AI terms: An AI glossary for humans
The Zapier Blog
JULY 11, 2025
A2A A2A is an open agent-to-agent protocol (pioneered by Google) that enables independent AI agents to exchange messages and delegate tasks so they can collaborate seamlessly. GPT-1 was launched all the way back in 2018, but it was nothing like the GPT models we have access to now. GPT models power ChatGPT and many other AI tools.
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