Muse Spark 1.3

Meta

A multimodal reasoning model for coding and long-running agentic workflows, improving instruction following and efficiency over Muse Spark 1.2.

Specs

Model

Family
Muse Spark
Variant
1.3
Weights
Proprietary

Limits

Context
1,048,576 tokens
Max output
131,072 tokens

Modalities

Input
Text Image Video PDF Audio
Output
Text

Pricing

Input
$1.25 / 1M
Output
$4.25 / 1M
Cache read
$0.15 / 1M

Capabilities

Reasoning
Yes
Reasoning control
Effort levels
Tool calling
Yes
Attachments
Yes

Dates

Announced
2 Sept 2026
Released
2 Sept 2026

Introducing Muse Spark 1.3

Meta Superintelligence Labs releases Muse Spark 1.3, a coding and agentic model that asks clarifying questions, confirms before consequential actions, and uses ~20% fewer tool calls and ~25% fewer tokens than 1.2. Shipping in Muse Code and the Meta Model API; max reasoning follows after safety testing.

Meta Superintelligence Labs
research.meta.ai

More from Meta

All models

Muse Wonder Full

Meta

A frontier model for personal and professional agents, combining Active Memory and Active Focus for sustained coding and complex tasks. Available to Muse Code subscribers.

—

Muse Wonder

Meta

A frontier model for personal and professional agents, combining Active Memory and Active Focus for sustained coding and complex tasks. Available through the Meta Model API and Muse Code.

$4 / $20 per 1M · $0.2 cached 27d ago

Muse Spark Open

Meta

An open-weight, natively multimodal model for coding, long-horizon agentic work, and complex software engineering.

Muse Model License24d ago

Keep up with the tools

An occasional email when notable AI dev tools and models land in the directory. No spam, unsubscribe anytime.