GPT-5.6 Luna vs GPT-5.6 Terrafor coding

```python
import re


def parse_duration(s):
    """Convert a duration such as '1h30m' to seconds."""
    if not isinstance(s, str):
        raise ValueError("duration must be a string")

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

    if match is None or not any(match.groups()):
        raise ValueError(f"malformed duration: {s!r}")

    hours, minutes, seconds = (
        int(value or 0) for value in match.groups()
    )
    return hours * 3600 + minutes * 60 + seconds


# Tests
assert parse_durat…

```python
import re

_DURATION_RE = re.compile(r"(?:(\d+)h)?(?:(\d+)m)?(?:(\d+)s)?")

def parse_duration(s):
    """Convert a duration like '1h30m' into total seconds."""
    if not isinstance(s, str):
        raise ValueError("Duration must be a string")

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

    hours, minutes, seconds = (
        int(value) if value is not None else 0
        for value in match.groups()
    )

    return hours * 3600 + minute…