Comprehensive side-by-side LLM comparison
o3-pro offers 283.6K more tokens in context window than DeepSeek-V2.5. DeepSeek-V2.5 is $99.58 cheaper per million tokens. o3-pro supports multimodal inputs. DeepSeek-V2.5 is available on 3 providers. Both models have their strengths depending on your specific coding needs.
DeepSeek
DeepSeek-V2.5 was developed as an enhanced iteration of the DeepSeek-V2 architecture, designed to incorporate improvements in model quality and efficiency. Built to advance the DeepSeek foundation model series, it provides refined capabilities for general-purpose language understanding and generation tasks.
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.
1 year newer

DeepSeek-V2.5
DeepSeek
2024-05-08

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

DeepSeek-V2.5

o3-pro
Context window and performance specifications
o3-pro
2024-05-31
Available providers and their performance metrics

DeepSeek-V2.5
DeepInfra
DeepSeek
Hyperbolic

DeepSeek-V2.5

o3-pro

DeepSeek-V2.5

o3-pro

o3-pro
OpenAI