Muse Spark Open is a coding-optimized open-weight model. Trained specifically for agentic coding workflows, it delivers higher first-attempt accuracy, reliable tool calling, and deep codebase understanding across the repos developers...
With CoreAI, you can start chatting with Meta: Muse Spark Open instantly — no separate subscription needed. CoreAI lets you chat with Meta: Muse Spark Open alongside 300+ other AI models from Meta and other providers like OpenAI, Anthropic, Google, Meta, and more.
Measured against all 445 chat models CoreAI serves, Meta: Muse Spark Open sits at #44 for context capacity — 1.0M tokens, roughly 786,432 words or 1,573 pages of text in a single conversation. On price, it is the #144 cheapest of 204 standard-tier models by input cost. Released 2026-10-15, it is one of the 1 newest additions to the catalog. It supports step-by-step reasoning (thinking mode) and accepts image input.
Every model in this table is available on CoreAI — open the web app and run the same prompt through Meta: Muse Spark Open and Meta: Muse Spark 1.3 side by side to judge with your own eyes.
A typical question (about 1,000 tokens in, 500 out) runs $0.00338 on Meta: Muse Spark Open's raw per-token rates; a heavy session with a 50K-token document costs about $0.084. On CoreAI you don't juggle these numbers — one subscription covers Meta: Muse Spark Open and 300+ other models under a plan usage limit, with no API keys. See plans.
Meta: Muse Spark Open handles 1.0M tokens of context — roughly 786,432 words, or about 1,573 pages of text in one conversation.
Meta: Muse Spark Open's underlying rates are $1.25 per 1M input tokens and $4.25 per 1M output tokens. On CoreAI it is included in one subscription alongside 300+ models, so there is no per-token billing to manage.
Yes — Meta: Muse Spark Open accepts image input, so you can attach screenshots, photos or diagrams and ask questions about them.
Yes. Meta: Muse Spark Open can work through problems step by step before answering; on CoreAI you can toggle thinking mode per message.
Open the CoreAI web app or the iOS/Android app, pick Meta: Muse Spark Open in the model selector, and chat — no API key, no per-token billing. One subscription covers Meta: Muse Spark Open and 300+ other models.
The closest alternatives on CoreAI are Meta: Muse Spark 1.3, Google: Gemini 4 Argon, DeepSeek: DeepSeek Flash Latest — similar tier and capability. The fastest way to choose is running one prompt through them side by side in CoreAI's Compare view.
Chat with Meta: Muse Spark Open and 300+ other AI models — all in one app.