gpt-4-turbo retirement date 2026-10-23
official substitute gpt-5.6-sol
As of 2026-10-26, the 2026-04-22 section of OpenAI's deprecations page is in the past tense: “Access to these models was shut down on October 23, 2026.” gpt-4-turbo (the same cell names gpt-4-turbo-2024-04-09 and gpt-4-turbo-completions) still lists gpt-5.6-sol as the substitute. The same day gpt-4 / gpt-4-0613 moved to gpt-5.6-sol and gpt-3.5-turbo / gpt-3.5-turbo-0125 to gpt-5.6-terra. Both substitutes can be called through QCode.
Updated 2026-10-26
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Four separate facts
Chat-wave shutdown day
Official table, 2026-04-22 section: October 23, 2026 | gpt-4-turbo | gpt-4-turbo-2024-04-09, gpt-4-turbo-completions | gpt-5.6-sol; the 2026-10-26 copy says was shut down.
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.
gpt-4o-2024-05-13 and ft-gpt-4
gpt-4o-2024-05-13 also shut down on October 23, 2026, substitute gpt-5.6-sol. The fine-tuned entry ft-gpt-4 was removed the same day with gpt-5.6-sol as the recommended base model; ft-gpt-3.5-turbo maps to gpt-5.6-terra.
The wording now
The table governs OpenAI's own API. Fetched 2026-10-26: the section now sits under Past deprecations and says was shut down; the date is still 2026-10-23 (October 23, 2026 in the original) and the substitutes are unchanged.
How to handle dated chat-id shutdowns
As of 2026-10-26 the official table says these old ids were shut down on 2026-10-23. If anything still calls them, the method is unchanged: grep gpt-4-turbo, gpt-4, gpt-3.5-turbo and their aliases, follow the Substitute model column row by row, and do not remap everything to Sol from memory. Then send one tiny request and confirm the echoed model is the new id. Through QCode you can call the substitutes the table names, gpt-5.6-sol and gpt-5.6-terra; for the status of an old id on QCode, /models is the reference.
Fetched 2026-10-26: the 2026-10-23 section is in the past tense
The deprecations page fetched on 2026-10-26, section 2026-04-22: Legacy GPT model snapshots, now says “Access to these models was shut down on October 23, 2026” instead of will be shut down. Its October 23, 2026 chat rows: gpt-4-turbo (same cell: gpt-4-turbo-2024-04-09, gpt-4-turbo-completions) → gpt-5.6-sol; gpt-4-0613 (gpt-4, gpt-4-0613-completions, gpt-4-completions) → gpt-5.6-sol; gpt-3.5-turbo-0125 (gpt-3.5-turbo, gpt-3.5-turbo-completions) → gpt-5.6-terra; gpt-4o-2024-05-13 → gpt-5.6-sol. Next on the schedule: on 2026-12-11 older GPT-5 and o3 snapshots such as gpt-5-2025-08-07 and o3-2025-04-16 shut down, both onto gpt-5.6-sol (notice of 2026-06-11). On 2027-04-01 gpt-5.3-codex and gpt-5.1 go to gpt-6-sol and gpt-5.4-nano to gpt-6-luna, announced 2026-10-01 with six months' notice.
Timeline
The 2026-04-22: Legacy GPT model snapshots section of the table; this wave's shutdown date reads October 23, 2026.
Re-checked 2026-10-26: the section sits under Past deprecations and says was shut down; the gpt-4-turbo, gpt-4 and gpt-3.5-turbo rows keep October 23, 2026 and the same substitutes.
The shutdown date on the table has passed. OpenAI now describes these ids with was shut down; if production still sends requests to an old id, move it to the substitute.
Three evidence tiers
Officially announced / confirmed
Verifiable word for word on 2026-10-26: the 2026-04-22 section has the columns Shutdown date / Model snapshot / Substitute model and says “Access to these models was shut down on October 23, 2026”; gpt-4-turbo and the aliases in its cell, gpt-4-0613 / gpt-4 → gpt-5.6-sol; gpt-3.5-turbo-0125 / gpt-3.5-turbo → gpt-5.6-terra; ft-gpt-4 → gpt-5.6-sol and ft-gpt-3.5-turbo → gpt-5.6-terra. OpenAI's definition: at the time of the shut down, the model or endpoint is no longer accessible.
