Comprehensive side-by-side LLM comparison
Gemini 2.5 Pro leads with 35.3% higher average benchmark score. Gemini 2.5 Pro offers 708.2K more tokens in context window than o1. Gemini 2.5 Pro is $63.75 cheaper per million tokens. Overall, Gemini 2.5 Pro is the stronger choice for coding tasks.
Google DeepMind
Gemini 2.5 Pro, released by Google in May 2025, is a large language model from the Gemini 2.5 family designed for complex reasoning, coding, and long-context analysis tasks. It features a 1M token context window, native support for text, image, video, and audio input, and integrated thinking capabilities for multi-step problem solving. Gemini 2.5 Pro targets advanced coding workflows, scientific reasoning, and applications requiring deep understanding across large, mixed-modality contexts.
OpenAI
OpenAI o1, released by OpenAI in December 2024, is a reasoning-focused large language model that applies extended chain-of-thought processing before generating responses. It features a 200K token context window and native image understanding, demonstrating strong performance on STEM benchmarks requiring multi-step reasoning. o1 targets mathematics, science, and coding tasks where careful deliberation over the problem produces more accurate outputs than direct generation.
5 months newer

o1
OpenAI
2024-12-05

Gemini 2.5 Pro
Google DeepMind
2025-05-20
Cost per million tokens (USD)
Gemini 2.5 Pro
o1
Context window and performance specifications
Average performance across 2 common benchmarks
Gemini 2.5 Pro
o1
Performance comparison across key benchmark categories
Gemini 2.5 Pro
o1
o1
2023-10
Available providers and their performance metrics
Gemini 2.5 Pro
Google Cloud Vertex AI
o1
Gemini 2.5 Pro
o1
Gemini 2.5 Pro
o1
OpenAI