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Meta

Muse Spark 1.3

Meta’s agentic coder with a 1M window

Open weightsReleased: September 2, 2026ValueVerified: October 24, 2026

What it is

Meta’s agentic and coding model: a 1,048,576-token context, text, image, video, audio and PDF input, and standard pricing of $1.25/$4.25 per 1M tokens. Meta also publishes an open-weight release, Muse Spark Open.

NLT take

The cheapest 1M-context model from a US lab on this list, and the only one with a matching open-weight release. Worth an eval if you want a non-Anthropic, non-OpenAI agent model with image and video input.

Before you switch

Meta does not publish a release date for 1.3 in the docs we could read, and its open release is a separate repo/name (Muse Spark Open), not the hosted endpoint.

Cost for a real task

The same task on every model: 50,000 input tokens and 10,000 output tokens, at the base tier.

Task cost

$0.11

50K input + 10K output tokens

Input, per 1M
$1.25
Output, per 1M
$4.25
Cached input, per 1M
$0.15

Pricing source: Meta Model API pricing

Specs

Maker
Meta
Licence
Open weights
Released
September 2, 2026
Context window
1,048,576 tokens
Input / output
Text · Image · Audio · Video · PDF → Text

Also known as: muse-spark-1.3 · Muse Spark Open

Watch it in action

Hands-on videos from creators we trust. They open on YouTube; we do not host or re-upload them.

From our coverage

Articles about this model or its family. A “Background” tag means we have not covered this exact release yet.

Sources & model links

Every number on this card traces back to one of these links. The maker page proves the positioning, the pricing page proves the rates, the Hugging Face repo proves the weights exist, and the Ollama page proves a local tag.

Official

Open weights

Run locally