GPT-5.5 vs Kimi K3for coding

```python
import re

def parse_duration(s):
    """
    Convert a duration string like '1h30m', '45s', '2h', '90m',
    or '1h2m3s' into total seconds.

    Raises ValueError if the input is malformed.
    """
    if not isinstance(s, str):
        raise ValueError("duration must be a string")

    match = re.fullmatch(r"(?:(\d+)h)?(?:(\d+)m)?(?:(\d+)s)?", s)

    if not match or not any(match.groups()):
        raise ValueError(f"malformed duration: {s!r}")

    hours, minutes, seconds = match.groups()

    return (
        int(hours or 0) * 3…

```python
import re

_FACTORS = {'h': 3600, 'm': 60, 's': 1}

def parse_duration(s):
    """Convert a duration like '1h30m' or '45s' into total seconds.

    Raises ValueError if the string isn't one or more <digits><unit> pairs.
    """
    if not isinstance(s, str) or not re.fullmatch(r'(?:\d+[hms])+', s):
        raise ValueError(f"malformed duration: {s!r}")
    return sum(int(num) * _FACTORS[unit]
               for num, unit in re.findall(r'(\d+)([hms])', s))


# Tests
assert parse_duration('1h2m3s') == 3723   # 3600 + 120 + 3
assert pars…