Hello Ficiency, the free api is just for testing, you can use a max of 10k characters per request, but you only have 10k characters per month, so a single request of 10k characters would be the entire usage for the month. The information on the pricing page is fully up to date. ~1500 words assuming 7 characters on average per word including spaces.

• Smodin

How many words / calls / characters do I have?
Each request has a maximum of 10,000 characters. Typically 1,000 characters is 200-400 words, so a max request can be 2,000-4,000 words.

This information is on your “about” section, and this does not match with my experience right now.