• Apple on Monday released iOS 18.1, an update for iPhones that includes the first public version of Apple Intelligence, Apple's artificial intelligence system. It also released software updates for iPad and Mac with Apple Intelligence.
• The release is a critical milestone for Apple, which is relying on the feature launch to power its marketing campaign for the iPhone 16 lineup, which was released last month.
• You need an iPhone 15 Pro, iPhone 15 Pro Max or any iPhone 16 model to install and use Apple Intelligence.

Apple on Monday released iOS 18.1, an update that includes the company's artificial intelligence, called Apple Intelligence, for the iPhone 16 and iPhone 15 Pro. It also released software updates for iPad and Mac with Apple Intelligence.

The release is a critical milestone for Apple, which is relying on the feature launch to power its marketing campaign for the iPhone 16 lineup released last month.

It is also Apple's answer to Wall Street's questions about its AI strategy. Apple has taken a different path with its device-based AI than its megacap rivals, which are focused on cloud-based AI systems powered by billions of dollars of Nvidia chips.

Apple Intelligence is limited to start. The first wave of Apple Intelligence features includes writing tools that can proofread or rewrite text, new features that can remove objects from photos and a feature that can summarize a stack of notifications into a single message.

Monday's release includes improvements to Siri, including a new look that makes the entire screen glow around the phone's edges. Siri can answer questions about Apple products, including troubleshooting, and has more natural voices.

However, the update does not let Siri take actions inside of apps, which is expected in another update next year. Plus, another update with ChatGPT integration and image-generation abilities is also scheduled for later this year as part of iOS 18.2.

Some investors believe Apple Intelligence could drive a major upgrade cycle and cement Apple as the leader in daily usage of cutting-edge AI.

"Given the staggered launch of Apple Intelligence, we expect iPhone demand to pick up post initial release of Apple Intelligence in late Oct," Bank of America Securities analyst Wamsi Mohan wrote in an Oct. 25 note.

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You need an iPhone 15 Pro, iPhone 15 Pro Max or any iPhone 16 model to install and use Apple Intelligence. The service primarily uses the iPhone's chip, which is why it does not work on earlier phones, though some more complicated queries will be handled by Apple's servers.

You also need to turn it on by asking for access to Apple Intelligence in the Settings app. Doing so puts users on a waitlist. Apple has not said how long the wait will take, but during beta tests over the summer, users typically received access within the same day. Your phone will then download large files — Apple's AI models — that Apple Intelligence needs to operate.

The most prominent feature included with Apple Intelligence is its ability to summarize notifications. Instead of the typical stack of notifications on previous iPhone interfaces, Apple will summarize an entire stack into a single notification. It has not been perfect, but it can be useful into taking 12 market alerts from CNBC or a long conversation in a group chat into something that can be easily digested.

Another major change that users will quickly notice is that Siri has a new text interface, accessed through swiping up from the bottom of the screen, enabling users to query Siri without speaking out loud.

Apple's Writing Tools will also show up in any place in the operating system that you can enter text, including non-Apple apps. Users can highlight chunks of text and choose to rewrite it in a more "friendly," "professional" or "concise" style. However, Apple's Writing Tools will not generate entire paragraphs without input.

The software suite also includes updates to Apple's Mail and Photos apps. The Photos app now has a more intelligent search, which can understand natural language. It can also generate a short movie from a user's photos.

To download iOS 18.1, go to Settings > General > Software Update. To sign up for the Apple Intelligence waitlist, go to Settings > Apple Intelligence and Siri > Join the Apple Waitlist.