Gemini 2.5 Pro vs Gemini 3.5 Flash API Price Comparison

Gemini 2.5 Pro
Official
$1.2500
/ 1M tokens
Best Price
$1.2500
/ 1M tokens
5 providers · 1000K Context · 👁 Vision
Gemini 3.5 Flash
Official
$1.5000
/ 1M tokens
Best Price
$1.5000
/ 1M tokens
4 providers · 1000K Context · 👁 Vision
At official prices, Gemini 2.5 Pro is ~17% cheaper. At the best relay price, Gemini 2.5 Pro is ~17% cheaper.

Price Comparison

Gemini 2.5 ProGemini 3.5 Flash
Official input / 1M tokens$1.2500$1.5000
Official output / 1M tokens$10.0000$9.0000
Cheapest input / 1M tokens$1.2500$1.5000
Cheapest output / 1M tokens$10.0000$9.0000
providers54
Context1000K1000K
Vision

Gemini 2.5 Pro — All Providers

Detail page →
ProviderInput / 1MAPI
Official
Google AIOfficial🌐VisaMCGCP👁Live
$1.2500
Try →
Relay / Aggregator
OpenRouterRelayLowest🌐VisaMCCrypto👁Live
$1.2500
Try →
YunWu AIRelay🇨🇳支付宝微信MediumLive
Try →

Gemini 3.5 Flash — All Providers

Detail page →
ProviderInput / 1MAPI
Official
Google AIOfficial🌐VisaMCGCP👁Live
$1.5000
Try →
Relay / Aggregator
302.AIRelayLowest🇨🇳支付宝微信Live
$1.5000
Try →
OpenRouterRelayLowest🌐VisaMCCrypto👁Live
$1.5000
Try →
YunWu AIRelay🇨🇳支付宝微信MediumLive
Try →

Frequently Asked Questions

Which is cheaper, Gemini 2.5 Pro or Gemini 3.5 Flash?

At official price, Gemini 2.5 Pro is cheaper by ~17%. At the best relay price, Gemini 2.5 Pro with a ~17% difference.

What context window do Gemini 2.5 Pro and Gemini 3.5 Flash support?

Gemini 2.5 Pro has a 1000K token context window; Gemini 3.5 Flash has 1000K tokens.

Do Gemini 2.5 Pro and Gemini 3.5 Flash support image input?

Gemini 2.5 Pro supports image input; Gemini 3.5 Flash supports image input.

What is the cheapest way to access Gemini 2.5 Pro or Gemini 3.5 Flash?

Gemini 2.5 Pro's lowest input price is $1.2500/1M tokens (OpenRouter). Gemini 3.5 Flash's is $1.5000/1M tokens (302.AI). Relay providers typically offer lower prices with different SLA terms.

Related

Gemini 2.5 Pro API PricesGemini 3.5 Flash API PricesAll Language Model APIs
← Back to AI API Pricing