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GPT models

OpenAI's GPT models in the API: GPT-6 Astra, GPT-6.1 Sol and Terra, GPT-6 Luna, older GPT-5.x and o-series, with every shutdown date.

  • API only
  • Models 18
  • Context up to 1.05M
  • Updated Nov 2026
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On this page

At a glance

Type
API-only models
Developer
OpenAI (United States)
First release
Jun 2018
Models tracked
18 (4 current)
Longest context
1.05M tokens
Abilities
Tool callingReasoning modeImage input
Access
Proprietary. Available through the OpenAI API, ChatGPT and Microsoft Azure. For OpenAI's downloadable models, see gpt-oss.
Website
openai.com

Newest model

GPT-6.1 Terra

Released Oct 2026 · 1.05M context

Next retirement

GPT-5, GPT-5 mini, GPT-5 nano

11 Dec 2026 · in 27 days

All GPT models

ModelReleasedAPI IDContextAbilitiesStatus
GPT-6.1 Terra Fast: visual reasoning, computer use, writingOct 2026 gpt-6.1-terra1.05MToolsReasoningVision Current
GPT-6.1 Sol Near-Astra quality at a lower priceSep 2026 gpt-6.1-sol1.05MToolsReasoningVision Current
GPT-6 Luna Cheapest, for focused high-volume tasksSep 2026 gpt-6-luna1.05MToolsReasoningVision Current
GPT-6 Astra Most capable: hardest reasoning and codingSep 2026 gpt-6-astra1.05MToolsReasoningVision Current
GPT-6 Sol Complex coding and agentic workflowsSep 2026 gpt-6-sol1.05MToolsReasoningVision Previous generation
GPT-5.6 Sol / Terra / LunaJul 2026 gpt-5.6-sol1.05MToolsReasoningVision Previous generation
GPT-5.5Apr 2026 gpt-5.51.05MToolsReasoningVision Previous generation
GPT-5.4 miniMar 2026 gpt-5.4-mini400KToolsReasoningVision Previous generation
GPT-5.4Mar 2026 gpt-5.41.05MToolsReasoningVision Previous generation
GPT-5.4 nanoMar 2026 gpt-5.4-nano—ToolsReasoningVision Deprecated Retires 1 Apr 2027
GPT-5.1Nov 2025 gpt-5.1—ToolsReasoningVision Deprecated Retires 1 Apr 2027
GPT-5, GPT-5 mini, GPT-5 nanoAug 2025 gpt-5400KToolsReasoningVision Deprecated Retires 11 Dec 2026
o3 and o3-proApr 2025 o3200KToolsReasoningVision Deprecated Retires 11 Dec 2026
GPT-4.1 and GPT-4.1 miniApr 2025 gpt-4.11MToolsVision Deprecated Retires 14 Jan 2027
GPT-4o and GPT-4o miniMay 2024 gpt-4o128KToolsVision Deprecated Retires 14 Jan 2027
GPT-5.2Dec 2025 gpt-5.2400KToolsReasoningVision Legacy
o1, o3-mini and o4-miniApr 2025 o4-mini200KToolsReasoningVision Retired
GPT-4, GPT-4 Turbo and GPT-3.5 TurboMar 2023 gpt-4-turbo—Tools Retired

Sizes, context windows and abilities come from the vendor's model documentation, checked 14 Nov 2026. Release months are the first public upload. Spotted a mistake? Tell us.

