Anthropic Debuts Claude Sonnet 4.5 With Improved Coding - MacRumors
Skip to Content

Anthropic Debuts Claude Sonnet 4.5 With Improved Coding

Anthropic today introduced Claude Sonnet 4.5, which the company says is the "best coding model in the world," outperforming GPT-5 and Gemini 2.5 Pro. It's also the strongest model for building complex agents and using computers, plus Anthropic says that it shows substantial gains in reasoning and math compared to Opus 4.1.

anthopic claude
Along with Claude Sonnet 4.5, Anthropic added a new terminal interface and checkpoints to Claude Code. Checkpoints serve as save points, saving your progress so you can roll back to a previous state as necessary.

The Claude apps now support code execution and file creation for making spreadsheets, slides, and documents directly in the conversation. Claude for Chrome is available as well, with Anthropic allowing some Max users to beta test the feature. There's also a Claude Agent SDK that's available for building agents.


According to Anthropic, Claude Sonnet 4.5 has improved capabilities and extensive safety training to improve its behavior, so there has been a reduction in sycophancy, deception, power-seeking, and the tendency to encourage delusional thinking.

Claude Sonnet 4.5 is available everywhere starting today, and Anthropic recommends that users upgrade.

Popular Stories

iphone 17 pro max battery 1 year

Three Years of 80% Charge Limits on iPhone: The Results

Tuesday October 6, 2026 12:59 pm PDT by
Since 2023, Apple's newer iPhones have had an 80 percent charge limit for those who want to extend battery lifespan. Charging to 80 percent instead of 100 percent is supposed to put less stress on the battery, improving longevity. For the last three years, I've used that setting on my iPhone. I started with the iPhone 15 Pro Max, then did the iPhone 16 Pro Max, and most recently, the iPhone...
apple welcome home event

Apple Product Launch Announced for October 13: 'Welcome Home'

Thursday October 8, 2026 9:04 am PDT by
Apple today announced an upcoming product launch that will take place on Tuesday, October 13. We are expecting Apple's announcement to focus on new smart home products, including the long-rumored smart home hub, a new Apple TV 4K, and a refreshed HomePod mini. Subscribe to the MacRumors YouTube channel for more videos. The home hub is an all-new device that's like a cross between an iPad and...
Black Apple Event Logo

Sources: Apple Planning Two Sets of Product Launches in October

Monday October 5, 2026 7:24 pm PDT by
Bloomberg's Mark Gurman recently reported that Apple plans to unveil an all-new home hub, a new HomePod mini, and a new Apple TV 4K on Tuesday, October 13, and MacRumors has since learned about another launch slated for later in the month. Apple is planning to unveil additional new products in the final week of October, according to multiple sources familiar with the matter. While we do...

Top Rated Comments

14 months ago
I'm not sure I can speak to how well one model does vs another. But I've tried all of them (Gemini, ChatGPT and Claude) and the UI/UX that Antrhopic provides is hands down the best. I know that isn't what most people care about but I really like it. It makes it much easier to work with and create documents and keep track of versions.
Score: 12 Votes (Like | Disagree)
krspkbl Avatar
14 months ago
Claude models are actually really good. Much better than ChatGPT 5.

The problem are the heavy usage limits even for paid users. The £18/month one is so bad I was hitting the limit after an hour. Sometimes even faster.

Once you hit the limit it doesn’t fall back like ChatGPT does to the mini model. Once you hit the limit with Claude that’s you. You need to wait 5 hours to start using it again. They also have added more limits on top of this. For example, you might not hit a daily limit but a weekly limit. You could potentially be locked out for much longer than 5 hours…and I’m talking days.

I was using Claude and when I hit the limit I went back to ChatGPT until it reset.

To be fair, they do at least have an option of I think ~£90/month for 5x more usage on the Max plan. Most other services only have £20 and £200/month options.

Another thing with Claude is after a while it starts to, for lack of a better phrase, **** the bed. I don’t even know how to describe it but it’s like it almost goes crazy and loses focus and context. When coding it doesn’t “see” the code and starts coding gibberish outside it. Gemini does this too after a while so might just be the nature of LLMs. I am not talking about hallucinations.

I ended up deleting my Claude account. The only other AI that is on the same level as Claude is Gemini. Gemini might actually be better but I haven’t tested it enough. From what I’ve used on the free service it is really impressive.

ChatGPT is the best overall AI model but it absolutely sucks at coding. Gemini/Claude is where it’s at but again Claude is held back by it’s aggressive usage limits.
Score: 7 Votes (Like | Disagree)
14 months ago

I'm not sure I can speak to how well one model does vs another. But I've tried all of them (Gemini, ChatGPT and Claude) and the UI/UX that Antrhopic provides is hands down the best. I know that isn't what most people care about but I really like it. It makes it much easier to work with and create documents and keep track of versions.
Claude is still the overall best of the bunch. The lead has only grown with 4.5
Score: 4 Votes (Like | Disagree)
Earendil Avatar
13 months ago

Anthropic today introduced Claude Sonnet 4.5, which the company says is the "best coding model in the world,"
How is this related to Apple, or any Apple product? The article doesn’t attempt to tie it in at all, but also doesn’t say it’s a sponsored ad. I’m confused.

(yes, “AI” is popular, but music is popular and we don’t see articles on every music player update)
Score: 2 Votes (Like | Disagree)
14 months ago
"and Anthropic recommends that users upgrade."

