gpt-4-turbo shutdown window
officially replaced by Sol
The official table says October 23, 2026 shuts gpt-4-turbo (and gpt-4-turbo-2024-04-09 aliases), recommended gpt-5.6-sol. gpt-3.5-turbo and gpt-4 die the same day with terra and Sol respectively. Officially announced, not a rumor. Sol has real QCode usage. Official list $4 / $20 (promo through at least 2026-11-21).
Updated 2026-09-11
Four separate facts
Chat-wave shutdown day
Table: October 23, 2026 gpt-4-turbo | gpt-4-turbo-2024-04-09, gpt-4-turbo-completions → gpt-5.6-sol.
Replacement for turbo / gpt-4
gpt-4 and gpt-4-turbo rows point at gpt-5.6-sol. gpt-3.5-turbo that day points at gpt-5.6-terra. Do not remap every old id to one name.
“They will slip 10-23”
Forums guess another delay. The table prints October 23, 2026. Until it changes, a slip is a rumor.
When resellers 404
The table governs first-party API. QCode’s error day is unpublished. Finish before 10-23.
How to handle dated chat-id shutdowns
Grep gpt-4-turbo, gpt-4, gpt-3.5-turbo. Follow the replacement column, not memory. One tiny request. QCode can honestly land Sol / terra that have usage — not life support for turbo.
What the 2026-10-23 section looks like
Fetched 2026-09-11: October 23, 2026 lists gpt-4-turbo → gpt-5.6-sol, gpt-4-0613 / gpt-4 → gpt-5.6-sol, gpt-3.5-turbo-0125 / gpt-3.5-turbo → gpt-5.6-terra. Not the same section as the 09-28 instruct wave.
Timeline
Notice section for this wave. Shutdown pointed at 2026-10-23.
Re-fetch: 10-23 rows still there, turbo still → Sol. 2026-09-11
Shutdown date on the table. Slip unpublished. Production finishes before this day. 2026-10-23
Three evidence tiers
Officially announced / confirmed
Officially confirmed: 2026-10-23 shuts gpt-4-turbo and listed aliases, recommended gpt-5.6-sol; the same day gpt-3.5-turbo recommends gpt-5.6-terra. Deprecations table, not a forum.
Rumor / what the community is saying
Rumor: 10-23 will slip. The table does not say that. Treating “maybe delayed” as the plan promotes a rumor to officially announced. Unpublished: the reseller 404 day. 2026-09-11 That delay is unconfirmed; there is no official slip date.
turbo → Sol versus 3.5 → terra
gpt-4-turbo / gpt-4 → Sol
The table names gpt-5.6-sol. Official Sol $4 / $20 (through at least 2026-11-21).
gpt-3.5-turbo → terra
A different row the same day. Do not silently remap 3.5-turbo to Sol.
Three steps in the window
Open the table, copy 10-23 rows. Grep gpt-4-turbo and gpt-4. model=gpt-5.6-sol, tiny request 200. 3.5-turbo follows the terra row.
What to do on QCode
Sol and terra both have usage. Copy the key. Base URL https://api.qcode.cc . Replace gpt-4-turbo with gpt-5.6-sol (official $4 / $20, promo through at least 2026-11-21). Next step: non-streaming tiny request, echoed model.
FAQ
Is 10-23 officially confirmed?
Yes. The deprecations table officially announces October 23, 2026 and the replacement column.
Will they delay?
The table does not say so. Until it changes, delay is a rumor.
Remap every old GPT to Sol?
No. gpt-3.5-turbo’s row is terra. Read the table.
Same as the 09-28 instruct wave?
No. 09-28 is Completions-era ids. 10-23 is the chat wave.
When will QCode 404 old ids?
Unpublished. Finish before the official day.
What is Sol’s price now?
Official pricing page $4 / $20, promo through at least 2026-11-21.
Sources
October 23, 2026 rows: developers.openai.com/api/docs/deprecations (2026-09-11). Sol $4 / $20: official pricing page through at least 2026-11-21. Usage: internal CRS.
Move turbo to Sol before 10-23
One key for gpt-5.6-sol and gpt-5.6-terra. No turbo life support. From ¥60/month.
Related
09-28 Completions-era ids
The earlier wave, instruct → terra.
Sol vs Sonnet 5
Daily comparison after you land on Sol.
OpenAI API triage
A shutdown 404 is not a transient 5xx.
Tracks an officially announced shutdown. A rumored delay is not official confirmation. Deprecations win.