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# The Evening Update: Meta Opens Muse Spark Open Weights, Keeps Muse Wonder Closed
- URL: https://bytevyte.com/meta-muse-spark-open-weights-2026-10-19/
- Published: 2026-10-19T21:25:00.000Z
- Updated: 2026-10-19T21:25:00.000Z
- Description: Meta released Muse Spark Open, an 816B-parameter open-weight model, while keeping Muse Wonder closed. Also: Google Universal Cart and more.
- Author: Bytevyte Editorial
- Tags: ai-beats

This edition of **The Evening Update** covers AI business stories since the last edition, as of 2026-10-19\. The most consequential item is Meta's release of **Muse Spark Open** on October 15, 2026, an open-weight model with 816 billion parameters. The stronger Muse Wonder tier stays closed.

## Muse Spark Open: Open Weights, Closed Top Tier

Meta published the weights for Muse Spark Open, a mixture-of-experts model with 42 billion active parameters. The model is natively multimodal and offers a 1-million-token context window, aimed at agentic tasks, software engineering and multi-step reasoning. Meta says full local execution on Apple Silicon through MLX requires two Apple M5 Ultra Mac Studios with 1.2 TB/s of memory bandwidth. Weights are available through Hugging Face, Amazon SageMaker AI, Google Cloud Model Garden and Microsoft Foundry Models, while hosted API access runs through seven providers. Developers should note that the Muse Model License carries limited commercial terms.

## Google Universal Cart

Google Universal Cart began rolling out to US shoppers on October 15, 2026, across Google Search, including AI Mode, and the Gemini app. The cart gathers products from several retailers, tracks prices and stock, and sends alerts on price drops and restocks. Shoppers can pay inside the cart with Google Pay or hand items to the merchant's own site, and the two routes offer different basket control. The savings depend on the retailer, since several large merchants reportedly support only some checkout paths.

## Also on our site

[Anthropic](https://bytevyte.com/anthropic-public-benefit-fund-would-hold-5-of-shares-before-ipo/) plans to commit 5% of its shares to the Anthropic Public Benefit Fund, subject to shareholder approval and tied to its expected IPO.

[SpaceX debt talks](https://bytevyte.com/spacex-debt-nvidia-chip-financing/) involve a reported $40 billion split between bank loans and bonds, earmarked for Nvidia chips for Memphis and orbital AI compute. The terms are unconfirmed. Because the plan centers on AI compute capacity, the neighborhood and environmental costs of such facilities deserve scrutiny, including on-site gas turbine noise, emissions from gas-fired power and the water used for cooling.

A [Massachusetts Senate bill](https://bytevyte.com/massachusetts-independent-ai-evaluations/) would require independent evaluations of frontier AI models every 120 days, with developers paying the reviewers. The bill is still under negotiation.

## Related Articles

- [Meta Muse Wonder Models Arrive, With the Strongest Version Behind a Subscription](https://bytevyte.com/meta-muse-wonder-frontier-pricing/)
- [Coding Agent Race This Week: Open Weights, Breaking Releases, Tooling Shifts](https://bytevyte.com/coding-agent-race-this-week-open-weights-breaking-releases-tooling-shifts/)
- [Meta's Muse Spark Math Papers Draw a Challenge Over Open Problems](https://bytevyte.com/metas-muse-spark-math-papers-draw-a-challenge-over-open-problems/)

✔Human Verified

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*Researched and cross-referenced against primary sources by the Bytevyte editorial team. This article was generated with the assistance of artificial intelligence and reviewed by the Bytevyte editorial team.*