GPT lifecycle and retirement dates

GPT-5, GPT-5 mini, GPT-5 nanoDeprecated

Retires 11 Dec 2026 · in 27 days

Move to GPT-6.1 Sol, GPT-6.1 Terra, GPT-6 Luna

o3 and o3-proDeprecated

Retires 11 Dec 2026 · in 27 days

Move to GPT-6.1 Sol

GPT-4.1 and GPT-4.1 miniDeprecated

Retires 14 Jan 2027 · in 2 months

Move to GPT-6 Luna

GPT-4o and GPT-4o miniDeprecated

Retires 14 Jan 2027 · in 2 months

Move to GPT-6 Luna

GPT-5.4 nanoDeprecated

Retires 1 Apr 2027 · in 4 months

Move to GPT-6 Luna

GPT-5.1Deprecated

Retires 1 Apr 2027 · in 4 months

Move to GPT-6 Sol

ModelReleasedStatusRetirementReplacement
GPT-6.1 Terra26 Oct 2026CurrentNot announced—
GPT-6.1 Sol29 Sep 2026CurrentNot announced—
GPT-6 Luna22 Sep 2026CurrentNot announced—
GPT-6 Astra3 Sep 2026CurrentNot announced—
GPT-6 Sol22 Sep 2026Previous generationNot announced—
GPT-5.6 Sol / Terra / Luna9 Jul 2026Previous generationNot announced—
GPT-5.524 Apr 2026Previous generationNot announced—
GPT-5.4 mini17 Mar 2026Previous generationNot announced—
GPT-5.45 Mar 2026Previous generationNot announced—
GPT-5.4 nano17 Mar 2026Deprecated1 Apr 2027GPT-6 Luna
GPT-5.113 Nov 2025Deprecated1 Apr 2027GPT-6 Sol
GPT-5, GPT-5 mini, GPT-5 nano7 Aug 2025Deprecated11 Dec 2026GPT-6.1 Sol, GPT-6.1 Terra, GPT-6 Luna
o3 and o3-pro16 Apr 2025Deprecated11 Dec 2026GPT-6.1 Sol
GPT-4.1 and GPT-4.1 mini14 Apr 2025Deprecated14 Jan 2027GPT-6 Luna
GPT-4o and GPT-4o mini13 May 2024Deprecated14 Jan 2027GPT-6 Luna
GPT-5.211 Dec 2025LegacyNot announced—
o1, o3-mini and o4-mini16 Apr 2025Retired23 Oct 2026GPT-5.6 Sol / Terra
GPT-4, GPT-4 Turbo and GPT-3.5 Turbo14 Mar 2023Retired23 Oct 2026GPT-5.6 Sol / Terra

Source: official deprecation page, checked 14 Nov 2026. Dates apply to the vendor's own API; cloud partners (AWS Bedrock, Google Vertex AI, Azure) can set their own schedules.

What GPT is good for

Complex coding and agents

GPT-6 Astra and GPT-6.1 Sol, with reasoning effort from low to max.

Computer use and visual tasks

GPT-6.1 Terra is tuned for reading screens, drawings and photos.

Cheap, high-volume work

GPT-6 Luna for classification and extraction at scale.

Strengths and limits

Strengths

  • Over 1M tokens of context on the GPT-6 family.
  • Largest ecosystem: SDKs, Agents SDK, ChatGPT integration.
  • At least 6 months' notice before a generally available model is shut down.

Watch out for

  • Fast release cycle: many models are deprecated within a year.
  • Prompts above 272K input tokens cost double on GPT-6.x.

About GPT

GPT (“generative pre-trained transformer”) is OpenAI’s line of language models behind ChatGPT and the OpenAI API. After GPT-4 (2023), GPT-4o (2024) and the o-series reasoning models, GPT-5 (August 2025) merged fast answers and reasoning into one family. Updates then arrived every few months: GPT-5.1 to GPT-5.6.

The GPT-6 generation launched in September 2026 with planet-named tiers: Astra (most capable), Sol (balanced), Terra (fast, with visual reasoning and computer use) and Luna (cheapest). GPT-6.1 Sol and Terra followed in September and October. Every current model takes text and images and has a context window of about 1.05M tokens.

OpenAI retires models quickly. GPT-5, o3, GPT-4.1 and GPT-4o all have shutdown dates between December 2026 and January 2027, so check the lifecycle table before you pin a model ID in production.

GPT guides

AI & LLMs Claude Code vs Codex CLI vs Antigravity CLI: Which AI Coding Agent to Use? Updated Nov 2026 AI & LLMs How to Install OpenAI Codex CLI on Linux Updated Nov 2026 AI & LLMs How to Install vLLM on Ubuntu 24.04 (OpenAI-Compatible LLM Server) Updated Nov 2026 AI & LLMs How to Install vLLM on Ubuntu 26.04 (OpenAI-Compatible LLM Server) Updated Nov 2026 Linux How To Copy a GPT Partition Table to Another Disk using sgdisk Updated Apr 2025

Frequently asked questions

What is the latest GPT model?

The newest GPT model is GPT-6.1 Terra, released in Oct 2026. It has a 1.05M-token context window and supports tool calling, reasoning mode, image input.

Which GPT models are available in the API?

As of 14 Nov 2026, the current models are GPT-6.1 Terra (gpt-6.1-terra), GPT-6.1 Sol (gpt-6.1-sol), GPT-6 Luna (gpt-6-luna), GPT-6 Astra (gpt-6-astra).

Which GPT models are being retired?

Announced retirements: GPT-5, GPT-5 mini, GPT-5 nano on 11 Dec 2026 (replacement: GPT-6.1 Sol, GPT-6.1 Terra, GPT-6 Luna); o3 and o3-pro on 11 Dec 2026 (replacement: GPT-6.1 Sol); GPT-4.1 and GPT-4.1 mini on 14 Jan 2027 (replacement: GPT-6 Luna); GPT-4o and GPT-4o mini on 14 Jan 2027 (replacement: GPT-6 Luna); GPT-5.4 nano on 1 Apr 2027 (replacement: GPT-6 Luna).

Can I download GPT and run it locally?

No. GPT models are only available through the vendor's API and partner clouds; the weights are not published.

When does GPT-4o stop working?

OpenAI shuts down the GPT-4o and GPT-4o mini API snapshots on 14 January 2027. The recommended replacement is GPT-6 Luna.

When is GPT-5 retired?

GPT-5, GPT-5 mini, GPT-5 nano, GPT-5 pro, o3 and o3-pro leave the API on 11 December 2026.

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