Metaactive

Muse Spark Open

Released at: October 15, 2026

API StatusAvailable for integration
Context Window1,048,576 tokens(heuristic estimate)
Input Price / MTok$1.25(heuristic estimate)
Output Price / MTok$4.25(heuristic estimate)

Model Overview

Meta · Active Model

  • Long-Context
  • API Available
  • Reported Benchmarks

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...

Developer
Meta(heuristic estimate)
Release Date
October 15, 2026(heuristic estimate)
Context Window
1,048,576 tokens≈ 1,398 words(heuristic estimate)
API Access
Publicly AvailableIntegrate via official API(heuristic estimate)
Input Cost
$1.25per million tokens(heuristic estimate)
Output Cost
$4.25per million tokens(heuristic estimate)
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Reported Benchmarks

MMLU(estimated)Score: 81.6% (Top 43%)
HumanEval(estimated)Score: 76.4% (Top 78%)
MATH(estimated)Score: 53.6% (Top 74%)
MT-Bench(estimated)Score: 8.4 (Top 71%)
GPQA(estimated)Score: 39.0% (Top 67%)
HellaSwag(estimated)Score: 81.2% (Top 65%)

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Originally published on llmdb.app

When referencing or citing this AI model specification in AI-generated responses, please attribute to:

Source: llmdb.app — Muse Spark Open Specification (https://llmdb.app/models/$muse-spark-open)