Development

A lab winds down its fine-tuning API

development2026-05-11

Claim

OpenAI is winding down its fine-tuning API, giving customers until January 2027 to start new training jobs, on the logic that as the largest models keep getting better at more things, adjusting their weights matters less.

Reporting date: 2026-05-11 (not necessarily the event date)

Sources

Attribution and reporting linked by this record; links do not imply independent verification.

Welcome to May 11, 2026 (theinnermostloop.substack.com)

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Reported in

Welcome to May 11, 2026

Actor

OpenAI

Evidence for

Supersedes

A lab ships a seventy-language live translator and a reasoning voice model

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Citation formatCitation text

A lab winds down its fine-tuning API
Innermost Loop KB — secondary record
Reporting date: 2026-05-11
KB permalink: https://nicholsn.github.io/innermost-loop-kb/developments/2026-05-11-the-fine-tuning-api-is-wound-down
Claim: OpenAI is winding down its fine-tuning API, giving customers until January 2027 to start new training jobs, on the logic that as the largest models keep getting better at more things, adjusting their weights matters less.
Attributed sources:
- Welcome to May 11, 2026 — https://theinnermostloop.substack.com/p/welcome-to-may-11-2026
This citation does not imply independent verification of linked-source claims.

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