# Muse Spark Open 816B A42B API Pricing

As of October 21, 2026, Muse Spark Open 816B A42B costs $1.25 per 1M input tokens and $4.25 per 1M output tokens on Together AI, with cache reads at $0.15 per 1M tokens. It has a 1,048,576-token context window.

- Page: https://models.litellm.ai/models/muse-spark-open-816b-a42b
- Lab: Meta
- LiteLLM model name: `together_ai/meta-models/Muse-Spark-Open-816B-A42B`
- Context window: 1,048,576 tokens
- Added to LiteLLM: October 15, 2026
- Prices updated: October 15, 2026

## Pricing by provider

Token prices in USD per 1M tokens.

| Provider | Model name | Input | Output | Cache read | Per image | Per second | Context |
|---|---|---|---|---|---|---|---|
| Together AI | `together_ai/meta-models/Muse-Spark-Open-816B-A42B` | $1.25 | $4.25 | $0.15 | – | – | 1M |

## Cost examples

1,000 requests with 2,000 input and 500 output tokens each:

- Together AI: $4.625

100 long-document requests with 100,000 input and 2,000 output tokens each:

- Together AI: $13.35

## Features

Supported: Function calling, Structured output, Prompt caching.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="together_ai/meta-models/Muse-Spark-Open-816B-A42B",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## Cost calculator

10,000 requests a day with 1,000 input and 500 output tokens each, at Together AI's price: $0.003375 per request, $33.75 per day, $1,013 per month (30 days). Try other numbers at https://models.litellm.ai/calculator?model=muse-spark-open-816b-a42b

## FAQ

### How much does Muse Spark Open 816B A42B cost?

Muse Spark Open 816B A42B costs $1.25 per 1M input tokens and $4.25 per 1M output tokens on Together AI, with cache reads at $0.15 per 1M tokens.

### What is the context window of Muse Spark Open 816B A42B?

Muse Spark Open 816B A42B has a 1,048,576-token context window.

### Which providers offer Muse Spark Open 816B A42B?

Muse Spark Open 816B A42B is available from Together AI through LiteLLM, using the model name together_ai/meta-models/Muse-Spark-Open-816B-A42B.

### How do I call Muse Spark Open 816B A42B with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="together_ai/meta-models/Muse-Spark-Open-816B-A42B", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does Muse Spark Open 816B A42B support?

Muse Spark Open 816B A42B supports function calling, structured output and prompt caching.

### When did LiteLLM add Muse Spark Open 816B A42B?

Muse Spark Open 816B A42B was added to LiteLLM's model price file on October 15, 2026.

Source: LiteLLM model price file, https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json. Maintainers update it from each provider's published pricing, and this page is usually rebuilt within 20 minutes of every change.