Muse Spark 1.3
Meta · September 2, 2026
● activeOpen Weightdense transformertext
Parameters70B
Context Window256K tokens
Description
Meta's flagship open coding and agentic model with upgraded terminal navigation and autonomous test-driven refinement.
Benchmark Scores
MMLUMassive Multitask Language Understanding — 57 subjects
88.9%HumanEvalCode generation pass@1 — Python problems
91.4%MATHMATH benchmark — competition-level problems
92.5%SWE-benchReal-world software engineering
62.1%Key Innovations
Open Weight
Open WeightModel weights are publicly released but training data/code may not be. Enables fine-tuning but not full reproduction.
Code Gen
Code GenAbility to write, debug, and understand programming code across multiple languages.
Agentic
AgenticModels that can autonomously plan, execute multi-step tasks, use tools, and self-correct without human intervention.
Tool Use
Tool UseAbility to call external tools, APIs, and functions — enabling web browsing, code execution, and real-world actions.