Jeff Grimes(@jeffgrimes9):This website adds instant fact-check annotations to each sentence in a speech. I asked my Product Builder teammate in Perplexity to make "spellcheck for facts" and it built this site, which cuts your audio into sentences as you're speaking, then sends each sentence to the Perplexity Decisions API, using its new web grounding feature and passing the prompt "is this claim true?". In this demo, each sentence was checked against web sources in about 0.8 seconds, and the entire sequence cost less than 3/4 of a cent in Decisions API credits. Try it:

2026.11.09 15:56

This website adds instant fact-check annotations to each sentence in a speech. I asked my Product Builder teammate in Perplexity to make "spellcheck for facts" and it built this site, which cuts your audio into sentences as you're speaking, then sends each sentence to the Perplexity Decisions API, using its new web grounding feature and passing the prompt "is this claim true?". In this demo, each sentence was checked against web sources in about 0.8 seconds, and the entire sequence cost less than 3/4 of a cent in Decisions API credits. Try it: