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meta/muse-spark-1-2
Muse Spark 1.2
Muse Spark 1.2 is a reasoning model from Meta, designed for complex agentic tasks. It accepts text, images, video, audio, and PDF documents, returns text, and offers a 1M-token context...
8/5/2026
1,048,576 tokens
Input: ¥219.8968/M
Output: ¥747.6489/M
Specifications
Modalities
Input
text
image
video
file
audio
Output
text
Supported Parameters
include_reasoning
max_tokens
reasoning
reasoning_effort
repetition_penalty
response_format
structured_outputs
temperature
tool_choice
tools
top_k
top_p
Max Output Tokens
943,718Code Examples
curl https://api.fastmetal.ai/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "muse-spark-1.2",
"messages": [{"role": "user", "content": "Hello!"}]
}'Frequently asked questions
- How much does the Muse Spark 1.2 API cost?
- On FastMetal, Muse Spark 1.2 is billed per token in yen: ¥219.9 per 1M input tokens and ¥747.65 per 1M output tokens, before tax. Usage is drawn from a prepaid balance; there is no subscription or monthly fee.
- Can I call Muse Spark 1.2 with the OpenAI SDK?
- Yes. Point base_url at https://api.fastmetal.ai/v1 and pass "muse-spark-1.2" as the model; existing OpenAI-style code works unchanged, including streaming, tool calls and structured output.
- What is the context window of Muse Spark 1.2?
- 1,048,576 tokens, shared between the prompt and the response.
- What do I need to try Muse Spark 1.2?
- Create an account and add credit; the model is then available both in the browser chat and over the API. There is no contract or minimum spend.
Try Muse Spark 1.2 right now
Muse Spark 1.2 is available on FastMetal through one API key. Start in the browser, or call it from the OpenAI SDK.