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[BugFix][gpt-oss] Fix Chat Completion with Multiple Output Message #23318

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Merged
merged 2 commits into from
Aug 21, 2025
Merged

[BugFix][gpt-oss] Fix Chat Completion with Multiple Output Message #23318

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4283f52
fix
heheda12345 Aug 21, 2025
e9e5d5c
fix
heheda12345 Aug 21, 2025
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14 changes: 5 additions & 9 deletions vllm/entrypoints/harmony_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -329,23 +329,19 @@ def parse_chat_output(
token_ids: Sequence[int]) -> tuple[Optional[str], Optional[str], bool]:
parser = parse_output_into_messages(token_ids)
output_msgs = parser.messages
is_tool_call = False # TODO: update this when tool call is supported
if len(output_msgs) == 0:
# The generation has stopped during reasoning.
is_tool_call = False
reasoning_content = parser.current_content
final_content = None
elif len(output_msgs) == 1:
# The generation has stopped during final message.
is_tool_call = False
reasoning_content = output_msgs[0].content[0].text
final_content = parser.current_content
else:
if len(output_msgs) != 2:
raise ValueError(
"Expected 2 output messages (reasoning and final), "
f"but got {len(output_msgs)}.")
reasoning_msg, final_msg = output_msgs
reasoning_content = reasoning_msg.content[0].text
reasoning_msg = output_msgs[:-1]
final_msg = output_msgs[-1]
reasoning_content = "\n".join(
[msg.content[0].text for msg in reasoning_msg])
final_content = final_msg.content[0].text
is_tool_call = final_msg.recipient is not None
return reasoning_content, final_content, is_tool_call