Comprehensive side-by-side LLM comparison
o3-pro offers 279.5K more tokens in context window than GPT-3.5 Turbo. GPT-3.5 Turbo is $98.00 cheaper per million tokens. o3-pro supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
OpenAI
GPT-3.5 Turbo was developed as an optimized version of GPT-3.5, designed to provide a balance of capability and efficiency for conversational and completion tasks. Built to serve as a cost-effective option for applications requiring reliable language understanding and generation, it became widely adopted for chatbots, content generation, and general-purpose AI assistance.
OpenAI
o3-pro was developed as the flagship reasoning model in the o3 family, designed to deliver maximum reasoning depth and reliability for the most challenging analytical tasks. Built for professionals requiring the highest level of thoughtful problem-solving, it extends reasoning capabilities to handle complex multi-step challenges across diverse domains.
2 years newer

GPT-3.5 Turbo
OpenAI
2023-03-21

o3-pro
OpenAI
2025-06-10
Cost per million tokens (USD)

GPT-3.5 Turbo

o3-pro
Context window and performance specifications
GPT-3.5 Turbo
2021-09-30
o3-pro
2024-05-31
Available providers and their performance metrics

GPT-3.5 Turbo
Azure
OpenAI


GPT-3.5 Turbo

o3-pro

GPT-3.5 Turbo

o3-pro
o3-pro
OpenAI