Unpublished / caution
First, the table now lists this section under Past deprecations and the text says was shut down (checked 2026-10-26; shutdown date 2026-10-23); there is no rescheduling wording. Second, OpenAI only says some developers may provision dedicated capacity after the 2026-10-23 shutdown date through sales, which is not a general extension. Third, the status of old ids on QCode is whatever /models shows. Fourth, the table maps ids only; whether a substitute behaves the same is yours to test.
turbo → Sol versus 3.5 → terra
gpt-4-turbo / gpt-4 → Sol
The table names gpt-5.6-sol for gpt-4-turbo, gpt-4 and gpt-4o-2024-05-13. On QCode billing is per token; unit prices for each model are on /models.
gpt-3.5-turbo → terra
A different row the same day. Do not silently remap 3.5-turbo to Sol.
Three steps before the shutdown date
① Search: grep code, environment variables and SDK defaults for gpt-4-turbo, gpt-4-turbo-2024-04-09, gpt-4-turbo-completions, gpt-4, gpt-4-0613, gpt-3.5-turbo and gpt-3.5-turbo-0125, aliases and snapshots together. ② Change: set model per the substitute column, gpt-4-turbo and gpt-4 to gpt-5.6-sol, gpt-3.5-turbo to gpt-5.6-terra. ③ Verify: send one non-streaming tiny request and confirm the response reports the new model id.
What to do on QCode
As of 2026-10-26 the official table says gpt-4-turbo and the other old ids were shut down on 2026-10-23. gpt-5.6-sol and gpt-5.6-terra can be called through QCode, billed per token; unit prices for each model are on /models. Per the QCode docs page on endpoints and API formats: the OpenAI Python/JS SDK base_url is https://api.qcode.cc/openai/v1 (requests go to /openai/v1/chat/completions); Codex CLI uses base_url https://api.qcode.cc/openai (requests go to /openai/v1/responses). GPT models use these two OpenAI endpoints only, not the Anthropic endpoint. After switching model from gpt-4-turbo to gpt-5.6-sol, send one non-streaming tiny request and check the echoed model. To try the replacement for a few days first: Not ready for a monthly plan? Pay-as-you-go Packs start at $4 for a one-time quota you use within 7 days; if you already have a Personal Plan, add a booster pack when you need more quota.
FAQ
Has the 10-23 shutdown happened?
Yes. As of 2026-10-26 the deprecations page states in the past tense that these models were shut down on 2026-10-23, and the section now sits under Past deprecations.
Can I still get access after the shutdown?
OpenAI writes that some developers may provision dedicated capacity after the 2026-10-23 shutdown date through its sales team; that is not a general extension, and there is no rescheduling wording (checked 2026-10-26).
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.
What is the status of the old ids on QCode now?
OpenAI's table says these ids were shut down on 2026-10-23; the status of old ids on QCode is whatever /models shows. Move any remaining calls to the substitute.
Does gpt-4o-2024-05-13 also shut down on 10-23?
Yes, it was shut down on 2026-10-23. It sits in the same October 23, 2026 table with gpt-5.6-sol as substitute. The fine-tuned entries ft-gpt-4 (→ gpt-5.6-sol) and ft-gpt-3.5-turbo (→ gpt-5.6-terra) were removed the same day.
Sources
Shutdown dates and substitutes: OpenAI deprecations page https://developers.openai.com/api/docs/deprecations (sections 2026-04-22, 2026-06-11 and 2026-10-01, fetched 2026-10-26; the copy now uses was shut down). Integration settings: the QCode docs page on endpoints and API formats at docs.qcode.cc (fetched 2026-10-26). OpenAI writes dates as October 23, 2026; this page renders them as ISO.
gpt-4-turbo was shut down on 2026-10-23: move traffic to gpt-5.6-sol
OpenAI's table says the old ids were shut down on 2026-10-23; gpt-5.6-sol and gpt-5.6-terra are callable on QCode, billed per token, prices on /models.
Related
OpenAI legacy model retirement dates
The 09-28 batch's shutdown date has passed (instruct → terra); the 10-23 batch shut down on 2026-10-23 as well.
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GPT-4 series deprecation and removal
Noticed 2026-10-14, removed 2027-01-14: four GPT-4 models, the snapshot IDs, the official replacement gpt-6-luna, plus shutdown_date and the migration steps.
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Nine coins, 56 networks, zero platform fee for AI coding API credits.
Not affiliated with OpenAI. Checked 2026-10-26; dates and substitutes follow OpenAI's official deprecations page, and model availability follows /models.