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OpenAI has started making its newest AI model, GPT-4.5, available to users on the ChatGPT Plus subscription plan. The rollout is expected to take a few days, and OpenAI has mentioned that the usage limits might change during this time.
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GPT-4.5 First Released to ChatGPT Pro Users
Last week, GPT-4.5 was first introduced to subscribers of OpenAI’s $200-per-month ChatGPT Pro plan. OpenAI has expressed its goal to give users with access to GPT-4.5 a higher usage limit but expects the limits to adjust as they see how much demand there is for the model.
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GPT-4.5: OpenAI’s Largest AI Model
GPT-4.5 is OpenAI’s biggest AI model yet, trained with more computing power and data than any previous AI version. However, despite its size, it isn't necessarily the best when compared to newer AI models from other companies like DeepSeek and Anthropic, as it falls short on several AI benchmarks.
High Cost of Running GPT-4.5
Running GPT-4.5 is expensive, and OpenAI admits that it may not continue to offer it long-term. To cover these costs, OpenAI is charging $75 per million tokens (around 750,000 words) input into the model and $150 per million tokens generated by the model. This is much higher than the costs for OpenAI’s GPT-4o model, which is more commonly used.
Benefits of GPT-4.5
Even though GPT-4.5 is costly, it offers some key benefits. OpenAI claims that GPT-4.5 has a deeper understanding of the world and higher emotional intelligence. It also makes fewer mistakes, meaning it is less likely to create false information.
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Strong Rhetorical Skills
One of GPT-4.5's most impressive features is its ability to persuade other AIs. OpenAI’s internal testing found that GPT-4.5 is particularly skilled at convincing another AI to give it money or reveal secret information, showcasing its strong rhetorical abilities.