LLM Platform
ChatGPT
Also known as: GPT-4o, GPT-5, GPT-5.5, OpenAI ChatGPT
OpenAI's consumer assistant, the largest LLM surface by user count. Citation patterns shift materially with major model releases (e.g. GPT-5.5 in May 2026), and persistent memory now carries brand affinity across sessions.
What it is
OpenAI's consumer assistant and the largest LLM surface by user count, spanning free, Plus, and enterprise tiers. Citation and retrieval behaviour shifts with each major model release, and persistent memory now carries brand affinity across a user's sessions.
Why it matters
Its sheer reach makes it the single highest-volume discovery surface, and because memory persists, an early positive association with your brand compounds over time rather than resetting each query.
How it works
You earn visibility by being well represented in the web sources its browsing and retrieval layers favour, by clear factual framing that survives synthesis, and by appearing consistently enough that memory and reasoning treat your brand as a default answer.
When it applies
Prioritise it whenever broad consumer reach matters and as the baseline surface for any AI search programme given its user volume.
Examples
- A user asks ChatGPT to recommend project management tools and your product is named alongside the incumbents.
- A returning user who once discussed your brand gets it surfaced again in a later, loosely related session via memory.
- ChatGPT browses the live web for a comparison query and cites your published guide as a source.
How it is measured
- Share of voice: frequency your brand appears across a representative set of category prompts.
- Citation rate when browsing is active and the linked source domains.
- Sentiment and framing of how your brand is described in answers.
- Consistency of inclusion across repeated and reworded prompts.
Related terms in LLM Platform
- ClaudeAnthropic's assistant. Strong on long-context analysis, tool use, and structured citation. Increasingly cited inside enterprise workflows where source attribution and reasoning quality matter.
- CopilotMicrosoft's assistant, integrated across Bing, Windows, Office, and Edge. Pulls from the open web with Bing's index; visibility in Copilot is correlated with Bing ranking signals more tightly than other LLMs.
- GeminiGoogle's flagship assistant, integrated across Workspace, Android, and Search (AI Overviews and AI Mode use Gemini-family models). Brands optimising for Gemini reach are simultaneously optimising for AI Overviews.
- GrokxAI's assistant, surfaced primarily inside X (formerly Twitter) and via the standalone Grok app. Distinctive for real-time access to the X firehose, which makes it the fastest LLM surface for current-events and live-trend queries, a different discovery shape from retrieval-grounded competitors.
- Meta AIMeta's assistant, powered by Llama models and surfaced inside WhatsApp, Instagram, Messenger, and Facebook. Discovery channel reach grows with each new Llama release.
- PerplexityAn answer engine that combines retrieval with LLM synthesis and shows inline citations by default. Higher attribution rate than most platforms, citations are part of the product, not an afterthought.