Free tool

Gemini context window calculator

Plan source, prompt, and answer room for Gemini before exporting a large AI context bundle.

Gemini 3.7 Flash budget planner

Gemini 3.7 Flash supports a 1M-token context window and up to 64K output tokens. Google's current default model.

1,048,576 tokens

Gemini 3.7 Flash 1.0M Gemini 3.1 Pro 1.0M

Source context tokens Prompt and instructions Reserved answer room

Used 0

Remaining 0

Status Ready

Source: Google documentation. Last reviewed 2026-09-08. Prices reviewed 2026-09-08.

What Gemini models does this calculator cover?

It shows Gemini 3.7 Flash and Gemini 3.1 Pro, both with 1M-token context windows. Select a variant to plan your specific budget.

Does a huge Gemini window mean I should upload everything?

No. Large windows help, but irrelevant files still create noise. Curated context remains better than a full project dump.

Can Riflet build a Gemini Gems context file?

Yes. Riflet can export a portable Markdown or text bundle from mixed sources that you can use with Gemini workflows.

Can I change the numbers?

Yes. The calculator fields are editable so you can plan around the specific Gemini model or product limit you use.