Cuey

Cuey is a free Chrome extension that runs your prompt through 30+ other AI models and shows agreements and disagreements in a sidebar, so you can catch a wrong answer from ChatGPT, Claude, Gemini, Grok or DeepSeek.

Cuey is a Chrome extension built by Llama Valley Inc that works as a second-opinion layer for AI chat tools. Instead of trusting one model's answer, a user sends the same prompt to several other models and reads the results in a sidebar next to the conversation. The sidebar highlights where the models agree, where they disagree and what the original model left out, which makes it easier to spot a confident but wrong response before acting on it. The extension is aimed at people who already use ChatGPT, Claude, Gemini, Grok or DeepSeek for everyday work and want a quick sanity check without opening extra tabs or copying text between apps. It runs inside the AI tool the user already has open, so there is no separate application to learn. The listing says no API keys are needed and nothing has to be configured, and a person with a ChatGPT Plus plan can use it alongside that plan to get opinions from other models without buying more subscriptions. In practice the flow is short: install the extension from the Chrome Web Store, open a preferred AI tool, type a prompt, and let Cuey run it across the selected models. Opening the Cuey sidebar icon shows the comparison. Cross-checking against 30+ models is free up to a daily limit, and the extension supports eight interface languages. A memory feature lets users import chat history and memories from ChatGPT, Claude and Gemini so context can follow them when they switch models. Among alternatives, Cuey sits between multi-model chat apps, which replace the user's AI tool with their own interface, and hallucination checkers that audit a single answer. Its distinguishing choice is to stay inside the existing tool and focus on agreement and disagreement between models. The extension page lists a 4.8 rating from 12 reviews and about 2,000 users, so it is a young product, and the publisher states that it does not sell user data while reading page content to provide the comparison and context features.