OpenAI to Retire GPT-4.5 API Access by July: What Developers Need to Know
OpenAI announced on Monday that it will phase out API access to GPT-4.5, its largest AI model to date, by July 14, 2025. The model, released just months ago in February, will remain available in ChatGPT for paying subscribers but will no longer be supported for API integrations.
Key Details of the Transition
- Timeline: Developers must migrate from GPT-4.5 by July 14, 2025.
- Replacement Model: OpenAI recommends GPT-4.1, its newly launched alternative, which promises comparable or better performance at a lower cost.
- Reason for Deprecation: High operational costs and a focus on future model development.
Why Is OpenAI Phasing Out GPT-4.5?
GPT-4.5, internally codenamed Orion, was OpenAI’s most computationally intensive model, trained with unprecedented data and processing power. While it outperformed predecessors like GPT-4o in areas like persuasive writing and complex reasoning, it fell short of “frontier-level” benchmarks in other domains.
Additionally, running GPT-4.5 proved prohibitively expensive:
- Pricing: \(75 per million input tokens (~750,000 words) and \)150 per million output tokens.
- Cost Concerns: OpenAI had previously hinted at reevaluating its API availability due to high infrastructure demands.
What’s Next for Developers?
OpenAI’s shift to GPT-4.1 reflects a strategic pivot toward cost efficiency and scalability. The company emphasizes that GPT-4.1 delivers similar (or superior) capabilities for most use cases while reducing operational overhead.
Key Takeaways:
- GPT-4.5 remains accessible in ChatGPT Plus/Enterprise but will be removed from the API.
- Developers should begin transitioning to GPT-4.1 or explore other OpenAI models.
- Future updates will likely prioritize optimization over raw scale.
For the latest guidance, OpenAI encourages users to review its API documentation and migration resources.
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