Model ID reference

OpenAI model IDs: the GPT model names list

Q: What are the current OpenAI model names?

OpenAI’s featured models are gpt-6-astra, gpt-6.1-sol, gpt-6-luna: GPT-6 Astra for complex reasoning and coding, GPT-6.1 Sol to balance intelligence and cost, and GPT-6 Luna for high-volume, cost-sensitive work. Many older models, such as the GPT-5.6 and GPT-5.5 families, are still available; the list above shows each with its status.

Q: What is the difference between gpt-5.5 and gpt-5.5-2026-04-23?

gpt-5.5 is the model name, which points to a default snapshot. gpt-5.5-2026-04-23 is that snapshot: a fixed version that OpenAI says lets you keep performance and behaviour consistent. Use the dated snapshot in production so your results don’t shift if the name is pointed at a newer snapshot.

Q: When do GPT-4 and GPT-3.5 Turbo stop working?

OpenAI shuts down gpt-4, gpt-4-turbo and gpt-3.5-turbo (with their snapshots) on 23 Oct 2026. Its recommended replacements are gpt-5.6-sol for GPT-4 and GPT-4 Turbo, and gpt-5.6-terra for GPT-3.5 Turbo. Test the replacement on your own prompts before then.

Q: Is gpt-4o still available?

Yes. gpt-4o points to the gpt-4o-2024-08-06 snapshot, and gpt-4o-2024-11-20 is also available. The oldest snapshot, gpt-4o-2024-05-13, is deprecated and shuts down on 23 October 2026, with gpt-5.6-sol as the recommended replacement.

Q: What does chat-latest point to?

chat-latest points to the latest Instant model used in ChatGPT, and OpenAI updates the snapshot behind it regularly. That makes it useful for trying ChatGPT’s current behaviour, but OpenAI says it isn’t recommended for API use and suggests GPT-6 Astra for production.

Q: How do I list the models my OpenAI API key can use?

Call GET https://api.openai.com/v1/models with your key. It returns every model available to you with its id, creation time and owner, and the id is the exact string to pass as model. It doesn’t say which IDs are aliases or when they shut down, which is what this page adds.

Copy the exact model ID for every current OpenAI text model, from gpt-6-astra to dated snapshots like gpt-5.5-2026-04-23, with context windows and OpenAI’s shutdown dates. Free, and it runs in your browser.

Search by model name or ID

42 models. Click an ID to copy it.

