Extension:
https://chromewebstore.google.com/detail/chatwork-gpt4-chatgpt-sid/mlinajkbaceacmgohnehoopkmajnleaf
 
In Google docs™, Cohere AI™ add-on is a writing assistant, powered by powerful cohere AI(GPT3-like AI),  
finetuned-gpt-neox-20b AI(GPT3-like AI), 
t5-base-en-generate-headline AI(T5 Model), 
bart-large-cnn AI. 
Among them, the headline function uses t5-base-en-generate-headline AI, finetuned-gpt-neox-20b AI (GPT3-like AI), bart-large-cnn AI. You can choose one of the three generated results good. 
It helps you:
 generate headline. 
LinkedIn Post Generator
 Blog Post Title
 Blog Post Outline
  Blog Post Intro
   Body Paragraph
   Product Description
    Cold Outreach Email
There are more powerful features that will be launched soon!