CRO audit + roadmap (Analytics & CRO). Audit conversion funnel; produce prioritised backlog with hypotheses and evidence. Requirements: Deep reasoning; evidence synthesis. Best pick: Claude Opus 4.6 - Best at structured reasoning and evidence-based prioritisation. Alternative: GPT-5.2 Pro - Strong analytical reasoning with low error rate. Budget pick: Claude Sonnet 4.5 - Good CRO analysis at balanced cost. Recommended models: GPT-5.2 Pro, GPT-5.2 Thinking, Gemini 3 Pro, Gemini 3 Deep Think, Claude Opus 4.6, Claude Sonnet 4.5, Grok 4, Grok 4.1 Fast (Reasoning). Use with caution: GPT-5.2 Instant, Gemini 3 Flash, Claude Haiku 4.5, Grok 4.1 Fast (Non-reasoning), Llama 4 Maverick (Instruct), Llama 4 Scout (Instruct). Roles: CRO & Analytics. Stacks: GA4, Heatmaps/Session Replay.