Introducing o3 and o4-mini – ChatGPT’s Biggest Upgrade Yet
Introducing o3 and o4-mini: ChatGPT’s new reasoning powerhouses
OpenAI just launched its most significant ChatGPT upgrade yet, and it’s changing how we interact with AI. The company released three new models – o3, o4-mini, and o4-mini high – which are designed as “reasoning models” that think before responding.
What’s changing?
These new models are replacing older ones:
- o3 replaces o1
- o1 Pro mode will eventually be phased out
- The original GPT-4 from 2023 will be sunset this month
According to OpenAI’s benchmarks, o4-mini is generally the best performer, with o4-mini high being the premium option. In coding competitions, o4-mini scores high enough to rank among the top 200 coders globally. Interestingly, o3 sometimes outperforms o4-mini in visual reasoning tasks.
New capabilities that make these models special
The most impressive feature is how these models integrate ChatGPT’s full toolset without requiring specific instructions:
- Automatic web searches – The AI decides when to search the web to answer questions
- Visual reasoning – It can analyze images with impressive detail (like identifying ships in a harbor photo and researching their destinations)
- Memory integration – Works with ChatGPT’s recently launched memory feature to personalize responses based on previous conversations
- Image generation – Creates visuals when helpful, using GPT-4’s image generator
- Document analysis – Processes uploaded files and images
Real-world performance improvements
The difference is striking when you compare these new models to their predecessors:
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