GPT-6 Astra
CurrentRecommended
1.05M context · 128K max output
API ID
- Pinned
Source
GPT-6.1 Sol
CurrentRecommended
1.05M context · 128K max output
API ID
- Pinned
Pricing and specs Source
GPT-6 Luna
CurrentRecommended
1.05M context · 128K max output
API ID
- Pinned
Pricing and specs Source
GPT-5.6 Sol
Current
1.05M context · 128K max output
API ID
- Pinned
- Alias
  Routes requests to GPT-5.6 Sol.
Source
GPT-5.6 Terra
Current
1.05M context · 128K max output
API ID
- Pinned
Source
GPT-5.6 Luna
Current
1.05M context · 128K max output
API ID
- Pinned
Source
GPT-5.6 Cyber
CurrentRestricted access
400K context · 128K max output
API ID
- Alias
  An alias for OpenAI’s most advanced cybersecurity models.
Needs separate approval: OpenAI asks defenders to apply through its Daybreak programme.
Source
GPT-5.5
Current
1.05M context · 128K max output
API ID
- Alias
- Pinned
Source
GPT-5.5 Pro
Current
1.05M context · 128K max output
API ID
- Alias
- Pinned
Source
GPT-5.4
Current
1.05M context · 128K max output
API ID
- Alias
- Pinned
Source
GPT-5.4 Pro
Current
1.05M context · 128K max output
API ID
- Alias
- Pinned
Source
GPT-5.4 mini
Current
400K context · 128K max output
API ID
- Alias
- Pinned
Source
GPT-4o
Current
128K context · 16,384 max output
API ID
- Alias
  Points to gpt-4o-2024-08-06.
- Pinned
- Pinned
- Pinned
  Deprecated: shuts down on 23 October 2026 (replacement gpt-5.6-sol).
Source
GPT-4o mini
Current
128K context · 16,384 max output
API ID
- Alias
- Pinned
Source
Chat Latest
Current
400K context · 128K max output
API ID
- Alias
  Points to the latest Instant model used in ChatGPT; the snapshot behind it is updated regularly.
OpenAI lists it under ChatGPT models, not recommended for API use, and recommends GPT-6 Astra for production.
Source
GPT-6 Sol
Legacy
1.05M context · 128K max output
API ID
- Pinned
Replacement: gpt-6.1-sol
OpenAI points to GPT-6.1 Sol as the newer Sol model.
Source
GPT-5.2
Legacy
400K context · 128K max output
API ID
- Alias
- Pinned
Replacement: gpt-6-astra
OpenAI calls it its previous flagship and recommends GPT-6 Astra.
Source
GPT-5.2 Pro
Legacy
400K context · 128K max output
API ID
- Alias
- Pinned
Replacement: gpt-5.5-pro
OpenAI recommends GPT-5.5 Pro as the latest pro model.
Source
GPT-4.1
Legacy
1,047,576 context · 32,768 max output
API ID
- Alias
- Pinned
A non-reasoning model. OpenAI’s page recommends starting with a GPT-5 model for more complex tasks.
Source
GPT-4.1 mini
Legacy
1,047,576 context · 32,768 max output
API ID
- Alias
- Pinned
A non-reasoning model. OpenAI’s page recommends starting with a GPT-5 model for more complex tasks.
Source
GPT-5.1
Deprecated
400K context · 128K max output
API ID
- Alias
- Pinned
Retires 1 Apr 2027. Replacement: gpt-6-sol
Source
GPT-5.3-Codex
Deprecated
400K context · 128K max output
API ID
- Pinned
Retires 1 Apr 2027. Replacement: gpt-6-sol
Source
GPT-5.4 nano
Deprecated
400K context · 128K max output
API ID
- Alias
- Pinned
Retires 1 Apr 2027. Replacement: gpt-6-luna
Source
GPT-5
Deprecated
400K context · 128K max output
API ID
- Alias
- Pinned
Retires 11 Dec 2026. Replacement: gpt-5.6-sol
OpenAI’s deprecations page schedules gpt-5-2025-08-07, the only snapshot behind the gpt-5 alias, for shutdown.
Source
GPT-5 mini
Deprecated
400K context · 128K max output
API ID
- Alias
- Pinned
Retires 11 Dec 2026. Replacement: gpt-5.6-terra
OpenAI’s deprecations page schedules gpt-5-mini-2025-08-07, the only snapshot behind the alias, for shutdown.
Source
GPT-5 nano
Deprecated
400K context · 128K max output
API ID
- Alias
- Pinned
Retires 11 Dec 2026. Replacement: gpt-5.6-luna
OpenAI’s deprecations page schedules gpt-5-nano-2025-08-07, the only snapshot behind the alias, for shutdown.
Source
GPT-5 Pro
Deprecated
400K context · 272K max output
API ID
- Alias
- Pinned
Retires 11 Dec 2026. Replacement: gpt-5.6-sol
OpenAI’s suggested replacement is gpt-5.6-sol with reasoning.mode set to pro.
Source
o3
Deprecated
200K context · 100K max output
API ID
- Alias
- Pinned
Retires 11 Dec 2026. Replacement: gpt-5.6-sol
Source
o3-pro
Deprecated
200K context · 100K max output
API ID
- Alias
- Pinned
Retires 11 Dec 2026. Replacement: gpt-5.6-sol
OpenAI’s suggested replacement is gpt-5.6-sol with reasoning.mode set to pro.
Source
GPT-4.1 nano
Deprecated
1,047,576 context · 32,768 max output
API ID
- Alias
- Pinned
Retires 23 Oct 2026. Replacement: gpt-5.6-luna
Source
o4-mini
Deprecated
200K context · 100K max output
API ID
- Alias
- Pinned
Retires 23 Oct 2026. Replacement: gpt-5.6-terra
Source
o3-mini
Deprecated
200K context · 100K max output
API ID
- Alias
- Pinned
Retires 23 Oct 2026. Replacement: gpt-5.6-sol
Source
o1
Deprecated
200K context · 100K max output
API ID
- Alias
- Pinned
Retires 23 Oct 2026. Replacement: gpt-5.6-sol
Source
o1-pro
Deprecated
200K context · 100K max output
API ID
- Alias
- Pinned
Retires 23 Oct 2026. Replacement: gpt-5.6-sol
OpenAI’s suggested replacement is gpt-5.6-sol with reasoning.mode set to pro.
Source
GPT-4 Turbo
Deprecated
128K context · 4,096 max output
API ID
- Alias
- Pinned
Retires 23 Oct 2026. Replacement: gpt-5.6-sol
Source
GPT-4
Deprecated
8,192 context · 8,192 max output
API ID
- Alias
- Pinned
Retires 23 Oct 2026. Replacement: gpt-5.6-sol
Source
GPT-3.5 Turbo
Deprecated
16,385 context · 4,096 max output
API ID
- Alias
- Pinned
Retires 23 Oct 2026. Replacement: gpt-5.6-terra
gpt-3.5-turbo-1106 and gpt-3.5-turbo-instruct were shut down on 28 September 2026.
Source
GPT-5.2 Chat and GPT-5.3 Chat
Retired
API ID
- Alias
- Alias
Retired 10 Aug 2026. Replacement: gpt-5.6-sol
Source
GPT-5.2-Codex
Retired
API ID
- Pinned
Retired 23 Jul 2026. Replacement: gpt-5.6-sol
Source
GPT-5.1-Codex family and GPT-5-Codex
Retired
API ID
- Pinned
- Pinned
- Pinned
  OpenAI’s suggested replacement is gpt-5.6-terra.
- Pinned
Retired 23 Jul 2026. Replacement: gpt-5.6-sol
Source
GPT-5 Chat and GPT-5.1 Chat
Retired
API ID
- Alias
- Alias
Retired 23 Jul 2026. Replacement: gpt-5.6-sol
Source
o3 and o4-mini deep research
Retired
API ID
- Alias
- Pinned
- Alias
- Pinned
Retired 23 Jul 2026. Replacement: gpt-5.6-sol
Source

