OpenAI has announced an update that enhances the GPT-5.5 Instant model and retires several older models from ChatGPT, including o3 and GPT-4.5. The company shared this information in an updated release notes document.
The update focuses on improving GPT-5.5’s response quality and style, while also phasing out older models to optimize computing resources. GPT-5.5 Instant was first released on April 23 and has continued to receive updates through May 2026.
GPT-5.5 Instant Improvements, And Legacy Model Retirements
OpenAI indicates that the updated GPT-5.5 will deliver more accurate responses and feature an improved writing style. Key changes include shorter, less bullet-heavy answers designed to sound more human, along with responses that are more natural and easier to read in everyday conversations.
The update also enhances pacing for practical help tasks. These adjustments aim to make ChatGPT feel more conversational and less formulaic.
OpenAI is sunsetting two older models from ChatGPT to prioritize newer, more capable ones:
- GPT-4.5 will be retired on June 27, following a 30-day sunset period
- o3 will be retired on August 26, following a 90-day sunset period
Both models are currently available only to paid ChatGPT users. OpenAI notes that while o3 has limited ongoing demand, GPT-4.5 has a more dedicated following. GPT-4.5 was closer in behavior to GPT-4o, which made it feel more personal to some users and contributed to its appeal.
Users who rely on these models should plan to transition to GPT-5.5 or another available model before the respective retirement dates.
New Job Search Integration in ChatGPT and When These Changes Roll Out
OpenAI is introducing a new job search feature in ChatGPT. This update enables ChatGPT to display live job listings and freelance opportunities.
According to OpenAI’s release notes, it can fetch listings from sources such as Indeed, Upwork, Appcast, and various websites across the internet. Results are tailored to the user’s experience, skills, and goals, helping to highlight relevant roles. Users can follow links to apply directly on the original sites.
In addition to the job search feature, OpenAI has enhanced ChatGPT’s capabilities to create resumes, make edits to existing ones, and export them in professional formats.
The rollout of GPT-5.5 improvements and the job search integration is gradually happening worldwide. OpenAI has not announced a specific date for the full global rollout.
The model retirements follow established schedules, with GPT-4.5 being phased out of ChatGPT on June 27 and O3 on August 26.
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