A stream stops before the answer finishes
Output is cut off mid-sentence with no error.
Symptom
Streamed text stops partway and the run reports success.
Why it happens
Check finishReason first. .length means the response hit
maxOutputTokens and stopped there, which is not an error as far as the API is
concerned.
Reasoning models make this more likely, because thinking tokens count toward the same budget as the answer.
Fix
Raise maxOutputTokens. The SDK default is deliberately small, and reasoning
models need real headroom.
If finishReason is .stop and the text still looks truncated, the model
genuinely ended there and the fix is in the prompt.