- OpenAI is releasing interim models o3 and o4-mini in April 2025 before launching GPT-5 “in a few months.”
- The staggered release will help OpenAI solve integration challenges and build capacity for “unprecedented demand.”
- OpenAI faces intense competition from Google’s Gemini 2.5 Pro, DeepSeek R2, Grok-3, and Claude 3.7 Sonnet, with some offering better pricing.
OpenAI CEO Sam Altman announced a significant change to the company’s AI model release schedule on Friday, April 4, 2025. Two intermediate models—o3 and o4-mini—will now be released "in a couple of weeks" ahead of the highly anticipated GPT-5, which has been pushed back "a few months," according to Altman’s post on X.
"Change of plans: We are going to release o3 and o4-mini after all, probably in a couple of weeks, and then do GPT-5 in a few months," wrote Altman. The sudden shift comes as OpenAI struggles with technical complexity in developing its flagship model.
Technical Challenges and Market Pressure
Altman acknowledged integration difficulties as one reason for the schedule change, stating the company "found it harder than we thought it was going to be to smoothly integrate everything" into GPT-5. The phased approach will also help ensure sufficient capacity "to support what we expect to be unprecedented demand."
The decision places OpenAI in an increasingly competitive AI landscape. Google recently launched Gemini 2.5 Pro with 1 million tokens of context, which has earned recognition as the best reasoning and coding model currently available—and offered for free. Meanwhile, DeepSeek R2, Grok-3, and Claude 3.7 Sonnet with extended thinking capabilities are all approaching release, each at lower price points than OpenAI’s offerings.
Pricing Concerns and Enhanced Development
The company’s most recent release, the reasoning-focused o1 Pro, arrived with substantial pricing: $150 per million tokens for input and $600 per million tokens generated—double the input cost of GPT-4.5 and ten times the price of regular o1. For comparison, DeepSeek R1 costs less than $1 per million tokens.
Despite the delay, Altman highlighted a potential benefit: "The most exciting [reason] is that we are going to be able to make GPT-5 much better than we originally thought." The eventual GPT-5 is expected to be fully multimodal, combining all of OpenAI’s specialized models into a unified system capable of handling reasoning, language processing, and image generation without switching between different models.
While technical specifications for o3 and o4-Mini remain undisclosed, they will serve as stepping stones between GPT-4 and the forthcoming GPT-5. This revised roadmap arrives shortly after OpenAI secured a historic $40 billion funding round—reportedly the largest single fundraising event by any private technology company.
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