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MultipleChat's Prompt Optimizer rewrites your message into a clearer, more specific instruction before you send it to ChatGPT, Claude, Gemini or Grok. You see the result, adjust it, and send. Included in the Pro plan.
Most weak answers come from short prompts that leave the model guessing. It fills the gaps with the most generic version of what you asked for.
Missing goal
"Write about remote work" could mean a blog post, a policy or a tweet. The model picks one.
Missing context
Without knowing who the answer is for, the model writes for no one in particular.
Missing format
No length or structure means a wall of text you then have to reshape by hand.
Four steps, all inside the MultipleChat message box. Nothing is sent until you choose to send it.
Type your request in the message input as you normally would. The Optimize button activates once you've typed something.
A window opens showing the rewritten prompt in an editable text box.
Click chips such as Audience, Tone, Length, Structure, Images or Sources to append a placeholder line, then fill it in.
Edit the text if needed, then click Use to replace your original message, or Use & Send to replace and send it immediately.
An illustrative example of a rough prompt and an optimized version. Real rewrites depend on what you type.
explain SEO
Typical result
A textbook definition of SEO, pitched at no one in particular, that you then have to follow up on with two or three more prompts.
Explain what search engine optimization (SEO) is and how it works. Cover the three main areas: on-page, technical and off-page SEO. Give one simple example for each, then list three first steps a beginner can take. Use short sections with headings and bullet points.
Audience: [small business owner, no technical background]
Length: [about 300 words]
A good AI prompt optimizer fills the gaps a model would otherwise guess at. The Prompt Optimizer works on four of them.
Turns a vague request into clear, imperative instructions in a logical order, so the model knows what to do first and what to deliver.
Expands minimal prompts just enough to be actionable, and the Audience and Sources chips prompt you for the background only you can supply.
Makes scope and limits explicit. Chips for Length and Tone let you pin down how long and in what voice the answer should be.
Spells out the shape of the answer: sections, bullet points, a table or a step list, so you get something you can use without reformatting.
OpenAI and Anthropic both offer prompt optimizers for developers. Here is where each one fits.
| Tool | Where it runs | Built for | Models |
|---|---|---|---|
| MultipleChat Prompt Optimizer | The chat message box | Everyday prompts before you send them | ChatGPT, Claude, Gemini, Grok, Perplexity |
| OpenAI prompt optimizer | OpenAI Playground (API account) | Developers refining and migrating API prompts | OpenAI models |
| Anthropic prompt improver | Anthropic's developer Console | Developers improving prompt templates | Claude |
| Prompt templates | Copy and paste | Repeating a known task | Any, but they don't adapt to your input |
Third-party tools as described by OpenAI and Anthropic, checked October 2026.
The optimizer handles structure. These habits add what only you know.
"For a client email" or "for a slide" changes length, tone and format more than any other detail.
Beginners, executives and engineers need different words and different depth.
Paste the draft, data or notes instead of describing them. Models work best on real input.
A table, five bullets, or a 200-word summary. Be specific about length.
One short sample of the style or structure you want beats a paragraph of adjectives.
If the first answer misses, say what is wrong ("too formal", "skip the intro") instead of starting over.
The optimized prompt goes back into the normal message box, so it works with everything else in MultipleChat.
Send one optimized prompt to ChatGPT, Claude, Gemini and Grok and read the answers side by side.
Use clearer instructions on documents, spreadsheets and PDFs in Projects.
The Images chip adds a line for visual details before you generate.
A prompt optimizer (also called a prompt enhancer or prompt improver) rewrites a rough request into a clearer instruction for an AI model: it states the goal, orders the steps and spells out the output format, so the model has less to guess. MultipleChat's Prompt Optimizer does this inside the chat box, before you send the message.
Type your prompt in the message input and click Optimize. A window opens with the rewritten prompt in an editable text box and enrichment chips such as Audience, Tone, Length, Structure, Images and Sources underneath. Click a chip to add a line you can fill in, edit anything you like, then click Use to replace your message or Use & Send to send it straight away.
Yes. The optimized prompt goes back into the normal MultipleChat message box, so you can send it to ChatGPT, Claude, Gemini, Grok or Perplexity, or to several models at once in Compare mode.
No. The optimizer is built to keep your intent and not invent new facts. URLs, numbers, filenames and code blocks are preserved exactly as written, and the rewrite stays in the same language as your input.
The Prompt Optimizer is part of the Pro plan ($20/month) and the plans above it. The subscription page lists what each plan includes.
OpenAI's Playground and Anthropic's Console both have prompt optimizers aimed at developers who are refining API and system prompts for their own models. MultipleChat's Prompt Optimizer is built for everyday chat: it works on the message you are about to send, and the result can go to any model in the workspace.
It helps, but it isn't required. The optimizer handles structure and format; you add what only you know, such as who the answer is for and what you will do with it. The tips on this page cover the habits that make the biggest difference.
More detail in the documentation and plan details on the subscription page.
Type your prompt, click Optimize, and send a clearer request to the model of your choice.
