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Meta: Muse Spark 1.2

muse-spark-1.2

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Muse Spark 1.2 costs $1.63 per million input tokens and $5.53 per million output tokens, supports 1M context, and is available through the OpenAI-compatible API.

Meta's Muse Spark 1.2 is a multimodal reasoning model for complex agentic and coding tasks, with tool calling, structured output, and a one-million-token context window.

Modalities

Text + Image + Video + Audio → Text

Input / output price

$1.63 / $5.53 per 1M

Context

1M · max output 66K

Capabilities

ReasoningVisionTool callingLong context

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$1.63
Output$5.53
Cached input$0.195

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.00929
Per day
$4.65
Per month (30 days)
$139.43

Muse Spark 1.2: input $1.625/M · output $5.525/M · cached input $0.195/M

Request with these settings
curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "muse-spark-1.2", "max_tokens": 800,
       "messages": [{"role": "user", "content": "…"}]}'

Code samples

OpenAI-compatible. Set the base URL to https://api.geniusrelaygpt.com/v1 and the model to muse-spark-1.2.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "muse-spark-1.2",
    "stream": true,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Use it in a client: Cursor · Cline · SillyTavern · Codex

Parameters

Common OpenAI parameters can be passed as-is.

temperaturetop_pmax_tokensstreamstoppresence_penaltyfrequency_penaltyseed

FAQ

How is Muse Spark 1.2 billed?
Input is $1.63 and output is $5.53 per million tokens; cached input is $0.195. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
1M tokens. In a long conversation every turn is billed for the full input, so keep the history under control.
Does it support streaming?
Yes. Add "stream": true to the request to receive server-sent events in the OpenAI format.
Muse Spark 1.2 API pricing · GeniusRelay