Muse Spark 1.3 with max reasoning, in limited preview for partners, scores 62 on the Artificial Analysis Intelligence Index, behind only Fable 5.1 and Opus 5 (@artificialanlys)
ThinkingNews Desk · how this was written
Meta released Muse Spark 1.3 for its Muse Code platform and Meta Model API, saying the update boosts coding efficiency and agentic performance while keeping the price unchanged from the prior version. The model adds a max-reasoning variant that is in limited preview for Meta partners, scoring 62 on the Artificial Analysis Intelligence Index, with the top “max” configuration still under safety testing and not yet broadly available.
Written from all 3 reports below, not from any single one.
How it was reported
- TechMeme·Meta rolls out Muse Spark 1.3 in Muse Code and Meta's API, saying it significantly improves coding and agentic performance, at the same price as its predecessor (Ina Fried/Axios)
Meta released Muse Spark 1.3 for its Muse Code platform and Meta API, claiming the update boosts coding efficiency and agentic performance while keeping the price unchanged from the previous version. The update introduces new features that enhance code generation and autonomous workflow capabilities for developers using the platform.
- Hacker News·Introducing Muse Spark 1.3
Muse Spark 1.3 launches today via Muse Code and the Meta Model API, delivering faster performance on agentic and coding tasks and adding a max-reasoning mode pending safety review. The model improves long-horizon collaboration, asking clarifying questions, handling multitasking, and better recognizing its own limits to reduce hallucinations. Detailed evaluations are available in the accompanying report.
- Hacker News·Muse Spark 1.3
- TechMeme·Muse Spark 1.3 with max reasoning, in limited preview for partners, scores 62 on the Artificial Analysis Intelligence Index, behind only Fable 5.1 and Opus 5 (@artificialanlys)
Meta released Muse Spark 1.3, the fourth Muse Spark model in five months, offering a max-reasoning variant. The model is in limited preview for Meta partners and scores 62 on the Artificial Analysis Intelligence Index, ranking just below Claude Fable 5.1 and Claude Opus 5.
- VentureBeat·Meta says Muse Spark 1.3 has frontier performance — but its best results come from a model developers can’t broadly use yet
Meta released Muse Spark 1.3, which surpasses version 1.2 on long-running agent tasks and attains frontier scores such as 1,754 Elo on GDPval-AA v2 and 66.9 on OSWorld 2.0. The top “max” configuration is still in safety testing and unavailable, while the public “xhigh” variant matches frontier-cluster performance comparable to GPT-5.6 Sol and Claude Opus 5; Anthropic models remain the overall leaders. Pricing stays at $1.25 / M input tokens, $4.25 / M output tokens, and $0.15 / M “fuel” tokens.
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