google gemini 3.5 flash is a high-throughput multimodal model from google. It features a massive 1M token context window and native audio reasoning, making it the premier choice for fast, cost-effective, and long-form data processing tasks.
Explore the standout technical features that make google gemini 3.5 flash a leader in efficient, high-performance artificial intelligence.
Native Multimodal Reasoning
Process text, audio, and video natively. Google gemini 3.5 flash understands background noise and temporal video data without losing context.
Ultra-Low Latency Inference
Built for speed, google gemini 3.5 flash delivers tokens 40-50% faster than Pro models, making it ideal for real-time customer applications.
Efficient Context Caching
Save up to 90% on repetitive long-context queries. Google gemini 3.5 flash uses caching to store frequently accessed data for document-heavy tasks.
1M Token Context Window
Analyze huge datasets with google gemini 3.5 flash. It maintains 99%+ recall across its massive window, outperforming smaller models in document analysis.
How to Get a gemini-3.5-flash API Key
Getting a gemini-3.5-flash API key takes four steps and a few minutes. Create a free GPTProto account, add credits, generate your key, and make your first call — at $0.9 / $5.4 it's a cheaper gemini-3.5-flash API key than going direct, and one key works across every model on the platform. Full gemini-3.5-flash Documentation is in the docs.
Sign up
Create your free GPT Proto account to begin. You can set up an organization for your team at any time.
Top up
Your balance can be used across all models on the platform, including gemini-3.5-flash, giving you the flexibility to experiment and scale as needed.
Generate your API key
In your dashboard, create an API key — you'll need it to authenticate when making requests to gemini-3.5-flash.
Make your first API call
Use your API key with our sample code to send a request to gemini-3.5-flash via GPT Proto and see instant AI-powered results.
Unlike competitors, google gemini 3.5 flash is natively multimodal, handling text, audio, and video in one stream. Its 1M token context window allows for massive document analysis without losing detail. It is specifically optimized for high-speed inference, providing a much lower latency compared to larger models while maintaining high accuracy in coding and reasoning tasks across various benchmarks like MMLU and HumanEval.
How is google gemini 3.5 flash priced on GPTProto?
We offer the base google pricing: $0.075 per 1M input tokens and $0.30 per 1M output tokens for smaller prompts. For long-context tasks over 128k tokens, a slight surcharge applies. By using our API, you gain access to context caching which can reduce repetitive query costs by up to 90%, making it one of the most economical high-performance models available for enterprise-scale AI workflows and agentic applications.
Can google gemini 3.5 flash process video files?
Yes, it natively supports video content. You can upload up to an hour of video, and the model reasons across frames without needing a separate transcription or image-extraction layer. This makes it ideal for summarizing meetings, analyzing security footage, or performing sentiment analysis on visual content. It preserves temporal data far better than older models that rely on manual frame sampling or separate encoders.
Is my data used to train google gemini 3.5 flash?
No. When you access google gemini 3.5 flash through GPTProto's enterprise-grade API, your data is never used for training underlying models. We prioritize security and privacy, ensuring that your prompts and outputs remain confidential. This is critical for businesses handling sensitive customer data or proprietary codebases who want the speed of a 'flash' model without compromising their intellectual property or security.
How fast is the google gemini 3.5 flash response?
It is designed for extreme speed. The 'flash' designation refers to its optimized inference engine, which delivers a Time To First Token (TTFT) approximately 40-50% faster than the Gemini 1.5 Pro version. For most standard text prompts, users can expect latencies under 400ms. This speed makes it the perfect engine for real-time customer support bots and interactive tools where user experience depends on instant feedback.
Does it support structured outputs like JSON?
Absolutely. google gemini 3.5 flash supports structured outputs via a dedicated JSON mode. By setting the response_mime_type to application/json or using constrained output parameters, developers can ensure the model returns data in a predictable format. This is vital for integrating the model into existing software stacks, performing automated data extraction, or powering complex multi-step agentic workflows that require precise data.