Muse Spark 1.3 (xhigh) scores 61 at $0.55 per index task, the lowest cost among models at 59 or higher, which changes cost-quality choices for AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition → workloads.
Key takeaways · AI-distilled
Artificial Analysis reports that Muse Spark 1.3 max improves banking and knowledge-work scores over xhigh by using more turns and reasoning tokenThe chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.Full definition →. The higher-effort variant was in limited preview at the evalA repeatable test for AI quality — a set of tasks plus scoring — used the way software teams use test suites, because model output is too variable to judge by eyeballing.Full definition →.
Muse Spark 1.3 xhigh cost $0.55 per task versus $0.40 for Muse Spark 1.2 despite unchanged token prices in the reported evaluation. Artificial Analysis attributes the increase mainly to more input tokens on agentic tasks.
Muse Spark 1.3's lower factual-answer accuracy partly reflects more abstentions. Artificial Analysis also reports a lower hallucinationWhen a model states something false with full confidence — inventing facts, citations, or APIs that don't exist.Full definition → rate for xhigh, so the accuracy decline alone does not establish worse reliability.
Terms in this piece · Glossary
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
token — The chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.
eval — A repeatable test for AI quality — a set of tasks plus scoring — used the way software teams use test suites, because model output is too variable to judge by eyeballing.
hallucination — When a model states something false with full confidence — inventing facts, citations, or APIs that don't exist.
