Recommendation (short):
Use Zapier as the orchestration layer for Typeform -> Salesforce and call the ChatGPT API (or another model) for urgency classification. Start with a hybrid approach: automated classification + rule-based thresholds that escalate to human review for low-confidence cases. This minimizes development while keeping accuracy and auditability.

Why this combo works
- Zapier: fast to configure, native Typeform and Salesforce connectors, built-in retries, and task history for debugging. Good for teams without full-time engineers.
- ChatGPT (model API): flexible natural-language classification for open-ended Typeform answers (higher recall than simple keyword rules). Use it only for classification output; keep routing and record updates in Salesforce via Zapier.

Tradeoffs — reliability, latency, maintenance, cost at scale
- Reliability: Zapier is reliable for typical business volumes and has retry logic. Model classification reliability depends on prompt design and monitoring; include confidence scoring and fallback rules.
- Latency: Zapier + model API usually adds 0.5–3s per call. If you need sub-second routing, move classification to a dedicated serverless endpoint or an on-premise model. Salesforce API latency is separate and depends on your account/limits.
- Maintenance: Zapier reduces maintenance overhead (UI for changes). However, keeping prompts, classification rules, and Salesforce mappings up-to-date still requires periodic review. Models need prompt/version updates as lead language changes.
- Cost at scale: Zapier charges per task; costs multiply with high lead volume. Model API costs scale by tokens and calls. For >10k leads/month, total cost can exceed Zapier plan thresholds—consider a direct webhook -> serverless function + queue to call the model and Salesforce for lower per-call cost.

Decision criteria (pick based on these):
- Volume: >10K — consider serverless + queue to reduce per-call middleware cost.
- Latency: need formatter -> HTTP call to model or internal classifier. 4. Include confidence score and fallback: if confidence 50k leads/mo) or strict sub-second routing or strict data residency/compliance needs.

If you want, I can sketch the exact Zap steps and a sample prompt for urgency classification that includes confidence heuristics.

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