ChatGPT Classic

ChatGPT Classic is a first-party custom GPT that OpenAI created inside ChatGPT on November 6, 2023, the day it announced the GPTs feature. Its public record carries no builder instructions, no uploaded files, no conversation starters and no enabled tools, so opening it gives a text-only session on whichever model ChatGPT currently serves by default. The listing has always described itself in one sentence, which as of August 2026 reads "The latest version of ChatGPT with no additional capabilities."^[1]

The GPT is still reachable at chatgpt.com/g/g-YyyyMT9XH-chatgpt-classic as of August 1, 2026, and its stored record still shows an empty configuration.^[1] What changed is the model behind it. Because the listing pins no model, it has followed ChatGPT's default through three naming eras: the description named GPT-4 from launch until June 13, 2024, then GPT-4o until early 2026, and since an edit dated April 9, 2026 it names no model at all.^[2][3][4][5] That last edit followed OpenAI retiring GPT-4o from ChatGPT entirely on April 3, 2026.^[6]

Since July 9, 2026 OpenAI has also applied the name ChatGPT Classic to something unrelated: the previous ChatGPT desktop application, which can remain installed beside the new unified desktop app that combines Chat, Work and Codex.^[7][8] The two products share a name and nothing else.

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Origin

OpenAI announced GPTs, its no-code custom versions of ChatGPT, on November 6, 2023 at its DevDay developer conference. The announcement said a GPT combined instructions, extra knowledge and a choice of skills such as web search, image generation or data analysis, and that example GPTs were available that day to ChatGPT Plus and Enterprise subscribers.^[9] The ChatGPT Classic record carries a creation timestamp of 01:08 UTC on November 6, 2023, placing it among the GPTs that existed on announcement day.^[1]

The GPT Store itself slipped from that November target and opened on January 10, 2024, initially to Plus, Team and Enterprise subscribers. OpenAI said users had already built more than three million custom versions of ChatGPT in the two months since the feature launched.^[10] Anonymous visitors to the ChatGPT Classic page in early 2024 saw the description, a sign-up button and the note "Requires ChatGPT Plus."^[2]

Configuration

The store record served with the page is unusually empty for a custom GPT, which is the point of it. Every field a builder would normally fill in is unset:

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Every other value appears in the April 2024 record and is unchanged in the live page in August 2026; only the tags field has changed, the current record exposing a single tag.^[1][2] The first_party tag and the verified "ChatGPT" builder profile mark it as OpenAI's own listing rather than a third-party imitation; ordinary builders cannot publish under that profile. The record exposes no conversation count, so there is no published figure for how much the GPT is used.^[1]

Model history

The one line of prose on the listing is the only place OpenAI named the model, and it has been rewritten twice. Archived captures date both changes:

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The first rewrite carries an edit timestamp of 23:11 UTC on June 13, 2024, recorded in the first capture showing the new wording, a month after OpenAI released GPT-4o on May 13, 2024 and began moving ChatGPT's default onto it.^[1][12] The second carries an edit timestamp of April 9, 2026.^[1] That date sits just after the end of the GPT-4o retirement sequence. OpenAI announced on January 29, 2026 that GPT-4o, GPT-4.1, GPT-4.1 mini and o4-mini would leave ChatGPT on February 13, 2026, noting that only about 0.1% of users were still choosing GPT-4o each day.^[13] Business, Enterprise and Edu customers kept GPT-4o inside custom GPTs until April 3, 2026, after which OpenAI described it as fully retired across all plans. GPTs configured with a retired model were moved automatically to the closest GPT-5.3 Instant or GPT-5.4 Thinking or Pro equivalent.^[6]

Since ChatGPT Classic never pinned a model, it needed no such migration, and OpenAI's April 2026 edit simply removed the model name. OpenAI's help documentation states the general rule: when a model is retired, GPTs are automatically switched to a similar current model.^[14] The company has not published which model ChatGPT Classic serves today, and the listing no longer says.

What "no additional capabilities" means

Default ChatGPT is not only a model. It is a model plus a tool layer that the assistant can invoke on its own: web search, image generation through DALL-E, sandboxed Python via the code interpreter, file reading and, for many accounts, a persistent memory. A custom GPT selects which of those capabilities to switch on.^[14] ChatGPT Classic switches on none of them, which is why an otherwise blank GPT was worth publishing at all: with an empty configuration, the listing is a way to reach the large language model with the surrounding machinery stripped away.

OpenAI's documentation adds a second difference that applies to every GPT rather than to this one specifically. GPTs do not use saved memory, custom instructions or previous conversations, so each GPT conversation starts without those sources of context.^[14] Combined with an empty tool list, that makes a ChatGPT Classic session a comparatively plain baseline: no tool calls, no personalization carried in, no builder prompt in front of the user's own.

