What is Gemini 1.5 Pro's context window?

Gemini 1.5 Pro supports a 2,000,000-token context window — the largest of any commercially available model. Gemini 1.5 Flash supports 1,000,000 tokens.

How does Gemini tokenization work?

Gemini uses SentencePiece tokenization, similar to other Google models. This tool approximates token counts using ~1.3 tokens per word as a heuristic.

How is Gemini pricing calculated?

Gemini 1.5 Pro costs $1.25 per million input tokens and $5.00 per million output. Gemini 1.5 Flash is much cheaper at $0.075 per million input and $0.30 per million output.

Is my text sent to Google?

No. Token counting happens entirely in your browser. No text is sent to any server.

Gemini Token Counter

Count tokens for Gemini 1.5 Pro, Flash, and Gemini 1.0 Pro models.

Model

Text input

Tokens0

Words0

Characters0

Context window usage

00.0% of 2.0M

Cost estimate

Per request$0.000000

Per 1K requests$0.000000

Daily (100 req)$0.000000

Monthly est.$0.000000

0 input tokens0 output tokens

Related Tools

TKNAI Token CounterNEW

Count tokens for GPT, Claude, Gemini, and LLaMA models.

GPTOpenAI Token CounterNEW

Count tokens for GPT-4o, GPT-4 Turbo, and GPT-3.5 models.

GEMGemini API Cost CalculatorNEW

Calculate Google Gemini API costs for 1.5 Pro, Flash, and 1.0 Pro.

GMBGemini API Request BuilderNEW

Build Google Gemini API request payloads and cURL commands.

Learn More

guide:token counting guide:cost optimization

FAQ

What is Gemini 1.5 Pro's context window?: Gemini 1.5 Pro supports a 2,000,000-token context window — the largest of any commercially available model. Gemini 1.5 Flash supports 1,000,000 tokens.
How does Gemini tokenization work?: Gemini uses SentencePiece tokenization, similar to other Google models. This tool approximates token counts using ~1.3 tokens per word as a heuristic.
How is Gemini pricing calculated?: Gemini 1.5 Pro costs $1.25 per million input tokens and $5.00 per million output. Gemini 1.5 Flash is much cheaper at $0.075 per million input and $0.30 per million output.
Is my text sent to Google?: No. Token counting happens entirely in your browser. No text is sent to any server.

Count tokens for Google Gemini models including Gemini 1.5 Pro (2M context), Gemini 1.5 Flash, and Gemini 1.0 Pro. See context window usage and per-request cost estimate. Uses word-based heuristics — results are approximate.