Everything you need to know about BAX, how it works, what it measures, and how to use it to improve your brand's AI visibility.
BAX (AI Brand Attention Index) is a Chrome extension that measures how AI platforms mention, position, and recommend your brand inside their answers. It audits 13 LLM platforms — including ChatGPT, Perplexity, Gemini, Claude, Copilot, Mistral, Grok, DeepSeek and others — and produces a single scored report showing your AI brand visibility.
BAX answers the question: when someone asks an AI about your category, does your brand appear — and how well does it appear?
The BAX Score is a 0–100 composite index measuring the quality of attention your brand receives inside AI responses. It combines 7 dimensions: Visibility, Position, Sentiment, Recommendation type, Citation rate, Context, and Consistency.
Score tiers: A (80–100), B (65–79), C (50–64), D (35–49), F (0–34). A single number your board will understand and your content team will know how to move.
BAX is an AI brand monitoring and generative engine optimization (GEO) tool — not an SEO tool. SEO tools measure visibility in traditional search engine results pages. BAX measures brand visibility, attention quality, and recommendation rate inside LLM-generated answers across 13 AI platforms.
Unlike presence-only AI brand trackers, BAX measures attention quality through its Attention Model — combining position weight, Reader Type distribution, and Response Consumption Signals into a single BAX Score.
SEO tools measure your visibility in search engine results pages. BAX measures your visibility and attention quality inside AI-generated responses across 13 LLM platforms. A brand can rank first on Google and score F on BAX. The two signals are complementary but not interchangeable.
Most AI brand tracking tools measure presence: was your brand mentioned or not. BAX measures attention: where in the response your brand appeared, what type of reader reached it, whether it was actively recommended, and what narrative the AI used to describe it.
BAX combines Position Distribution, Attention Audience Segmentation, Response Consumption Signals, and Recommendation Metrics into a single scored report.
You install the BAX Chrome extension and enter a URL. BAX automatically detects your brand name and industry, then sends 39 structured queries across 13 LLM platforms. Claude AI analyzes all responses and scores the brand. Results appear in a dashboard with BAX Score, AI Share of Voice, sentiment analysis, competitor comparison, and recommendations. One audit takes approximately 5 minutes.
BAX audits 13 platforms in a single run: ChatGPT, Gemini Advanced, Perplexity, Google AI, Anthropic Claude, Copilot, Grok (xAI), Mistral, Meta AI, DeepSeek, Qwen, You.com, and Poe.
The Attention Model measures cognitive prominence at the moment of brand exposure. It combines position weight (First = 2.0×, Middle = 1.0×, Last = 0.5×), Attention Reach, Response Completion Rate, Reading Quality, Brand Section Dwell Time, and Post-Brand Click Rate.
Formula: Attention Score = First × 2.0 + Middle × 1.0 + Last × 0.5, weighted by Attention Reach and Response Consumption Signals.
AI Share of Voice is the percentage of AI responses in which your brand is mentioned relative to all brands mentioned across the same query set. BAX automatically detects your top competitors and audits them in the same run, producing a per-platform AI Share of Voice breakdown.
BAX runs entirely inside your Chrome browser. No brand data, query results, or audit responses are sent to any BAX server for storage. Audit results are stored in Chrome local storage on your device only and are never transmitted outside your browser session.
Your Anthropic API key, if provided, is stored locally in your browser using Chrome's secure storage API and is never transmitted to BAX servers.
BAX offers credit-based plans. Credits never expire and can be used across any number of audits, URLs, platforms, and competitors. No subscriptions. No monthly charges.
Free (Starter) — Install free, run simulated audits, see basic BAX Score preview across 6 platforms.
Starter (£45) — Full audit, all 13 platforms, PPTX and PDF export.
Growth (£129) — Everything in Starter, plus scheduled audits, audit history, and AI Recommendations Engine.
Scale (£415) — Multi-brand management, priority processing.
Agency (£1,269) — White-label reports, bulk URL management, CSV import.
No. Credits never expire. Buy a credit pack and use it at your pace — across any number of audits, URLs, platforms, and competitors.