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Anthropic Debuts Claude Sonnet 4.5 With Improved Coding

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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.

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Top Rated Comments

S
Saturn1217
9 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
krspkbl
9 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)
G
Good User Name
9 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
Earendil
9 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)
R
ryanthom100
9 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)
C
Corefile
9 months ago
Just wait until macOS AI versions are released that are free from bugs.
Score: 2 Votes (Like | Disagree)
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