Gemini 2.5 Flash Preview 09-25 vs Gemini 2.5 Flash Preview 05-20

When comparing the Gemini 2.5 Flash Preview 09-25 and 05-20 AI models by Google, the key differences lie in pricing and release date. The 09-25 model offers a cost-effective solution with pricing at $0.3/M input and $2.5/M output tokens, while the 05-20 model comes at a lower cost with pricing set at $0.15/M input and $0.6/M output tokens. For developers looking for a budget-friendly option without compromising on capabilities, the Gemini 2.5 Flash Preview 05-20 is the ideal choice.