Write LinkedIn Posts withOpus 5.5

Yes. You can write 2 posts a day with no account. Sign in with Google, still free, for 10 a day. A post that fails does not count. The notes box takes 1,000 characters, and a source article can be up to 30,000.

Give it something only you know. A post reads as AI when it could have been written about anyone, so put the specifics in your notes: the name of the thing, the number, what went wrong, what you think about it. The model is told to take its facts only from your notes, so the more of them you give, the less generic the post. Then pick a persona whose voice fits, and read the post before you publish it. Our longer take is in How to Write with AI Without Losing Your Voice.

What happened, with the names, numbers and dates, and what you think of it, in whatever order they come to you. Bullet points are fine, and so is one line. It works out from the notes what kind of post it is: news such as a new job, a project you built, a launch update, a lesson learned, an opinion, or a response to something you read.

Yes, in the notes. Write “keep it short”, “end with a question” or “add three hashtags” along with the rest, and the post follows it. Left alone, it adds no hashtags and no Markdown, which LinkedIn does not display.

The voice the post is written in, picked at the bottom left; switch and press Write post again to compare. Builder (“shipped, learned, what's next”), the default, is a young builder posting their work in public, casual and happy to go into the details. Marketer (“upbeat launch copy”) is bubbly and upbeat, with short lines and an emoji or two. Journalist (“a neutral news report”) is a veteran reporter, brief and hard to impress. Storyteller (“scene first, point later”) opens on a moment and takes its time. No persona writes your notes plainly. How long a post runs depends on the voice, not a word count. Marketer, Journalist and Storyteller are also presets in the StashBase app, where you can keep a Custom persona worked out from your own past posts.

Yes. Pick one of the 32 languages in the menu above the post and press Write post again; left alone, it writes in the language of your notes. Notes in Chinese can become a post in English. Have someone who reads the language check the post before you publish it.

Yes. Open “Add a source article” and paste the post or article, or give it a link to fetch, then write in your notes what you make of it. The post names the author and makes your view the point. Say what you think in the notes; a post that only restates someone else's is the kind readers scroll past.

It is told to take every fact from your notes and the source: no invented numbers, names, results or quotes. The voice is its own, so a persona adds reactions and asides in character, and it can join two of your points in a way you did not mean. Read the post against your notes before you publish it.

Not necessarily. If you pay for Claude, you can paste the same notes into a chat and ask for a LinkedIn post; this page saves you writing the prompt, gives you the voices to switch between, and runs on Opus 5.5 at no cost to you. Where a chat falls short is your own material: past posts, drafts and sources in files on your computer. StashBase is a free, local-first writing workspace where Claude Code or Codex works beside those files, so a post can draw on what you have already written.

Claude Opus 5.5, from Anthropic. It thinks for a moment about how to tell the post before it writes, so a post takes a few seconds.

No. Your notes and source go through our Cloudflare Worker to Anthropic's Claude API, which writes the post. The Worker logs lengths and the tokens used, never the text. See our privacy policy.