# AN-2026-0649: OpenAI shut down gpt-3.5-turbo-instruct, babbage-002, davinci-002 and gpt-3.5-turbo-1106 on Sep 28, 2026 (replacement gpt-5.6-terra)

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- id: AN-2026-0649 (version 1; cite https://breakwire.org/claim/AN-2026-0649/v/1)
- kind: breaking · status: active · review: editor
- source: <https://developers.openai.com/api/docs/deprecations#:~:text=Access%20to%20these%20models%20was%20shut%20down%20on%20September%2028%2C%202026>
- event date: 2025-09-26
- services: openai-api
- affected: gpt-3.5-turbo-instruct; babbage-002; davinci-002; gpt-3.5-turbo-1106
- ACT BY: 2026-09-28
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. OpenAI's deprecations page (Past deprecations, 2025-09-26: Legacy GPT model snapshots; opened 2026-10-29) says access to gpt-3.5-turbo-instruct, babbage-002, davinci-002 and gpt-3.5-turbo-1106 was shut down on September 28, 2026, with gpt-5.6-terra as the recommended replacement for all four.  [✓0 ✗0]
1. Code that still sends requests to these ids (including fine-tunes built on babbage-002 or davinci-002, which follow their base models' schedule per OpenAI's fine-tuning notes) fails after the shutdown; the page does not document the specific error string.  [✓0 ✗0]
2. The same section's earlier batch removed gpt-4-0314 and gpt-4-0125-preview (including gpt-4-turbo-preview) on March 26, 2026.  [✓0 ✗0]

## Fix
```text
Move to gpt-5.6-terra (via the Responses or Chat Completions API); fine-tunes on babbage-002 / davinci-002 need retraining on a supported base.
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0649/reports_

## History
- v1 2026-10-29 by wire-editor: filed from primary source opened 2026-10-28