Ah really! I thought they would recommend we don't upgrade. No **** sherlock!
Score: 2 Votes (Like | Disagree)
14 months ago
Just wait until macOS AI versions are released that are free from bugs.
Score: 2 Votes (Like | Disagree)
Latest Stories
MacRumors Giveaway: Win an Apple Watch Series 12 and a Nylon Band From Southern Straps
MacRumors Giveaway: Win an Apple Watch Series 12 and a Nylon Band From Southern Straps
30 minutes ago
First Apple TV 4K Now 'Vintage' Ahead of New Model Coming on Tuesday
First Apple TV 4K Now 'Vintage' Ahead of New Model Coming on Tuesday
1 hour ago
The MacRumors Show: Apple's Smart Home Products Are Coming
The MacRumors Show: Apple's Smart Home Products Are Coming
2 hours ago
Apple Shares Fall After News of iPhone 18 Pro Order Cuts
Apple Shares Fall After News of iPhone 18 Pro Order Cuts
2 hours ago
Leak Details iPhone Features for Apple's LG Home Accessories
Leak Details iPhone Features for Apple's LG Home Accessories
3 hours ago
Prime Day Leftover Deals: AirPods Max 2 for $429, Mac Mini for $779.99, and More
Prime Day Leftover Deals: AirPods Max 2 for $429, Mac Mini for $779.99, and More
3 hours ago
Every M5 MacBook Air Now $200 Off on Amazon
Every M5 MacBook Air Now $200 Off on Amazon
4 hours ago
Mac Shipments Fall, But Apple Still Gains Ground in Shrinking Market
Mac Shipments Fall, But Apple Still Gains Ground in Shrinking Market
5 hours ago
Apple Reportedly Cuts iPhone 18 Pro Orders After Price Hike Dampens Demand
Apple Reportedly Cuts iPhone 18 Pro Orders After Price Hike Dampens Demand
5 hours ago
Apple Signs Hiring and Licensing Deal With AI Podcast Startup Huxe
Apple Signs Hiring and Licensing Deal With AI Podcast Startup Huxe
9 hours ago
Apple's October 13 Launch: What's Coming
Apple's October 13 Launch: What's Coming
19 hours ago
Anthropic Says Users Can't Be Needlessly Cruel to Claude
Anthropic Says Users Can't Be Needlessly Cruel to Claude
20 hours ago
Apple to Launch Touchscreen OLED MacBook Pro and OLED iPad mini on October 27
Apple to Launch Touchscreen OLED MacBook Pro and OLED iPad mini on October 27
21 hours ago
Apple Now Pushing iPhone Users Still on iOS 26 to Install iOS 27
Apple Now Pushing iPhone Users Still on iOS 26 to Install iOS 27
22 hours ago
Apple Has a New M&A Chief as Ternus Reshuffles Leadership
Apple Has a New M&A Chief as Ternus Reshuffles Leadership
23 hours ago
Prepare for Apple's New Home Hub With These HomeKit Accessory Deals
Prepare for Apple's New Home Hub With These HomeKit Accessory Deals
23 hours ago
Tim Cook Says He's 'Not Meddling' With Apple's New CEO John Ternus
Tim Cook Says He's 'Not Meddling' With Apple's New CEO John Ternus
1 day ago
Tim Cook Explains Why He Stepped Down as Apple CEO Before iPhone Duo Launch
Tim Cook Explains Why He Stepped Down as Apple CEO Before iPhone Duo Launch
1 day ago
Apple Product Launch Announced for October 13: 'Welcome Home'
Apple Product Launch Announced for October 13: 'Welcome Home'
1 day ago
Amazon Unveils New iPad Rivals With Alexa+ and Google Play
Amazon Unveils New iPad Rivals With Alexa+ and Google Play
1 day ago
Missed Prime Day? You Can Still Score Big on Apple Devices Today
Missed Prime Day? You Can Still Score Big on Apple Devices Today
1 day ago
Apple's Cheapest 16-Inch MacBook Pro Just Got a Massive $563 Discount on Amazon
Apple's Cheapest 16-Inch MacBook Pro Just Got a Massive $563 Discount on Amazon
1 day ago
Apple Still Expected to Announce Three New Products on October 13
Apple Still Expected to Announce Three New Products on October 13
1 day ago
Leaker Jon Prosser Pushes Back as Apple Seeks His YouTube Data
Leaker Jon Prosser Pushes Back as Apple Seeks His YouTube Data
1 day ago
iPhone Air 2 Could Be as Thin as an Unfolded iPhone Duo
iPhone Air 2 Could Be as Thin as an Unfolded iPhone Duo
1 day ago
New iPad Mini Rumored to Have 60Hz OLED Display Ahead of Launch
New iPad Mini Rumored to Have 60Hz OLED Display Ahead of Launch
10 hours ago
Gurman: OLED MacBook Pro Won't Be 'Significantly Thinner'
Gurman: OLED MacBook Pro Won't Be 'Significantly Thinner'
9 hours ago
Microsoft Launches $2,599 Surface Laptop Ultra to Take on MacBook Pro
Microsoft Launches $2,599 Surface Laptop Ultra to Take on MacBook Pro
2 days ago
Google's SynthID AI Detector is Now Available to Everyone
Google's SynthID AI Detector is Now Available to Everyone
2 days ago
ChatGPT Gets GPT-6 and New Intelligent UI With Visual Answers
ChatGPT Gets GPT-6 and New Intelligent UI With Visual Answers
2 days ago