Is claude-sonnet-5-high good at Coding?
claude-sonnet-5-high ranks #1 of 55 for Coding — excellent.
claude-sonnet-5-high on each Coding sub-task
| Refactoring | 100.0/100 | #1 |
| Code Review & Security | 100.0/100 | #1 |
| Bug Fixing | 99.6/100 | #3 |
| Secure Implementation | 98.0/100 | #19 |
| Code Quality and Testing Test | 92.2/100 | #3 |
| Code Review and Risk Test | 85.0/100 | #1 |
| API and Data Code Test | 71.4/100 | #17 |
Real examples, graded
WinOff-by-one in a slice helper 100/100
“The model perfectly diagnoses the root cause, provides the minimal fix, and excellently handles the edge cases (n=0, n>len) in a bonus section, demonstrating a deep understanding of Python's slicing mechanics.”
WinFix off-by-one Python bug 100/100
“The model provides a perfectly correct and robust fix for the off-by-one error. It handles all edge cases (n=0, negative n, n > length) without changing the public API. The explanation is clear, and the unit tests are comprehensive.”
WinJavaScript debounce implementation 100/100
“The provided solution is an excellent, robust implementation of a debounce function in JavaScript. It correctly manages the timer, preserves the `this` context and arguments of the latest call, and includes both `cancel` and `flush` functionalities. It also properly clears references to avoid memory leaks. The explanation and tests are clear, accurate, and directly address the requirements.”
WeakOff-by-one in a slice helper 100/100
“The model perfectly diagnoses the root cause and provides a minimal fix. Furthermore, it correctly identifies a subtle edge case with `n=0` when using negative indexing and provides an idiomatic solution that handles it flawlessly.”
WeakFix off-by-one Python bug 98/100
“The model successfully invents a plausible scenario (since none was provided), correctly diagnoses the off-by-one root cause in Python slicing, and provides a working fix with tests and explanations.”
WeakJavaScript debounce implementation 98/100
“The implementation is correct, handles edge cases (like preserving 'this' and arguments), and correctly implements the requested cancel functionality. It includes slight scope creep by adding 'flush' and 'immediate' execution, but these are standard features of a robust debounce function (e.g., Lodash) and do not detract from the quality of the answer.”
Frequently asked
Is claude-sonnet-5-high good at Coding?
claude-sonnet-5-high ranks #1 of 55 models we tested for Coding, scoring excellent.
What is claude-sonnet-5-high's strongest Coding skill?
Its best sub-task here is Refactoring.
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Prompt × model results
12 test cases · 3 evals