Prompt Astra

Free AI Writing Tools

Chat assistants for drafts, docs, emails and everyday thinking. What the free plans include and the limits you will hit first.

ToolOn the free planThe catch
ChatGPTby OpenAIUnlimited everyday text chats on GPT-5.6 Luna, the smallest GPT-5.6 model, plus web search, image generation, file uploads, voice mode, and limited Codex.You only get the small Luna model. Images, uploads, Deep Research, voice and Codex run against a usage limit OpenAI does not publish, and free chats are used for training by default.

Every write astra

  • Write

    ChatGPT

    by OpenAI

    Chat assistant for code help, debugging, quick research, and generating text or images.

    Unlimited text chats on the small GPT-5.6 Luna model, plus limited images and Codex.

    The catch

    Small model only, unpublished limits on images and Codex, and training is on by default.

    Full ChatGPT breakdownOpen ChatGPT