Steps

How to find and copy a GPT model ID

Search by model name (“gpt-5”, “o3”, “mini”) or paste an ID from your code to see its status.
Click an ID to copy it. Copy the dated snapshot (Pinned) when results must stay the same.
Filter by Deprecated to see every model with a shutdown date, and the replacement OpenAI recommends.
Open “Show code” for the Responses API call with that model ID in place.

Method

How it works

OpenAI documents every API model on its own page, with a model ID, a default snapshot and a list of snapshots. This page lists the text models (chat, reasoning and coding models) with those IDs, and leaves out image, audio, embedding and moderation models.

Model IDs, aliases and snapshots

A model name such as gpt-5.5 points to a default snapshot, here gpt-5.5-2026-04-23. OpenAI describes snapshots as the way to “lock in a specific version of the model so that performance and behavior remain consistent”, so pin the snapshot in production and use the plain name for trying things out. Older families keep several snapshots: gpt-4o lists gpt-4o-2024-11-20, gpt-4o-2024-08-06, gpt-4o-2024-05-13. Several newer models, such as GPT-6 Astra and the GPT-5.6 family, list a single snapshot with the same name as the model, so the model ID is also the pinned ID. A few names are aliases by design: chat-latest follows the model used in ChatGPT and is updated regularly, and gpt-5.6 routes to GPT-5.6 Sol.

Which model to start with

OpenAI’s own advice is to start with GPT-6 Astra (gpt-6-astra) for complex reasoning and coding, choose GPT-6.1 Sol (gpt-6.1-sol) to balance intelligence and cost, and GPT-6 Luna (gpt-6-luna) for cost-sensitive, high-volume work. It describes chat-latest as not recommended for API use. The Pro models (for example gpt-5.5-pro) use more compute per answer; for deprecated Pro models (gpt-5-pro, o3-pro, o1-pro) OpenAI’s suggested replacement is gpt-5.6-sol with reasoning.mode set to pro.

Legacy, deprecated and shut down

OpenAI uses “legacy” for models that no longer receive updates and “deprecated” once a shutdown date is set; after that date the model can’t be called. Its minimum notice periods are at least six months for generally available models, at least three months for specialised variants such as chat, Codex and deep research models, and as little as two weeks for preview models, so OpenAI advises against previews for business-critical work. The next big shutdown is on 23 Oct 2026, when gpt-4, gpt-4-turbo, gpt-3.5-turbo, gpt-4.1-nano, o1, o3-mini, o4-mini and the gpt-4o-2024-05-13 snapshot stop working. The table of upcoming shutdowns below is built from the same data as the list.

How to migrate

Search your code and configuration for the old ID, switch to the replacement in a test environment, and compare outputs on real prompts before the date. A replacement is priced differently and may use reasoning tokens, so check the cost with the LLM cost calculator and compare candidates in the model comparison. To see which IDs your key can call, use GET https://api.openai.com/v1/models or paste the key into the API key checker, which makes that request from your browser. No key yet? See how to get an OpenAI API key.

