On Tuesday, OpenAI launched a brand new basis mannequin known as GPT-5.5 Prompt, which can change GPT-5.3 Prompt because the default ChatGPT mannequin. The corporate stated the mannequin reduces hallucination in delicate areas similar to regulation, drugs, and finance, whereas sustaining the low latency of its predecessor.
OpenAI launched the latest GPT-5.5 model last month with the corporate claiming enhancements in areas like coding and data work.
The brand new mannequin additionally achieved a rating of 81.2 within the AIME 2025 math check, in comparison with 65.4 for the older mannequin. It additionally outperformed its predecessor on the MMMU-Professional multimodal reasoning benchmark, with a rating of 76 vs. 69.2.
The discharge positioned a specific emphasis on context administration. GPT-5.5 Prompt can use its search device to refer again to previous conversations, information, and Gmail to present you extra personalised solutions. This characteristic shall be out there to Plus and Professional customers on the internet, with plans to roll it out to cell quickly. OpenAI stated that it plans to increase entry to this characteristic to Free, Go Enterprise, and enterprise customers within the coming weeks.
With this replace, ChatGPT may even present reminiscence sources throughout all fashions that will help you perceive the place it generated the solutions from. Customers can delete outdated sources or appropriate them if the reply was flawed. Crucially, the corporate stated that when you share a chat with somebody, they received’t be capable to see the reminiscence sources.
For builders, the GPT-5.5 mannequin shall be out there by way of API as “chat-latest,” with 5.3 out there as an possibility for paid customers for under three months.
The corporate has faced rebuttal from earlier mannequin withdrawal strikes. When OpenAI withdrew its GPT-4o mannequin, there was important backlash from customers who related to the model’s “personality.” GPT-4o affirmed customers’ decisions steadily and that made them really feel a connection to that specific mannequin. Customers who signed petitions to cease OpenAI from retiring it described the mannequin as their “finest pal” or “a mirror.” Regardless of the outcry, GPT-4o was deprecated in February 2026.
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