Gemini 3.1 Flash Lite vs Sonar Pro Search: side-by-side summary

Gemini 3.1 Flash Lite and Sonar Pro Search are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Gemini 3.1 Flash Lite, from Google, has a 1,048,576-token context window and is priced at $0.25/M tokens input, $1.50/M tokens output on OpenRouter.

Sonar Pro Search, from Perplexity, has a 200,000-token context window and is priced at $3/M tokens input, $15/M tokens output on OpenRouter.

Context window

• Gemini 3.1 Flash Lite: 1,048,576 tokens
• Sonar Pro Search: 200,000 tokens

Price

• Gemini 3.1 Flash Lite: $0.25/M tokens input, $1.50/M tokens output
• Sonar Pro Search: $3/M tokens input, $15/M tokens output

Provided by

• Gemini 3.1 Flash Lite: Google
• Sonar Pro Search: Perplexity

• Gemini 3.1 Flash Lite model details, providers and pricing
• Sonar Pro Search model details, providers and pricing