OpenAI retiring o3 and GPT-4.5 from ChatGPT
OpenAI announced the retirement of two models from ChatGPT: GPT-4.5 on June 27, 2026 (30-day sunset) and o3 on August 26, 2026 (90-day sunset). Both models are currently available only to paid users via model settings. The retirements apply to ChatGPT only; API access is unaffected.
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OpenAI Retiring GPT-4o, GPT-4.1, GPT-4.1 mini, and o4-mini from ChatGPT in February 2026
OpenAI announced that on February 13, 2026, it will retire GPT-4o, GPT-4.1, GPT-4.1 mini, and o4-mini from ChatGPT, alongside the previously announced retirement of GPT-5 variants (Instant, Thinking, and Pro). The retirements apply only to the ChatGPT product interface; API access to these models is unaffected at this time. This signals a consolidation of the ChatGPT model lineup, likely in favor of newer or more capable successors.
OpenAI retiring GPT-4o, GPT-4.1, and o4-mini from ChatGPT on February 13, 2026
OpenAI announced that GPT-4o, GPT-4.1, GPT-4.1 mini, and OpenAI o4-mini will be retired from ChatGPT on February 13, 2026, alongside the previously announced retirement of GPT-5 Instant and Thinking. The API is unaffected by these changes at this time. The move signals continued consolidation of OpenAI's model lineup in the ChatGPT product as newer flagship models supersede older ones.
OpenAI retires GPT-4o, GPT-4.1, o4-mini, and GPT-5 variants from ChatGPT
OpenAI has retired GPT-4o, GPT-4.1, GPT-4.1 mini, OpenAI o4-mini, and both GPT-5 Instant and GPT-5 Thinking from ChatGPT as of February 13, 2026. The retirements were previously announced and affect only the ChatGPT product; no API changes are included at this time. This marks a significant generational turnover in OpenAI's publicly accessible model lineup.
OpenAI retires GPT-5.2 models from ChatGPT, migrating users to GPT-5.5
As of June 12, 2026, OpenAI has removed GPT-5.2 Instant, GPT-5.2 Thinking, and GPT-5.2 Pro from ChatGPT, with existing conversations automatically continuing on corresponding GPT-5.5 models. The retirement follows OpenAI's stated policy of keeping models available for approximately 90 days after a successor is released. This reflects OpenAI's ongoing model lifecycle management as the GPT-5.x generation matures.
OpenAI retires GPT-5.1 models from ChatGPT, migrates users to GPT-5.3/5.4
OpenAI removed GPT-5.1 Instant, GPT-5.1 Thinking, and GPT-5.1 Pro from ChatGPT as of March 11, 2026. Existing conversations using GPT-5.1 variants are automatically migrated to corresponding current models: GPT-5.3 Instant, GPT-5.4 Thinking, and GPT-5.4 Pro. This is a routine model lifecycle action reflecting OpenAI's cadence of deprecating older model versions as newer ones become the standard.
OpenAI retires GPT-5 Instant and Thinking variants from ChatGPT
OpenAI retired the GPT-5 Instant and Thinking model variants from ChatGPT on February 13, 2026. The retirement affects only the ChatGPT product; no API changes are included. This signals a product lifecycle transition as newer flagship models supersede these variants.
OpenAI deprecates older GPT-5 and Codex model variants in ChatGPT
OpenAI is removing six model variants from the ChatGPT model picker starting April 7, 2026, including gpt-5.2-codex, gpt-5.1-codex-mini, gpt-5.1-codex-max, gpt-5.1-codex, gpt-5.1, and gpt-5, with full removal from Codex on April 14. Users are directed toward gpt-5.4, gpt-5.4-mini, gpt-5.3-codex, and gpt-5.2 as the supported options, with gpt-5.3-codex-spark available to Pro subscribers. The update signals OpenAI consolidating its model lineup around newer GPT-5.x variants and retiring earlier iterations.
GPT-4 API General Availability and Completions API Deprecation Plan
OpenAI has announced general availability of the GPT-4 API, alongside GPT-3.5 Turbo, DALL·E, and Whisper APIs. Concurrently, OpenAI is releasing a deprecation plan for older models in the Completions API, which are set to retire at the beginning of 2024. This marks a significant milestone in OpenAI's API product lifecycle, transitioning GPT-4 from limited access to broad developer availability.