[szhaomsft]

Summary

• Add Azure Realtime with the documented Voice Live Pro tier and Azure Realtime Fast with an explicitly labeled, user-specified Lite-tier pricing reference.
• Include both models in managed native speech-to-speech selection, per-minute comparisons, prompt sensitivity, editable rates, and CSV export using existing Central India tier meters.
• Prevent unverified BYOM or alternative-pipeline scenarios from substituting GPT prices. Do not add separate STT, Azure HD, or GPT Live session charges to native-audio estimates.
• Document the pricing basis and retain editable audio-tokenization assumptions without claiming verified Azure Realtime token rates or regional availability.

Validation

• node --test tools\cost_calculator\calculator.test.mjs — 26 tests passed, including exact Pro/Lite rates, native call totals, cache handling, scenario eligibility, and existing-model regressions.
• node --check tools\cost_calculator\app.mjs
• git diff --check
• Browser checks covered model selection, totals, Fast assumption labels, comparison rows, CSV pricing basis, rate overrides/reset, hosting fallback, pipeline filtering, and unchanged GPT Live behavior.

No price-snapshot refresh or deployment changes are included.