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OpenAI's o3 and o4-mini Models for Smarter AI

OpenAI has launched its latest AI models, o3 and o4-mini, marking a significant upgrade in the company's offerings. According to Greg Brockman of OpenAI, these models "feel incredibly smart" and are already demonstrating potential in generating novel ideas for top scientists. These models are designed to provide better access to tools and enhance the ability to discern when to use them, ultimately delivering more practical value. The focus is on effective tool utilization, stringing tasks together, and maintaining persistence, which are key strengths of the o3 model. Sam Altman has announced the forthcoming release of o3-pro to the pro tier in the coming weeks.

The o3 model, in particular, is highlighted for its capabilities and tool use. It excels in scenarios requiring image generation, with or without reasoning, provided o3 has the necessary tools. It has been used to answer questions and helps with writing its own review. However, concerns have been raised regarding the naming conventions, with confusion surrounding the relationship between models like 4o-mini, o4-mini, and o4-mini-high. Usage is limited to 50 queries a week for o3, 150 a day for o4-mini and 50 a day for o4-mini-high for plus users, with 10 Deep Research queries per month.

The o3 and o4-mini models bring smarter tools and faster reasoning to ChatGPT, allowing the models to decide when to invoke web search, Python, file analysis, or image generation tools, finishing multi-step tasks in under a minute. The models can also "think with images," accepting sketches or screenshots and adjusting them during reasoning. O3 sets new highs on Codeforces and SWE‑bench and makes 20% fewer major errors than o1, while the leaner o4‑mini scores 99.5% pass‑at‑1 on the 2025 AIME with tools and offers higher rate limits. The new features are currently available to Pro and Team subscribers, with Enterprise, Education tiers and API access to follow soon.

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References :
  • thezvi.wordpress.com: Thezvi WordPress post discussing OpenAI's o3 and o4-mini models.
  • Interconnects: Interconnects.ai article about OpenAI's o3 over-optimization.
  • TestingCatalog: testingcatalog.com article about OpenAI's o3 and o4-mini bringing smarter tools and faster reasoning to ChatGPT
  • thezvi.wordpress.com: OpenAI has finally introduced us to the full o3 along with o4-mini. Greg Brockman (OpenAI): Just released o3 and o4-mini! These models feel incredibly smart. We’ve heard from top scientists that they produce useful novel ideas. Excited to see their …
  • www.techrepublic.com: OpenAI’s New AI Models o3 and o4-mini Can Now ‘Think With Images’
  • bdtechtalks.com: OpenAI's new reasoning models, o3 and o4-mini, enhance problem-solving capabilities and tool use, making them more effective than their predecessors.
  • bdtechtalks.com: What to know about o3 and o4-mini, OpenAI’s new reasoning models
  • THE DECODER: OpenAI has made the Deep Research tool in ChatGPT available to free-tier users. Access is limited to five uses per month, using a lightweight version based on the o4-mini-model.
  • TestingCatalog: OpenAI may have increased the o3 model's quota to 50 messages/day and added task-scheduling to o3 and o4 Mini. An "o3 Pro" tier might be on the horizon.
  • www.tomsguide.com: OpenAI has unveiled a cheaper but less effective deep research tool that'll be used across tiers and also available for free.
  • TestingCatalog: OpenAI tests Deep Research Mini tool for free ChatGPT users
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