What platforms does LettiB support?

LettiB is available on Web App.

LettiB

Name: LettiB
Author: LettiB

Ask one question, get answers from several AI models merged into one.

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Screenshot of LettiB, Ask one question, get answers from several AI models merged into one

What is LettiB?

LettiB is an AI chat bot tool. A multi-model AI workspace that runs one prompt across OpenAI, Claude, Gemini and others, then synthesizes their answers into one attributed response, with projects, memory and a personal voice rewrite tool.

LettiB is a workspace built around a single premise: instead of opening ChatGPT, Claude, Gemini and other assistants in separate tabs, you send one prompt to several models at once and let the tool combine their output. The council listed on the site covers OpenAI, Anthropic, Google, Grok, Perplexity, DeepSeek and Groq, with support for custom OpenAI-compatible endpoints as well. Responses stream in live, so you can watch each model work rather than waiting on a batch job. The core workflow has two stages. Compare mode runs the same prompt across multiple models side by side; free accounts handle two at a time, Pro raises that to four, and Power allows six. Synthesis then takes that comparison run and merges the strongest material into a single answer with source attribution. Two variations extend the idea: Group Synthesis assigns different jobs to different models before merging their work into one deliverable, and Me-Mic rewrites a finished answer in a writing voice saved from a sample, keeping the original intact. Around that sits the organizational layer. Projects group chats, compares and syntheses by topic, Project Memory accumulates goals, decisions, preferences and facts so later prompts start with context, and a Notion connection lets a workspace be used from inside LettiB. Privacy claims are explicit: no training on conversations, keys encrypted in Supabase Vault, and export of anything you create. The obvious comparison is paying for two or three premium subscriptions. LettiB Pro lists at $15 per month against $20 tiers at ChatGPT Plus and Claude Pro, and the merged cross-vendor answer has no direct equivalent in those products. Single-model chat is still available here for anyone who wants it. Users who mainly lean on one vendor, or who need heavy unlimited volume without managing their own provider keys, will find less advantage.

How do you use LettiB?

1Create a free account
Sign up to claim the included monthly credits. The question you typed on the homepage is held and waiting for you once the account exists, so nothing is lost in the handoff.
2Send one prompt to several models
Enter a question and run it in Compare mode. Each selected model answers in parallel and streams live; free accounts compare two models, Pro four, Power six.
3Synthesize the comparison into one answer
Run Synthesis on the finished comparison to merge the strongest points into a single attributed response. Free accounts are capped at ten syntheses a month; paid plans are unlimited.
4Assign different jobs with Group Synthesis
When a task has distinct parts, give each model its own role and merge the outputs into one deliverable rather than a single blended answer.
5Save your writing voice with Me-Mic
Store a writing sample in Settings, then rewrite any LettiB output in that voice. The original answer stays available beside the rewrite.
6Organize work into projects and add your keys
File chats, compares and syntheses under project folders so memory accumulates. If you prefer provider-direct billing, attach your own API keys or pick the lifetime BYOK plan.

Pros and cons

Pros

Synthesis merges outputs from several vendors into one answer with source attribution, which single-model subscriptions do not offer.AI
Pro at $15 per month undercuts the $20 monthly tiers of ChatGPT Plus and Claude Pro while covering multiple vendors.AI
Optional bring-your-own-keys setup gives provider-direct billing and full control, with a $79 one-time lifetime option.AI
Project Memory carries goals, decisions and preferences forward, so new prompts inherit context instead of starting cold.AI
Me-Mic rewrites finished answers in a saved writing voice while preserving the original for comparison.AI

Cons

Credits are the real limit: the free tier's 300 credits equal roughly 25 chat messages or 3 compare runs, and paid plans meter usage the same way.AI
Large context, image handling and document work depend on which models sit behind the managed credits, so results vary by provider and plan level.AI
Model names and pricing are presented as of October 2026 and will drift as vendors ship and retire versions.AI
Support documentation is thin on the site: no help centre, no written guides beyond two feature pages.AI
Voice rewriting is not AI detection and the saved sample governs quality, so unusual or mixed writing styles will transfer poorly.AI

How much does LettiB cost?

Free trial

Pro and Power include a 7-day free trial started from signup. The Free tier is permanent rather than a trial and needs no credit card.

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Pricing

Free at $0 with 300 credits a month (about 25 messages or 3 compares), Pro at $15/mo with 15,000 credits, Power at $35/mo with 35,000, and Lifetime BYOK at $79 one-time. Annual Pro is $144/yr and Power $336/yr. Credit packs of $10, $25 and $49 top up managed credits on any tier.

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Integrations

Providers include OpenAI, Anthropic, Google, xAI, Perplexity, DeepSeek and Groq, plus custom OpenAI-compatible endpoints. A Notion workspace connection is also listed.

Features

Compare one prompt across up to six models, then Synthesis merges them into one attributed answer. Group Synthesis assigns separate jobs to different models, Group Chat threads several models together, and Me-Mic rewrites output in a saved voice. Projects, Project Memory and unlimited history sit on paid tiers.

Learn more

Frequently asked questions about LettiB

How much does LettiB cost?
Free at $0 with 300 credits a month (about 25 messages or 3 compares), Pro at $15/mo with 15,000 credits, Power at $35/mo with 35,000, and Lifetime BYOK at $79 one-time. Annual Pro is $144/yr and Power $336/yr. Credit packs of $10, $25 and $49 top up managed credits on any tier.
Does LettiB offer a free trial?
Pro and Power include a 7-day free trial started from signup. The Free tier is permanent rather than a trial and needs no credit card.
Does LettiB have an API?
Yes, LettiB offers an API.
How do you use LettiB?
The walkthrough on this page covers 6 steps: 1. Create a free account 2. Send one prompt to several models 3. Synthesize the comparison into one answer 4. Assign different jobs with Group Synthesis 5. Save your writing voice with Me-Mic 6. Organize work into projects and add your keys.
What platforms does LettiB support?
LettiB is available on Web App.
What does LettiB integrate with?
Providers include OpenAI, Anthropic, Google, xAI, Perplexity, DeepSeek and Groq, plus custom OpenAI-compatible endpoints. A Notion workspace connection is also listed.