Gemini 3 Pro Preview vs o3 Deep Research: side-by-side summary

Gemini 3 Pro Preview and o3 Deep Research are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Gemini 3 Pro Preview, from Google, has a 1,048,576-token context window and is priced by the provider serving it on OpenRouter.

o3 Deep Research, from OpenAI, has a 200,000-token context window and is priced by the provider serving it on OpenRouter.

Context window

• Gemini 3 Pro Preview: 1,048,576 tokens
• o3 Deep Research: 200,000 tokens

Price

• Gemini 3 Pro Preview: Pricing varies by provider
• o3 Deep Research: Pricing varies by provider

Provided by

• Gemini 3 Pro Preview: Google
• o3 Deep Research: OpenAI

• Gemini 3 Pro Preview model details, providers and pricing
• o3 Deep Research model details, providers and pricing