Summary
On August 10, 2026 OpenAI shut down the gpt-5.2-chat-latest and gpt-5.3-chat-latest models in its API, directing developers to migrate to gpt-5.6-sol. The retirement is part of a rolling 2026 deprecation cadence that has also pruned older Codex and chat-latest endpoints.
What changed
OpenAI removed gpt-5.2-chat-latest and gpt-5.3-chat-latest from the API effective August 10, 2026, and recommends gpt-5.6-sol as the replacement. Applications still calling the retired model aliases must migrate to avoid breakage.
Why it matters
The chat-latest aliases are convenience pointers many apps and agents pin to, so retiring them forces migration work and can silently break production integrations that did not track the deprecation. It underscores how fast OpenAI is rotating its model lineup and why teams building on hosted models need deprecation monitoring and version pinning in their release process.
Evidence excerpt
OpenAI will remove gpt-5.2-chat-latest and gpt-5.3-chat-latest from the API on August 10, 2026, and recommends gpt-5.6-sol as the replacement.