All models

o1 vs GPT-5 thinking

Detailed comparison of capabilities, features, and performance.

Feature
o1
GPT-5 thinking
Model Image
o1
GPT-5 thinking
AI Lab
OpenAI
OpenAI
Context Size
128,000 tokens
272,000 tokens
Max Output Size
100,000 tokens
128,000 tokens
Frontier Model
Yes
Yes
Vision Support
No
Yes
Description
o1 is OpenAI's new reasoning model for complex tasks that require broad general knowledge
OpenAI's flagship model configured for longer thinking.

Learn more about o1

View detailed specifications and capabilities

View model details →

Learn more about GPT-5 thinking

View detailed specifications and capabilities

View model details →

More model comparisons

GPT-4o GPT-4o
VS
GPT-5 thinking GPT-5 thinking
GPT-4o mini GPT-4o mini
VS
GPT-5 thinking GPT-5 thinking
o3-mini o3-mini
VS
GPT-5 thinking GPT-5 thinking
o3-mini-high o3-mini-high
VS
GPT-5 thinking GPT-5 thinking

Try both models in your workspace

Access both o1 and GPT-5 thinking in a single workspace without managing multiple API keys.

Create your workspace