Anthropic just shocked the world with their incredible new Claude 4.5 Sonnet model and people are going crazy.
You absolutely cannot ignore this.
They are loudly calling it the best coding model in the world and so many devs who are trying it out completely agree.
Can you believe this? 👇
30+ freaking hours of pure autonomous coding — nowhere on earth has this ever been seen before.
Even the Claude team themselves were shocked beyond belief — "resetting our expectations"😏…
I mean just see the sheer difference between Claude Sonnet 3.7 vs 4.0 vs 4.5 for yourself:
Claude 3.7:
Claude 4.0
And now the beast — 4.5:
Oh yes — Sonnet 4.5 is built from the ground up for real, sustained coding and agent workflows — the kind of long, messy jobs that used to be too complex for AI to handle without constant prompting babysitting.
When Claude 4 came out it was wowing us with 90+ minutes of uninterrupted coding — now what do we say about this.
It's just such a huge huge leap.
You can just assign it a massive batch of features to implement and run off without a care in the world. It will do everything.
When you come back and see the amazing results you will be both awed and scared about the future of your job.
Look this model literally cranked out an 11,000-line app — complete with planning, implementation, and debugging — without being spoon-fed every step — any step:
11,000 lines!
Oh and then we still have these high-and-mighty individuals smugly looking down on anything to do with AI coding.
With 4.5 Claude has gotten even better at automating tasks on your PC — Computer Use.
Approximately 200% better — sometime I find pretty hard to dispute after seeing this incredible Chrome usage demo — it's just too good:
Manage files, fill out forms, handle spreadsheets and email… the possibilities are endless. The reliability is gold.
For day-to-day coding, Sonnet 4.5 is the difference between asking an intern for edits and having a brilliant teammate who ships real features.
Instead of "change this one file", you can now hand it a full GitHub issue — or a dozen — bug fixes, test expansion, documentation polish — and expect a proper pull request at the end.
It's also showing stronger planning and comprehension, which matters when you're touching dozens of files. If you've ever dreaded the chaos of updating SDKs across services or refactoring auth logic everywhere, you can see why this matters.
Edits are becoming more reliable too.
Early testers note fewer brittle changes and more coherent patches across entire repos. That's exactly what makes it feel safe to delegate bigger jobs.
You don't have to wait long to get your hands on it:
- GitHub Copilot is already rolling out Claude 4.5 Sonnet to Pro, Business, and Enterprise plans.
- AWS Bedrock offers it as the newest Anthropic option for coding and agent-heavy use cases.
- Third-party tools like Augment Code have already made it their default model for collaborative development.
Whenever you try it, you will most certainly feel the effects of the massive upgrades.
Claude 4.5 Sonnet is a real turning point. We've really gone from autocomplete helpers to agents that can stick with a project for days and actually deliver working software.
This is surely going to make a mark.
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