OpenAI Launches GPT-4.5: Its Largest and Most Advanced AI Model Yet.
OpenAI has unveiled GPT-4.5, its most powerful AI model to date, marking a significant leap in multimodal capabilities and enterprise applications. The announcement, made during a live-streamed event, confirms rumors that have circulated since leaked internal documents hinted at a mid-tier update bridging GPT-4 and the anticipated GPT-5.
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The new model reportedly processes text, images, audio, and video simultaneously, with OpenAI claiming a 40% improvement in contextual understanding compared to GPT-4. Early access partners, including Duolingo and Salesforce, have already integrated GPT-4.5 into their platforms. “This isn’t just an iteration—it’s a reimagining of how AI can interpret cross-modal data,” said OpenAI CTO Mira Murati during the demo, which showcased real-time multilingual podcast transcription paired with mood analysis through vocal tone.
Critics quickly noted parallels to Google’s Gemini Ultra and Anthropic’s Claude 3.5, particularly regarding energy efficiency. GPT-4.5’s “dynamic throttling” feature, which reduces computational load by 30% during low-priority tasks, addresses growing concerns about AI’s environmental footprint. However, the model’s 25 trillion parameters—nearly double GPT-4’s—have reignited debates about AI centralization.
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The launch coincides with leaked EU regulatory documents proposing stricter oversight of “frontier models.” OpenAI confirmed GPT-4.5 will include built-in compliance tools for GDPR and California’s AI Accountability Act, though digital rights groups argue the self-policing mechanisms lack transparency.
Enterprise pricing starts at $0.012 per 1k tokens, while free-tier users gain limited access via ChatGPT’s “Explore” mode starting June 2025. OpenAI CEO Sam Altman emphasized, “GPT-4.5 isn’t just about scale—it’s about creating AI that adapts to human context, not the other way around.”
