MiniMax M2.x reasons inside <think> tags in the normal content field, and
that reasoning is billed against max_tokens. At 4096 the heavier batches
spent the entire budget thinking, were truncated before writing a single
answer, and stripThinking correctly removed the unclosed block — leaving an
empty response.
The signature was distinctive: batches returned 25/25 or 0/25, never
anything partial. 193 of 779 commits went unsummarised with no error
anywhere. At 16384 the same 193 completed 8/8 batches with zero failures.
The interview's question call had the same bug at 1024, where it would have
returned an empty question and silently ended the interview on the first
turn. Now 8192.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
