unexpected status 404 Not Found: Model not found gpt-5.6-luna, url: https: chatgpt .com/backend-api/codex/responses, cf-ray: a18af4281d3b68b9-DFW, request id: 58c00c2c-1e97-426a-bc97-1162aaee3a3b
Anyone else having a hard time using Luna?
As you can see I was trying to switch to luna to help prime context before then switching back to a heavier model - I’ve found this helps in almost all systems as gathering context from documentation is not a heavy task.
Hi @kst.biz,
Yeah, I can see how frustrating it is to get an unexpected 404 Model not found error when trying to switch to gpt-5.6-luna.
Could you please try these basic troubleshooting steps first?
- Clear your browser cache and cookies.
- Try using an incognito/private browsing window.
- Temporarily disable browser extensions, especially privacy or security-related ones.
- Turn off any VPN or secure DNS tools such as Web Protect.
- Switch to a different network, if possible.
After trying these, please let us know whether the issue is still happening.
If it continues, please share the result here so we can investigate further.
—AJ
