Muse Spark 1.1

meta/muse-spark-1.1

A chat model with a 1M-token context window, at $1.3125 per million input tokens and $4.4625 per million output tokens.

Details

Maker: meta
Kind: Chat
Context window: 1,048,576 tokens
Max output: 1,048,576 tokens
Input: $1.3125 per million tokens
Cached input: $0.1575 per million tokens, 88% off
Cache write: Same as input
Output: $4.4625 per million tokens
Capabilities: Reasoning, tool use, vision, file input
Takes: Text, image, pdf
Returns: Text
Zero data retention: Yes, on every provider
No training on requests: Yes, on every provider
Released: 2026-07-09
Newer model: meta/muse-spark-1.3Released later by the same maker, costs no more, and lists the same capabilities. Compare the two

Description

Muse Spark 1.1 is strongest at agentic performance, tool use, and computer use. It does well on long-running tasks with 1M token context window, can delegate execution to sub-agents running in parallel, and is trained to use computer interfaces on desktop, mobile, or browser.

Call it

curl

curl https://phantom.codes/v1/chat/completions \
  -H "Authorization: Bearer $PHANTOM_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "meta/muse-spark-1.1",
    "messages": [
      {"role": "user", "content": "Hello"}
    ]
  }'

Set PHANTOM_KEY to your key. Any OpenAI client works with the base URL https://phantom.codes/v1.

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