meta/muse-spark-1.3Muse Spark 1.3 is Meta AI’s proprietary AI model, released Sep 2, 2026. It scores 157 on the Epoch Capabilities Index, costs $1.25/M input and $4.25/M output tokens, and handles a 1M-token context window. Its strongest use case is coding, where it ranks in the 91st percentile of the models Model Beat tracks.
Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows.
Scores on standardized evaluations. Higher is better — and rank shows where Muse Spark 1.3 lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Scientific research coding
Human-rated web development
Olympiad-qualifier math
Multi-step agentic tasks
Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows.
Muse Spark 1.3 is an AI model developed by Meta AI, released Sep 2, 2026.
Muse Spark 1.3's list price from Meta AI is $1.25 per million input tokens and $4.25 per million output tokens.
Muse Spark 1.3 supports a context window of up to 1M tokens.
On standardized evaluations tracked by Epoch AI, Muse Spark 1.3 scores 48.7% on Humanity's Last Exam, 58.8% on SciCode, 1652 on WebDev Arena.
Muse Spark 1.3 is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Oct 29, 2026.