All comparisons

Gemini 2.5 Pro vs o3

Side-by-side comparison of specifications, capabilities, and pricing.

	Gemini 2.5 Pro Google DeepMind	o3 OpenAI
Released	2025-06-17	2025-03-31
Context window	1M	128K
Parameters	—	—
Architecture	decoder only	decoder only
License	Proprietary	Unknown
Knowledge cutoff	2025-01	—
Capabilities
Vision
Multimodal
Reasoning
Function calling
Tool use
Structured Outputs
Code execution
Availability
Providers	Google AI StudioGCP Vertex AIOpenRouter	OpenAI APIOpenRouterOpenAI Batch API

Benchmarks

HumanEval93.196.7SWE-bench Verified63.271.7LiveCodeBench70.479.1Chatbot Arena1398.01412.0Google-Proof Q&A86.487.7MMLU PRO86.2—Aider Polyglot—81.3Massive Multi-discipline Multimodal Understanding—82.9