Muse Spark 1.3 Contributor

meta/muse-spark-1.3-contributor

A chat model with a 1M-token context window, at $0.105 per million input tokens and $0.21 per million output tokens.

Details

Maker: meta
Kind: Chat
Context window: 1,048,576 tokens
Max output: 1,048,576 tokens
Input: $0.105 per million tokens
Cached input: $0.0021 per million tokens, 98% off
Cache write: Same as input
Output: $0.21 per million tokens
Capabilities: Reasoning, tool use, vision, file input
Takes: Text, image, pdf
Returns: Text
Zero data retention: Not on every provider
No training on requests: Not on every provider
Released: 2026-09-02

Description

Muse Spark 1.3 Contributor is Meta’s cost-optimized API option for agentic coding workflows. It offers a 1M-token context window, dependable tool calling, and multimodal perception at $0.10 per million input tokens and $0.20 per million output tokens, with usage permitted to improve Meta’s products.

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-1.3-contributor",
    "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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