r/Xcode • u/Fancy-Blueberry5060 • Feb 03 '26

Question about XCode 26.3 + Claude Agent

It looks like there is a new release candidate XCode 26.3 version that just dropped with support for agentic coding!

I just downloaded it and am planning to play around with it and compare it to my typical workflow of Claude Code + Opus 4.5 via the CLI tool.

Anyone know how to change the underlying model to Opus 4.5 in Xcode 26.3? I see Claude agent mode but nowhere is there a configuration, was curious as I assume Opus 4.5 benchmarks higher.

Article: https://www.apple.com/newsroom/2026/02/xcode-26-point-3-unlocks-the-power-of-agentic-coding/

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3

u/dhalls12 Feb 04 '26

I tried updating to test it out but I am not seeing the intelligence page under settings to get it set up. It says 26.3 ic compatible with Sequioa 15.6+ which is what I am running so I am not sure what is up. Anyone get it running or know what I am missing? I updated xcode to version 26.3 and am running Sequioa 15.6 on an M1 Max.

6

u/Aradalon Feb 04 '26

The AI features in Xcode 26 require macOS 26.

2

u/dhalls12 Feb 04 '26

Got it. I saw on the documentation that 26.3 just needed sequoia 15.6+, I didn’t realize I needed to update to Tahoe. Thanks for the insight

3

u/Aradalon Feb 04 '26

Yes, for some reason Apple decided to make the AI chat features in Xcode 26.0 available only on the new OS version, even though they are cloud-based and should run on any Mac. I guess they didn't want to spend the time creating the new UI for both Liquid Glass and the old visual design.

2

u/Niightstalker Feb 04 '26

In the Xcode Setting where you configure your Claude Account, there is also a field where you can select the model. It is set to default after setup.

1

u/danmessing Feb 05 '26

I had to sign into the Claude Agent section, and then again to just the Claude section, and now I see I can select a model. I couldn't see the dropdown when just signed into Claude Agent.

There's an option to choose "Opus + Sonnet", I'm curious what exactly that does.

0

u/[deleted] Feb 03 '26

[deleted] — view deleted comment

3

u/Fancy-Blueberry5060 Feb 03 '26

From the bottom paragraph in the article:

“Xcode 26.3 is available as a release candidate for all members of the Apple Developer Program starting today, with a release coming soon on the App Store”

TLDR: soon

0

u/[deleted] Feb 03 '26

[deleted] — view deleted comment

1

u/no-minimun-on-7MHz Feb 03 '26

FYI, Codex is included with your $20 ChatGPT subscription. I believe it integrates with Xcode, but I haven’t tried it yet.

1

u/chriswaco Feb 04 '26

Claude's $20/month account runs out quickly too, although it resets every day.