Gemini 2.5 Flash API - Pricing, Quickstart & Provider Comparison

Gemini 2.5 Flash is Google's model designed for high-volume, latency-sensitive tasks requiring reasoning, making it distinct from earlier versions and alternatives like Flash Lite and Pro. It supports multiple input types, including text, code, images, audio, video, and documents, though it does not generate audio or images. The model features a "thinking budget" parameter that controls internal reasoning depth, with dynamic and fixed options affecting response quality and cost. Pricing varies across providers like Google AI Studio, Vertex AI, and OpenRouter, with the latter offering seamless provider switching and integrated billing but charging a platform fee. OpenRouter facilitates the use of Gemini 2.5 Flash across multiple Google providers, allowing users to switch models without altering client code, and offers enterprise-level controls and analytics. While the model does not support audio or image generation, it offers advantages in reasoning tasks with a large context window and configurable thinking, although it is scheduled for discontinuation in October 2026.

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