OpenAI has officially launched GPT-4.5, its most advanced AI model to date, under the codename Orion. Built with significantly greater computing power and data than previous models, GPT-4.5 represents a step forward in AI development. Starting this week, GPT-4.5 will be available to ChatGPT Pro subscribers at $200 per month. Other ChatGPT users, including those on Plus and Team plans, are expected to receive access next week.
The release of GPT-4.5 has sparked industry-wide anticipation, as experts analyze whether traditional AI training methods remain viable. Using similar scaling techniques as its predecessors, GPT-4.5 expands upon past models with enhanced world knowledge and improved emotional intelligence. However, some benchmarks indicate diminishing returns from this approach, as newer reasoning models from OpenAI and competitors like DeepSeek and Anthropic outperform GPT-4.5 in some key areas.
Operational costs for GPT-4.5 are exceptionally high, leading OpenAI to reconsider its long-term API availability. Developers are charged $75 per million input tokens and $150 per million output tokens — dramatically more expensive than GPT-4o, OpenAI’s flagship model.
While GPT-4.5 excels in factual accuracy and creative capabilities, it is not a direct replacement for GPT-4o. It lacks features like ChatGPT’s advanced two-way voice mode but offers improved performance in other areas, such as coding and complex problem-solving. Notably, in AI-generated graphics and emotionally intelligent responses, GPT-4.5 outperforms its predecessors.
Despite its advancements, GPT-4.5 reinforces concerns about the limits of AI scaling. OpenAI is now shifting towards reasoning models, recognizing that pre-training methods alone may no longer yield exponential improvements. As the company prepares for GPT-5, GPT-4.5 serves as an important milestone, highlighting both the possibilities and limitations of current AI training techniques.
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