OpenAI reports four legacy model IDs shut down September 28
OpenAI reports that access to gpt-3.5-turbo-instruct, babbage-002, davinci-002 and gpt-3.5-turbo-1106 was shut down on September 28, 2026. Its deprecation table names gpt-5.6-terra as the replacement. Kingy has not tested current runtime availability.
Required action
Check configuration for the four exact IDs. Validate the endpoint, request format, output behavior and cost of a migration; do not assume drop-in compatibility with legacy Completions.
Scope and evidence limits
OpenAI API; no regional exception documented
OpenAI reports the four IDs were shut down on September 28, 2026. Kingy has not independently tested runtime availability; replacement may require endpoint and request changes.
not_tested
Official sources
Affected components
gpt-3.5-turbo-instruct, babbage-002, davinci-002, gpt-3.5-turbo-1106
Affected users
Developers whose OpenAI API integrations depend on these exact retiring IDs or API surface.
Migration guidance
Evaluate gpt-5.6-terra, the replacement named by OpenAI, and test the endpoint, request format, behavior and cost for the affected workload.
Correction history
- 2026-10-01 source review: September 28 date passed. Preserve exact IDs/date/Terra replacement and runtime/endpoint caveats; remove stale upcoming language. Previous guidance: OpenAI’s deprecation table lists September 28 removal for these four exact IDs and names gpt-5.6-terra as the replacement. Action: Find these IDs in deployed configuration. Validate endpoint, request format, output behavior and cost for a Terra migration; do not treat it as a drop-in legacy Completions replacement.
- 2026-10-28 source review: OpenAI’s current deprecation notice reports shutdown on September 28 for all four IDs. Earlier guidance said the date had passed and service state was unconfirmed. Preserve that history and the distinction between the vendor report and Kingy runtime testing.