to compare with Muse Spark Open
Text models from the same provider and models at the nearest price. The order is not a ranking.
| Add to comparison | Model | Context | Max output | Input priceper 1M tokens | Output priceper 1M tokens | Features | Released | On LLMCompare |
|---|---|---|---|---|---|---|---|---|
Muse Spark 1.3Metameta/muse-spark-1.3 | 1.05M | 944k | $1.25 | $4.25 | ReasoningJSONToolsCacheVision | No route yet | ||
Muse Spark 1.2Metameta/muse-spark-1.2 | 1.05M | 944k | $1.25 | $4.25 | ReasoningJSONToolsCacheVision | No route yet | ||
Muse Spark 1.1Metameta/muse-spark-1.1 | 1.05M | 944k | $1.25 | $4.25 | ReasoningJSONToolsCacheVision | No route yet | ||
o4 Mini HighOpenAIopenai/o4-mini-high | 200k | 100k | $1.10 | $4.40 | ReasoningJSONToolsCacheVision | No route yet | ||
o4 MiniOpenAIopenai/o4-mini | 200k | 100k | $1.10 | $4.40 | JSONToolsCacheVision | No route yet | ||
o3 Mini HighOpenAIopenai/o3-mini-high | 200k | 100k | $1.10 | $4.40 | ReasoningJSONToolsCache | No route yet |
Questions about Muse Spark Open
- How much does Muse Spark Open cost?
- On the OpenRouter route, Muse Spark Open costs $1.25 per 1 million input tokens and $4.25 per 1 million output tokens, in US dollars. Input tokens that Muse Spark Open reads from the prompt cache cost $0.15 per 1 million tokens. LLMCompare verified this price on 21 Oct 2026.
- What is the context length of Muse Spark Open?
- Muse Spark Open has a context length of 1,048,576 tokens and returns up to 943,718 output tokens in one call.
- What inputs does Muse Spark Open accept?
- Muse Spark Open accepts these inputs: Text, Image, File, Audio, Video. Muse Spark Open returns: Text.
- Which reasoning effort levels does Muse Spark Open support?
- Muse Spark Open supports these reasoning effort levels: xhigh, high, medium, low. Reasoning is always on for Muse Spark Open and cannot be turned off.
- Can I test Muse Spark Open on my own data?
- Not yet. LLMCompare lists the prices and parameters of Muse Spark Open, but no route to Muse Spark Open is configured on LLMCompare, so it cannot be selected for an evaluation.