[BUG]Claude Code starts but is unresponsive

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Hi Anthropic support,

Claude Code hangs on every prompt and never produces a response. The
client retries 10 times then gives up. This happens on a brand new
session with no project context, on the prompt "hi".

Account email: kenritley@proton.me
Plan: Claude Max
Platform: macOS, MacBook Pro (Apple Silicon)
Shell: zsh

Versions I have tested, all show the same hang:

• 2.1.128 (originally installed via Homebrew cask, my starting state)
• 2.1.120 (installed via npm after brew uninstall)
• 2.1.141 (auto-updated by npm to latest)

Things I have already tried, none of which resolved the issue:

• Restarting the terminal (both iTerm2 and macOS Terminal)
• Forcing IPv4 via NODE_OPTIONS="--dns-result-order=ipv4first"
• Clearing ~/.claude entirely and re-authenticating
• Logging out with /logout and logging back in
• Switching models (Opus 4.7 to Sonnet 4.6)
• Print mode (claude -p "hello") also hangs
• Resumed sessions also hang
• No stray ANTHROPIC_API_KEY in environment (verified with env | grep -i anthropic)
• Only one install of claude on PATH, located at

/Users/kenritley/.nvm/versions/node/v25.9.0/bin/claude

Network and API path are verified healthy. From the same machine:

• curl -v https://api.anthropic.com/v1/messages completes the TLS

handshake and returns HTTP/2 405 in milliseconds.

• curl -X POST against the same endpoint returns HTTP 401 in 200ms

(expected, since an OAuth token cannot auth as an api key).

• claude.ai works fine from the same machine and same network.

Status page (status.claude.com) shows no incidents for May 14, 2026.
Yesterday's incidents (May 13) were marked resolved before this
problem began.

The issue started Wednesday evening (May 13) around 22:00 Swiss time,
after a routine "brew upgrade claude-code" earlier the same day.
However, downgrading the client did not resolve it, so the upgrade
itself does not appear to be the cause.

This suggests the issue may be specific to my account at the service
level, since my network, API path, and client install all appear
healthy. I would appreciate if you could check from your end whether
there are any session locks, rate limit states, or account-level
issues that might be causing requests from this account to hang.

Thank you,
Dr. Ken Ritley

What Should Happen?

See above

Error Messages/Logs

Steps to Reproduce

See above

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.141 (Claude Code)

Claude Code Version

2.1.141 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_