v2.4.0 — 7 AI platforms connected

One tab.
All your AIs.
One memory.

Type @claude, @gemini, or @all inside any AI chat. Every AI responds in a sidebar — right where you are. No tab switching. No repeating yourself. No API key.

@claude@chatgpt@gemini@perplexity@grok@mistral@copilot
CROSSAGENT.SI
→ @claude @gemini @chatgpt
what's the best approach for streaming LLM responses?
Ask @claude, @gemini, @groq…
7
AI platforms
0
API keys needed
< 300ms
routing overhead
100%
native, free path

Why Crossagent

Three things nobody else does.

◈
How it works
@mention routing

One tab. All your AIs.

Type @claude inside ChatGPT — or @grok inside Claude. The target AI answers in a sidebar using your own existing account. No API key. No new subscription. No proxy. Your messages never touch our server.

⬡
Most used feature
@all broadcast

Seven answers. One synthesis.

Type @all and every AI responds simultaneously — ChatGPT, Claude, Gemini, Perplexity, Grok, Mistral, Copilot. Claude reads all seven and synthesizes the final answer. One question. Seven experts. Under 40 seconds.

◯
Biggest differentiator
Engram memory

Your AIs remember you.

Every cross-AI conversation is distilled into facts, preferences, and episodes — stored in Engram, recalled across every session and every platform. Switch from ChatGPT to Claude mid-project and pick up exactly where you left off.

See it in action

One minute. Seven AIs. Zero tab switching.

@mention routing, @all broadcast, and Engram memory — live in a real session.

chat.openai.com
0:17
@claude inside ChatGPT
0:32
@all broadcast
0:51
Engram memory recall

People asked for this

Before Crossagent, people were already looking for it.

On Reddit, HN, LinkedIn, Twitter — asking the same question in different words. Nobody had built the answer yet.

“anyone aware of a service where I could plugin my api keys...and it asks the same question to all 3?”

gtech1Hacker News ↗
That's @all.

“I regularly run ChatGPT and Claude side-by-side. I am souring on Anthropic based on my recent experiences. What is the point of an AI tool if I have to manually click 3-4x to have it complete my task?”

Gergely Orosz (@GergelyOrosz)X / Twitter — The Pragmatic Engineer ↗
That's the problem.

“I was the copy-paste middleman between AI models. I'd ask ChatGPT a question, copy the answer, paste it into Claude for a second opinion, then check with Gemini.”

unioneyDEV Community ↗
That's you, before Crossagent.
7 hrs/week
average time workers spend as “human middleware” between disconnected AI tools — copying, pasting, re-explaining context
Workday Research, May 2026  /  TechRadar ↗

Up in 30 seconds.

No API key. No config. No new account for each AI. You already have the tabs open.

1
Install
Add the Chrome extension. One click, no config.
2
Open your AIs
Have Claude, ChatGPT, Gemini open in tabs as usual.
3
Type @mention
Tag any AI from inside any other AI. That's it.

Your AIs.
Finally talking.

Install. Open Claude and ChatGPT. Type @claude inside ChatGPT. Watch it work.

Add to Chrome — it's free →