Comprehensive side-by-side LLM comparison
o3 leads with 7.5% higher average benchmark score. o3 supports multimodal inputs. Overall, o3 is the stronger choice for coding tasks.
DeepSeek
DeepSeek-R1-Zero was introduced as an experimental variant trained with minimal human supervision, designed to develop reasoning patterns through self-guided reinforcement learning. Built to explore how models can discover analytical strategies independently, it represents research into autonomous reasoning capability development.
OpenAI
o3 represents the next generation in OpenAI's reasoning model series, developed to advance the capabilities of deliberate, step-by-step problem solving. Built to handle increasingly complex challenges across mathematics, science, and coding, it continues the evolution of reasoning-focused AI with improved analytical depth and accuracy.
2 months newer

DeepSeek R1 Zero
DeepSeek
2025-01-20

o3
OpenAI
2025-04-16
Context window and performance specifications
Average performance across 2 common benchmarks

DeepSeek R1 Zero

o3
o3
2024-05-31
Available providers and their performance metrics

DeepSeek R1 Zero

o3
OpenAI

DeepSeek R1 Zero

o3

DeepSeek R1 Zero

o3