The listing is therefore useful mainly as a primary artifact. It records that OpenAI itself treated the model and the tools around it as separable products in 2023, and its three descriptions form a small dated trail of what the company was willing to call its default chat model. OpenAI's public documentation covers GPTs as a category and does not discuss ChatGPT Classic on its own, and the GPT has attracted little independent coverage, so claims about how it is used in practice should be treated cautiously.

Access

At store launch the page told logged-out visitors that a ChatGPT Plus subscription was required.^[2] That restriction has since gone. OpenAI's help documentation as of July 2026 states that GPTs are available to all ChatGPT users, that a public GPT page may be visible without signing in but that users are prompted to sign in before chatting, and that creating or editing a GPT still requires a paid subscription.^[14] Fetching the ChatGPT Classic URL while logged out in August 2026 returns the listing's title and description but a login prompt in place of the chat interface.^[1]

The desktop application of the same name

See ChatGPT desktop app for the application itself.

On July 9, 2026 OpenAI released a new desktop app for macOS and Windows that puts Chat, Work and Codex in a single application. Users of the previous ChatGPT desktop app were prompted to download the new one, and the release notes said the old app may remain installed under the name ChatGPT Classic.^[8]

OpenAI's migration guide is explicit that keeping it is a supported choice: ChatGPT Classic "continues to receive model updates, bug fixes, security patches, and support for its existing Enterprise capabilities," while new agent features such as Work and Codex appear only in the new app.^[7] The rename caused visible confusion. Threads on OpenAI's developer forum in July 2026 reported users who could not find the chat experience after updating, who were unsure of the difference between ChatGPT, ChatGPT Classic and Codex, and who had not been left with a copy of the old app at all.^[15]

Nothing connects this application to the custom GPT beyond the word "Classic," which OpenAI has now used twice for the same purpose: labelling the older, plainer version of a product it has since expanded.

See also

• Custom GPT
• GPT Store
• ChatGPT
• GPT-4
• GPT-4o
• System prompt

References

1. ^ChatGPT Classic listing, `chatgpt.com/g/g-YyyyMT9XH-chatgpt-classic`, retrieved August 1, 2026. Page metadata and the embedded store record supply the description text, the creation timestamp of 2023-11-06T01:08:05Z, the last-edited timestamp of 2026-04-09T16:12:55Z, and the empty `model`, `instructions`, `tools`, `files` and `prompt_starters` fields. chatgpt.com/...g-YyyyMT9XH-chatgpt-classic
2. ^Internet Archive capture of the listing, April 1, 2024, showing the GPT-4 description, the verified "ChatGPT" builder profile, the `public` and `first_party` tags and the notice "Requires ChatGPT Plus". web.archive.org/...g-YyyyMT9XH-chatgpt-classic
3. ^Internet Archive capture of the listing, June 13, 2024 (last capture with the GPT-4 wording). web.archive.org/...g-YyyyMT9XH-chatgpt-classic
4. ^Internet Archive capture of the listing, June 15, 2024 (first capture with the GPT-4o wording). web.archive.org/...g-YyyyMT9XH-chatgpt-classic
5. ^Internet Archive capture of the listing, April 24, 2026 (first capture with the model-free wording). web.archive.org/...g-YyyyMT9XH-chatgpt-classic
6. ^OpenAI, "Retiring GPT-4o and other ChatGPT models", OpenAI Help Center, archived July 25, 2026. web.archive.org/...gpt-4o-and-other-chatgpt-models
7. ^OpenAI, "Moving to the new ChatGPT desktop app", OpenAI Help Center, archived July 25, 2026. web.archive.org/...-to-the-new-chatgpt-desktop-app
8. ^OpenAI, "ChatGPT - Release Notes", entry dated July 9, 2026, archived July 31, 2026. web.archive.org/...6825453-chatgpt-release-notes
9. ^OpenAI, "Introducing GPTs", November 6, 2023, archived May 2, 2024. web.archive.org/...introducing-gpts
10. ^OpenAI, "Introducing the GPT Store", January 10, 2024, archived May 2, 2024. web.archive.org/...introducing-the-gpt-store
11. ^Internet Archive capture of the listing, February 22, 2026 (last capture with the GPT-4o wording). web.archive.org/...g-YyyyMT9XH-chatgpt-classic
12. ^OpenAI, "Hello GPT-4o", May 13, 2024, archived the same day. web.archive.org/...hello-gpt-4o
13. ^OpenAI, "Retiring GPT-4o, GPT-4.1, GPT-4.1 mini, and OpenAI o4-mini in ChatGPT", January 29, 2026, archived July 25, 2026. web.archive.org/...retiring-gpt-4o-and-older-models
14. ^OpenAI, "GPTs in ChatGPT", OpenAI Help Center, archived July 25, 2026. web.archive.org/...8554407-gpts-in-chatgpt
15. ^OpenAI Developer Community, "Windows desktop app migration is confusing (ChatGPT vs ChatGPT Classic)", July 11, 2026. community.openai.com/...1386432