Gemini 2.5 Flash vs GPT-4o

Detailed comparison of capabilities, features, and performance.

Gemini 2.5 Flash

Gemini 2.5 Flash

Google
VS
GPT-4o

GPT-4o

OpenAI
Feature Gemini 2.5 Flash GPT-4o
AI Lab Google OpenAI
Context Size 1,048,576 tokens 128,000 tokens
Max Output Size 64,000 tokens 4,096 tokens
Frontier Model No Yes
Vision Support Yes Yes
Description Multimodal model that is fast, token efficient and performant for complex tasks. 1M context window. The Omni model from OpenAI that reasons across audio vision and text

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