Muse Spark 1.2
Muse Spark 1.2 is a coding-focused update to Muse Spark 1.1 with improvements in code generation, complex debugging, codebase understanding, and end-to-end developer workflows.
ECI STANDING#21 of 266
SCORE155.48153.9–158.64 CI
FRONTIER LAGLaunched 5.9 months behindScores about what GPT-5.3 Codex did in February 2026.
SCORES LIKE THESE MODELSDeepSeek V4 Pro 0813DeepSeek · Aug 2026155.47GPT-5.2 ProOpenAI · Dec 2025155.38Claude Opus 4.6Anthropic · Feb 2026155.34GLM-5.3Z.ai (Zhipu AI) · Aug 2026155.25
Full Epoch Capabilities Index ranking ↗RELEASE DATEAug 5, 2026
WEIGHTSClosed weights
CONTEXT WINDOW1.05M
MAX OUTPUT131.1K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image, video, pdf, audio
OUTPUTStext
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.