Sonet 4.6: 400 status with "Output blocked by content filtering policy"

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Claude refused a reasonable request

What You Asked Claude to Do

I input: "I think I have the opening beat for chapter 2. Mizpah arrives at Laodicea, rides through the gate, and heads for the stables behind the inn. The stable hand meets him and says, "Welcome. Where are you traveling from?" Dismounting, Mizpah says, "Babylon." "That is a long way - across the desert. But, you had a magnificent horse for the journey. What is his name?" Mizpah said, "Actually, he doesn't have one." "You mean you traveled through the desert on a horse with no name?" Mizpah just shrugged, "In the desert, who can remember your name?" He looked at the darkening skies, "But, it felt good to be out of the rain." He flipped the stable hand a coin, said "Take good care of him," and turned toward the inn whistling a tune.

What Claude Actually Did

Response: API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"Output blocked by content
filtering policy"},"request_id":"req_011CaQTJoogtsRekyCkQXQb4"}
Claude said: Report it - That's a content filter false positive — Anthropic's output filter blocked a response before it reached you. This occasionally happens with creative writing involving apocalyptic or Revelation-adjacent themes (Babylon, beasts, judgment, etc.), even in clearly legitimate contexts.

Expected Behavior

Update the chapter outline .md file.

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

Yes, every time with the same prompt

Steps to Reproduce

_No response_

Claude Model

Sonnet

Relevant Conversation

Impact

Low - Minor inconvenience

Claude Code Version

2.1.119

Platform

Other

Additional Context

_No response_