Count tokens for Gemini 3.5 Flash and estimate API cost before you send a request. Google does not publish this tokenizer, so counts are calibrated estimates for planning.Your text never leaves the browser.
Paste your prompt into the counter on this page. Google does not publish the Gemini 3.5 Flash tokenizer, so the count is a calibrated estimate based on text length, language, and structure. Treat it as planning guidance rather than an exact billing number.
How much does Gemini 3.5 Flash cost per token?
Gemini 3.5 Flash costs $1.50 per 1 million input tokens and $9.00 per 1 million output tokens, based on official Google pricing checked 2026-08-11.
What is the context window of Gemini 3.5 Flash?
Gemini 3.5 Flash has a context window of 1,048,576 tokens, which is roughly 786,000 English words of combined prompt and response. The counter above shows how much of that window your text consumes.
Is this Gemini 3.5 Flash token count exact?
No. It is a clearly labeled estimate, because Google has not released a public tokenizer for Gemini 3.5 Flash. Estimates are usually within a reasonable range for English text but can drift for code, JSON, or non-English languages.