Examples

Worked examples

Which GPT ID to use in production

OpenAI (GPT)
A model name such as gpt-5.5 is an alias for its default snapshot. Dated snapshots (gpt-5.5-2026-04-23) lock in one version so behaviour stays the same: pin the snapshot in production. Several newer models list a single snapshot with the same name as the model.
List your models: GET https://api.openai.com/v1/models

Recommended GPT models

The models OpenAI currently recommends, with the ID to copy. Checked 11 Oct 2026.
Model	API ID	Context
GPT-6 Astra		1.05M
GPT-6.1 Sol		1.05M
GPT-6 Luna		1.05M

Upcoming GPT shutdowns

Deprecated GPT models by shutdown date, from OpenAI’s deprecations page. Checked 11 Oct 2026.
Shuts down	Model IDs	Replacement
23 Oct 2026	gpt-4.1-nano, gpt-4.1-nano-2025-04-14	gpt-5.6-luna
23 Oct 2026	o4-mini, o4-mini-2025-04-16	gpt-5.6-terra
23 Oct 2026	o3-mini, o3-mini-2025-01-31	gpt-5.6-sol
23 Oct 2026	o1, o1-2024-12-17	gpt-5.6-sol
23 Oct 2026	o1-pro, o1-pro-2025-03-19	gpt-5.6-sol
23 Oct 2026	gpt-4-turbo, gpt-4-turbo-2024-04-09	gpt-5.6-sol
23 Oct 2026	gpt-4, gpt-4-0613	gpt-5.6-sol
23 Oct 2026	gpt-3.5-turbo, gpt-3.5-turbo-0125	gpt-5.6-terra
11 Dec 2026	gpt-5, gpt-5-2025-08-07	gpt-5.6-sol
11 Dec 2026	gpt-5-mini, gpt-5-mini-2025-08-07	gpt-5.6-terra
11 Dec 2026	gpt-5-nano, gpt-5-nano-2025-08-07	gpt-5.6-luna
11 Dec 2026	gpt-5-pro, gpt-5-pro-2025-10-06	gpt-5.6-sol
11 Dec 2026	o3, o3-2025-04-16	gpt-5.6-sol
11 Dec 2026	o3-pro, o3-pro-2025-06-10	gpt-5.6-sol
1 Apr 2027	gpt-5.1, gpt-5.1-2025-11-13	gpt-6-sol
1 Apr 2027	gpt-5.3-codex	gpt-6-sol
1 Apr 2027	gpt-5.4-nano, gpt-5.4-nano-2026-03-17	gpt-6-luna

FAQ

Frequently asked questions

What are the current OpenAI model names?

OpenAI’s featured models are gpt-6-astra, gpt-6.1-sol, gpt-6-luna: GPT-6 Astra for complex reasoning and coding, GPT-6.1 Sol to balance intelligence and cost, and GPT-6 Luna for high-volume, cost-sensitive work. Many older models, such as the GPT-5.6 and GPT-5.5 families, are still available; the list above shows each with its status.

What is the difference between gpt-5.5 and gpt-5.5-2026-04-23?

gpt-5.5 is the model name, which points to a default snapshot. gpt-5.5-2026-04-23 is that snapshot: a fixed version that OpenAI says lets you keep performance and behaviour consistent. Use the dated snapshot in production so your results don’t shift if the name is pointed at a newer snapshot.

When do GPT-4 and GPT-3.5 Turbo stop working?

OpenAI shuts down gpt-4, gpt-4-turbo and gpt-3.5-turbo (with their snapshots) on 23 Oct 2026. Its recommended replacements are gpt-5.6-sol for GPT-4 and GPT-4 Turbo, and gpt-5.6-terra for GPT-3.5 Turbo. Test the replacement on your own prompts before then.

Is gpt-4o still available?

Yes. gpt-4o points to the gpt-4o-2024-08-06 snapshot, and gpt-4o-2024-11-20 is also available. The oldest snapshot, gpt-4o-2024-05-13, is deprecated and shuts down on 23 October 2026, with gpt-5.6-sol as the recommended replacement.

What does chat-latest point to?

chat-latest points to the latest Instant model used in ChatGPT, and OpenAI updates the snapshot behind it regularly. That makes it useful for trying ChatGPT’s current behaviour, but OpenAI says it isn’t recommended for API use and suggests GPT-6 Astra for production.

How do I list the models my OpenAI API key can use?

Call GET https://api.openai.com/v1/models with your key. It returns every model available to you with its id, creation time and owner, and the id is the exact string to pass as model. It doesn’t say which IDs are aliases or when they shut down, which is what this page adds.

Read

Model IDs