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Showing 1–4 of 4
make real
tldraw
Draw a user interface on a canvas and a vision model turns it into working HTML; uses your own API key.
Claude Token Counter
Simon Willison
Counts tokens for text and image attachments across several Claude models using Anthropic token-counting API and your key.
llm-lib Demo
Try one JavaScript library against OpenAI, Anthropic or Gemini models by picking a provider and pasting a key.
OpenAI Prompt Caching Playground
Sends prompts with different structures to OpenAI and shows how many tokens were served from cache.