Meta's paid frontier model and Microsoft's own AI chip lifted two megacaps. FICO rebounded and Chipotle slipped

On a day when the Nasdaq fell and chipmakers slid, two of the largest companies in the market went the other way. Both moved on product news about artificial intelligence, and both announcements were about the same goal from different directions: making AI pay for itself.

Meta puts its best model behind a paywall

Meta Platforms rose about 3.4% to $742.96. The company released Muse Wonder and Muse Wonder Full, which it describes as its most capable models to date, built for what it calls personal and professional agentic tasks, such as navigating an insurance claim, making sense of a lease or building a working app.

TechCrunch called it Meta's first attempt at a frontier model since Alexandr Wang restructured the company's AI efforts in August of last year. Meta published benchmarks showing the models matching or topping the latest releases from OpenAI and Anthropic, Axios reported.

"These are true frontier models, competitive with the best models in the world." — Alexandr Wang, head of Meta Superintelligence Labs, to Axios

The business angle may matter more than the benchmarks. CNBC reported that users of the Muse app will need a monthly plan of $20 or $100 to get the new model, and that the more powerful Muse Wonder Full is limited to subscribers of Meta's Muse Code coding agent, at $50 or $200 a month. Developers can reach Muse Wonder through the Meta Model API. Wang told CNBC the API will be priced "meaningfully below" leading models from OpenAI and Anthropic. CNBC framed the release as a test of whether users will pay, and of Meta's push for AI revenue beyond advertising.

Microsoft's bet on its own silicon

Microsoft rose about 1.1% to $541.15. It unveiled Maia 300, the third generation of its in-house AI chip, and said the Maia family will become the primary system for running AI models across its products and services. Production of Maia 300 begins in 2027, CNBC reported. Chief executive Satya Nadella called it "our biggest bet yet on our own silicon" in a post on X, according to GeekWire.

Microsoft says Maia 300 produces 40% more AI output for the same power as leading GPU-based systems, and that it will fit 96 chips in each data-centre rack, twice as many as the current Maia 200. The chips are designed by Microsoft and manufactured by Taiwan Semiconductor Manufacturing. Microsoft still buys from Nvidia and works with Nvidia and AMD on training models.

Reuters reported that Microsoft's market value rose above $4 trillion during the session for the first time in a year. The company reports quarterly results on October 28.

Fair Isaac bounces back

Fair Isaac, the company behind FICO credit scores, was one of the best performers in the market, rising 10.85% to $740.00. The reporting we reviewed did not tie the move to a single company announcement. The stock has been under pressure since late September, when the Federal Housing Finance Agency moved to put the rival VantageScore 4.0 model on pricing parity with classic FICO scores at Fannie Mae and Freddie Mac. Monday's gain recovered only part of that slide.

Chipotle loses its takeover premium

Chipotle Mexican Grill fell about 3.8% to $30.40 after Starbucks ended days of takeover speculation. The Financial Times reported on October 8 that Starbucks had worked with advisers on a potential proposal to acquire the burrito chain, which Starbucks chief executive Brian Niccol ran for six years.

"As a matter of policy, we don't comment on rumors and speculation, but we want to be clear we are not buying Chipotle." — Starbucks spokesperson, as reported by Reuters

Chipotle declined to comment. Starbucks said its management remains focused on its "Back to Starbucks" strategy and plans to share fourth-quarter results and its fiscal 2027 outlook later this month.

Analyst calls moved other names

Several other gains came from changes in Wall Street ratings rather than company news. Salesforce rose about 2.1% after Bank of America upgraded it by two notches, arguing that AI should deepen customers' dependence on its software rather than disrupt it. eBay added about 2.2% after Morgan Stanley named it a top pick, citing the live-selling market. It had been up more than 5% at midday, CNBC reported.

What to watch

For Meta, the measure that matters is uptake: how many Muse users sign up for a paid plan, and whether developers adopt the API. For Microsoft, the October 28 report will show how AI spending is tracking. In the near term, both trade in a market that turns to bank earnings on Tuesday and inflation data on Wednesday.