OpenAI's newest GPT-4.5 model, released on February 27, 2025, is a groundbreaking AI with 12.8 trillion parameters and a 128K-token context window. It features advanced general knowledge, enhanced emotional intelligence, multimodal input processing (text and image),sophisticated function calling, and real-time streaming responses. Initially rolled out for ChatGPT Pro users, with later availability for Plus and Team subscribers, it delivers responses at approximately 37 tokens per second, making it an excellent choice for tasks requiring high-level reasoning and emotional depth.
The OpenAI o3-mini is a high-speed, cost-effective reasoning model designed for STEM applications, with strong performance in science, mathematics, and coding. Launched in January 2025, it includes essential developer features such as function calling, structured outputs, and developer messages. The model offers three reasoning effort levels—low, medium, and high—allowing users to optimize between deeper analysis and faster response times. Unlike the o3 model, it lacks vision capabilities. Initially available to select developers in API usage tiers 3-5, it can be accessed via the Chat Completions API, Assistants API, and Batch API.
| GPT-4.5 | o3-mini | |
|---|---|---|
Provider | ||
Web Site | ||
Release Date | Feb 27, 2025 1 month ago | Jan 31, 2025 2 months ago |
Modalities | text images | text |
API Providers | OpenAI, Azure OpenAI Service | OpenAI API |
Knowledge Cut-off Date | 2023-10 | Unknown |
Open Source | No | No |
Pricing Input | $75.00 per million tokens | $1.10 per million tokens |
Pricing Output | $150.00 per million tokens | $4.40 per million tokens |
MMLU | Not available | 86.9% pass@1, high effort Source |
MMLU Pro | Not available | Not available |
MMMU | 74.4% Source | Not available |
HellaSwag | Not available | Not available |
HumanEval | Not available | Not available |
MATH | Not available | 97.9% pass@1, high effort Source |
GPQA | 71.4% science Source | 79.7% 0-shot, high effort Source |
IFEval | Not available | Not available |
Mobile Application |
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