GPT-4o vs Gemini 3.5 Flash API Price Comparison
Prices updated: ·90 quotes
As of : At official rates, GPT-4o is $2.5000/1M input tokens and Gemini 3.5 Flash is $1.5000 — Gemini 3.5 Flash is ~40% cheaper than GPT-4o. Via relay providers, the lowest GPT-4o rate is $0.0828 (PoloAPI) and Gemini 3.5 Flash is $0.0621 (TreeRouter). Context windows: GPT-4o 131K, Gemini 3.5 Flash 1000K. GPT-4o and Gemini 3.5 Flash support image input. 90 provider quotes tracked (GPT-4o: 76, Gemini 3.5 Flash: 14), updated daily.
GPT-4oMid-tier
Official
$2.5000
/ 1M tokens
Best Price
$0.0828
/ 1M tokens
76 providers · 131K Context · 👁 Vision
Gemini 3.5 FlashMid-tier
Official
$1.5000
/ 1M tokens
Best Price
$0.0621
/ 1M tokens
14 providers · 1000K Context · 👁 Vision
At official prices, Gemini 3.5 Flash is ~40% cheaper. At the best relay price, Gemini 3.5 Flash is ~25% cheaper.
Price Comparison
| GPT-4o | Gemini 3.5 Flash | |
|---|---|---|
| Official input / 1M tokens | $2.5000 | $1.5000 ✓ |
| Official output / 1M tokens | $10.0000 | $9.0000 ✓ |
| Cheapest input / 1M tokens | $0.0828 | $0.0621 ✓ |
| Cheapest output / 1M tokens | $0.0517 ✓ | $0.3724 |
| providers | 76 | 14 |
| Context | 131K | 1000K |
| Vision | ✓ | ✓ |
GPT-4o — All Providers
Detail page →Gemini 3.5 Flash — All Providers
Detail page →Frequently Asked Questions
Which is cheaper, GPT-4o or Gemini 3.5 Flash?
At official price, Gemini 3.5 Flash is cheaper by ~40%. At the best relay price, Gemini 3.5 Flash with a ~25% difference.
What context window do GPT-4o and Gemini 3.5 Flash support?
GPT-4o has a 131K token context window; Gemini 3.5 Flash has 1000K tokens.
Do GPT-4o and Gemini 3.5 Flash support image input?
GPT-4o supports image input; Gemini 3.5 Flash supports image input.
What is the cheapest way to access GPT-4o or Gemini 3.5 Flash?
GPT-4o's lowest input price is $0.0828/1M tokens (PoloAPI). Gemini 3.5 Flash's is $0.0621/1M tokens (TreeRouter). Relay providers typically offer lower prices with different SLA terms.
Related Comparisons
Related