Muse Spark 1.3 for Copilot Chat

VS Code Marketplace · Open VSX · Releases

Adds Muse Spark 1.3 (plus 1.2, 1.1, and discounted Contributor variants) to the Copilot Chat model picker. Uses your Meta API key (BYOK).

Features

• Model muse-spark-1.3 (1,048,576 context, 131,072 max output) — the latest checkpoint, tuned for agentic workflows with improved coding
• Model muse-spark-1.3-contributor — same checkpoint, heavily discounted Contributor tier
• Model muse-spark-1.2 / muse-spark-1.1 — earlier checkpoints, still supported
• Multimodal input: text, image, video, PDF (for audio input, use 1.2 — 1.3 audio support is not fully ready)
• Native vision via base64 image_url content parts (no proxy)
• Reasoning effort: minimal, low, medium (default), high, xhigh, and max (Standard-tier muse-spark-1.3 only)
• Works with Copilot agent mode, tools, instructions, MCP, and skills via LanguageModelChatProvider

Requirements

• VS Code 1.116+
• GitHub Copilot (Free, Pro, or Enterprise)
• Meta API key from dev.meta.ai (LLM|...)

Install

1. Install from the VS Code Marketplace or Open VSX
2. Command Palette → Meta Spark: Set API Key
3. Open Copilot Chat and select Muse Spark 1.3

Configuration

Setting	Default	Description
meta-spark-copilot.baseUrl	https://api.meta.ai/v1	API base URL
meta-spark-copilot.maxCompletionTokens	0	Max output tokens (0 = API default)
meta-spark-copilot.modelIdOverrides	official IDs	Override model IDs for proxies
meta-spark-copilot.debugMode	minimal	minimal / metadata / verbose
meta-spark-copilot.experimental.stabilizeToolList	false	Experimental tool-list stabilization

Pricing and limits

Standard tier (muse-spark-1.1, muse-spark-1.2, muse-spark-1.3):

• Pricing: $1.25 / 1M input, $0.15 / 1M cached input, $4.25 / 1M output
• Rat