Context Window Calc

Estimate token counts, visualize context usage, and calculate API costs.

System Prompt 0 tkns

Conversation History 0 tkns

User Message 0 tkns

Model	Context Window	Input (1M)	Output (1M)

Target Model 🤖

Context Usage 0.0%

75%

90%

128k

$0.0000

Assuming $0.00 per 1M tokens

* Token counts are approximations using a basic ~1.3 tokens-per-word heuristic. Actual tokenizer counts (tiktoken, sentencepiece) will vary.