Woah this is incredible.
Anthropic just released the new Claude Opus 4.5 -- and it's better than every other coding model at basically everything.
Just look at the insane difference between Opus 4.5 and Sonnet 4.5 in solving this complex puzzle game:
Many devs online have been calling it the greatest coding model ever -- not hard to believe when you see how it stacks up to the other models:
It even beats Gemini 3 Pro that just came out like a week ago:
This is a model built from the ground up to be an agentic software engineer: fixing bugs, refactoring large codebases, navigating unfamiliar repos, and wiring everything together with tools and terminals.
Opus 4.5 isn’t just competitive — it’s designed to be the thing you reach for when failure is expensive.
80% on the SWE-bench verified benchmark is the highest ever any model has ever gotten.
And this SWE-bench Verified is a benchmark where models must actually apply patches that pass tests in real GitHub repos. It's the sort of test where you’re not answering quiz questions -- you’re actually modifying real-world Python projects and passing every single written test in the codebase.
Anthropic also ran it on their two-hour engineering hiring exam and reported that Opus 4.5, under realistic constraints, scored higher than any human candidate they’ve evaluated -- though with the important caveat that it was allowed multiple runs and they picked the best.
You can see that Opus 4.5 is optimized for “here’s a repo, make it work,” not just “explain what a binary search tree is.”
This is advanced software engineering for messy real-world tasks -- far more than just "build a todo list app".
The effort knob: turning up (or down) the brainpower
The most interesting feature for coders is the effort parameter -- exclusive to Opus 4.5 for now.
Instead of swapping between…
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