Killed by OpenAI
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modelGPT-3.5 Legacy Snapshots
The final decommission of the GPT-3.5 architecture, including 1106 and turbo-instruct. Recommended replacement: gpt-5.4-mini. It will be almost 3 years old.
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Base GPT Models (Babbage-002, Davinci-002)
The remaining second-generation base models used for fine-tuning and simple completions. Recommended replacement: gpt-5.4-mini or gpt-5-mini. It will be about 3 years old.
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Assistants API
A high-level API for building AI assistants. Deprecated in favor of the more flexible Responses and Conversations APIs. Recommended replacement: Responses API and Conversations API. It will be almost 3 years old.
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DALL·E 3
The third iteration of OpenAI's image generator. Retired to make way for the 'GPT Image' natively multimodal series. Recommended replacement: gpt-image-1 or gpt-image-1-mini. It will be over 2 years old.
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DALL·E 2 (API)
The model that sparked the AI image generation trend. Retired alongside DALL-E 3. Recommended replacement: gpt-image-1-mini. It will be about 4 years old.
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gpt-4o-realtime-preview
The preview version of the low-latency audio API. Recommended replacement: gpt-realtime-1.5. It will be over 1 year old.
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GPT-4 Early Snapshots (0314, 1106, 0125)
Killed about 22 hours ago, Legacy GPT-4 and GPT-4 Turbo preview snapshots (including 0314, 1106-preview, and 0125-preview). Retired to streamline the API toward the GPT-5 series. Recommended replacement: gpt-5 or gpt-4.1. It was about 3 years old.
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Sora (App & API)
Killed 3 days ago, A high-fidelity text-to-video platform. Abruptly shuttered following the collapse of a $1B Disney partnership and a strategic pivot to robotics/IPO prep. Recommended replacement: Google Veo or Kling. It was over 1 year old.
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Nerdy Personality Preset
Killed 11 days ago, A system-level personality setting in ChatGPT that favored technical, jargon-heavy responses. Replaced by standard personalization settings. It was 4 months old.
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GPT-5.1 (Instant, Thinking, Pro)
Killed 16 days ago, Short-lived iterative models from the GPT-5 series, retired across ChatGPT and GPTs to consolidate on the 5.2 architecture. Recommended replacement: GPT-5.2 series. It was 7 months old.
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chatgpt-4o-latest (API)
Killed about 1 month ago, The specific dynamic pointer for the latest ChatGPT-flavor of GPT-4o in the API. Recommended replacement: gpt-5.1-chat-latest. It was almost 2 years old.
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GPT-5 (Instant & Thinking Preview)
Killed about 1 month ago, The initial launch versions of the GPT-5 series, sunset after the 5.1 and 5.2 updates rendered them obsolete. Recommended replacement: GPT-5.2. It was 6 months old.
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GPT-4o (ChatGPT version)
Killed about 1 month ago, The 'Omni' model that powered ChatGPT. Deprecated to consolidate users onto the GPT-5 foundational series. Recommended replacement: GPT-5 series. It was almost 2 years old.
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o4-mini
Killed about 1 month ago, An efficiency-focused reasoning model. Retired from ChatGPT just four months after release. Recommended replacement: gpt-5.4-mini. It was 5 months old.
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ChatGPT macOS Voice Experience
Killed 2 months ago, The specialized hands-free voice interface for Mac. Retired in favor of the cross-platform unified 'Advanced Voice' system. It was over 1 year old.
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o1-preview / o1-mini
Killed 5 months ago, The first reasoning models from OpenAI. Sunset following the release of o3 and o4 series. Recommended replacement: o3 or o4-mini. It was about 1 year old.
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GPT-4.5-preview
Killed 9 months ago, A very short-lived preview that bridged the gap between GPT-4 and GPT-5. Recommended replacement: gpt-4.1. It was 5 months old.
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ChatGPT Plugins (Legacy Conversations)
Killed almost 2 years ago, The precursor to Custom GPTs. Legacy conversations using these plugins were officially scrubbed and converted to standard text recently. It was about 1 year old.
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DALL·E 2 (Labs Web App)
Killed about 2 years ago, The original web interface for DALL·E 2. OpenAI stopped accepting new customers and credit purchases on this date, directing all web users to DALL·E 3 within ChatGPT. Recommended replacement: ChatGPT (DALL·E 3). It was almost 2 years old.
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Codex API
Killed about 3 years ago, The specialized model series (including code-davinci-002) for natural language to code. Shut down with only 3 days' notice. Recommended replacement: gpt-4o. It was over 1 year old.
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OpenAI Gym
Killed over 4 years ago, The industry-standard toolkit for reinforcement learning. OpenAI ceased maintenance in 2021. Recommended replacement: Gymnasium. It was over 5 years old.