fix(docs): improve classify_intent reliability and draft logging #1721
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- Switch model from gpt-4 to gpt-5-nano because gpt-4 could not reliably return valid JSON, causing classify_intent to fail.
- Update logging to avoid printing draft_response before it exists, which previously caused an error in:
print(f"Draft ready for review: {result['draft_response'][:100]}...")
yanglikun
commented
Dec 4, 2025
| result = app.invoke(initial_state, config) | ||
| # The graph will pause at human_review | ||
| print(f"Draft ready for review: {result['draft_response'][:100]}...") | ||
| print(f"human review interrupt:{result['__interrupt__']}") |
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Update logging to avoid printing draft_response before it exists, which previously caused an error in:
print(f"Draft ready for review: {result['draft_response'][:100]}...")
yanglikun
commented
Dec 4, 2025
| from langchain.messages import HumanMessage | ||
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| llm = ChatOpenAI(model="gpt-4") | ||
| llm = ChatOpenAI(model="gpt-5-nano") |
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gpt-4 could not reliably return valid JSON, causing classify_intent to fail.
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print(f"Draft ready for review: {result['draft_response'][:100]}...")
Overview
This PR updates the example to use
gpt-5-nanoinstead ofgpt-4for theclassify_intentstep and fixes a logging statement that could raise an exception whendraft_responseis not yet available.Type of change
Type: Update existing documentation
Related issues/PRs
Checklist
docs devsrc/docs.jsonif needed(Internal team members only / optional): Create a preview deployment as necessary using the [Create Preview Branch workflow](https://github.com/langchain-ai/docs/actions/workflows/create-preview-branch.yml)
Additional notes
gpt-5-nanoensures structured JSON output for theclassify_intentnode.draft_responseis missing.