"gpt-6-astra" has been staged on the OpenAI API https://x.com/synthwavedd/status/2095184148981842161

The OpenAI Responses API now returns a 404 Not Found for "gpt-6-astra", where garbage/actually non-existent slugs return 400s - a 404 is also returned for 5.6 Cyber, which we know exists.