Yesterday I got this email: [Screen Shot 2023-09-29 at 6.52.23 PM] Why the extremely sudden deprecation? Will there be an endpoint which returns log-probabilities of an inputted completion given an inputted prompt? Maybe also see this tweet by the guy who created GitHub Copilot

Why will gpt-3.5-turbo-instruct no longer support echo=true and logprobs=1?

Topic		Replies	Views
You Are Not Allowed To Request Logprobs From This Model: gpt-5-chat-latest API gpt-5	1	656	August 10, 2025
GPT-4.5-preview model will be removed from the API on 2025-07-14 Deprecations	23	12648	August 13, 2025
Logprobs deprecated for gpt-5 models? Deprecations	1	2097	September 2, 2025
Get logprobs for prompt tokens, not just for completion? API logprobs	3	2239	January 20, 2026
Who is still using Codex? API codex	43	12891	January 20, 2026