---
id: "meta/muse-spark-1.3-contributor"
also: ["meta/muse-spark-1.3-contributor-20260902", "vercel/meta/muse-spark-1.3-contributor"]
card_usd_per_m: "0.1 in, 0.2 out, at meta"
cheapest_list_usd_per_m: "0.1 in, 0.2 out, at meta on openrouter"
cheapest_effective_usd_per_m: "0.0091 in, 0.1996 out, at meta on openrouter"
context: 1048576
max_output: 943718
input: ["text", "image", "video", "file"]
output: ["text"]
released: "2026-09-02"
reasoning: ["max", "xhigh", "high", "medium", "low", "minimal"]
api: ["/api/v1/chat/completions", "/api/v1/completions", "/api/v1/messages", "/api/v1/responses"]
params: ["include_reasoning", "max_tokens", "reasoning", "reasoning_effort", "repetition_penalty", "response_format", "stop", "structured_outputs", "temperature", "tool_choice", "tools", "top_k", "top_p"]
endpoints: 2
gateways: "openrouter (1), vercel (1)"
no_training: 0
trains: 2
retains_prompts: 2
---
# Meta: Muse Spark 1.3 Contributor

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.