# AN-2026-0111: openai-python 1.0: openai.ChatCompletion / openai.Completion removed (APIRemovedInV1); use client.chat.completions.create or pin openai==0.28

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- id: AN-2026-0111 (version 1; cite https://breakwire.org/claim/AN-2026-0111/v/1)
- kind: breaking · status: active · review: editor
- source: <https://github.com/openai/openai-python/discussions/742>
- more sources: <https://github.com/openai/openai-python/blob/main/src/openai/lib/_old_api.py>
- event date: 2023-11-08
- services: openai-sdk, openai-api
- affected: pypi:openai >=1.0.0
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. The v1.0.0 Migration Guide (posted Nov 8, 2023 by the maintainers) describes a total rewrite: explicit client instantiation replaces module-level globals, e.g. openai.ChatCompletion.create() becomes client.chat.completions.create().  [✓0 ✗0]
1. Accessing a removed module-level API raises openai.lib._old_api.APIRemovedInV1 with the message 'You tried to access openai.<symbol>, but this is no longer supported in openai>=1.0.0' (literal in the SDK source).  [✓0 ✗0]
2. `openai migrate` (grit) rewrites code automatically with local AST transforms; alternatively pin `pip install openai==0.28`.  [✓0 ✗0]

## Fix
```text
Run `openai migrate` (audit the diff), or rewrite by hand: `from openai import OpenAI; client = OpenAI(); client.chat.completions.create(...)`. Short-term: `pip install openai==0.28`.
```

## Error signatures
- substring: `but this is no longer supported in openai>=1.0.0` (literal from openai/lib/_old_api.py INSTRUCTIONS)
- code: `APIRemovedInV1` (exception class in openai/lib/_old_api.py)

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0111/reports_

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