Pronunciation Assessment API

Pricing model: Pay-as-you-go (usage-based). Pronunciation Assessment is billed as part of Azure Speech "Speech to Text" usage; charges are usage-based (billed per second / per audio hour).

Free tier / free usage: Speech to Text free tier (F0): 5 audio hours free per month (shared between Standard and Custom speech-to-text). Azure also offers a general new-customer trial (Get free cloud services and a $200 credit for 30 days).

Example costs / notes (official site): The Azure Speech pricing page shows that Pronunciation Assessment is charged as standard Speech to Text and that some assessment scores (prosody, grammar, topic, vocabulary) are add-on charges above the baseline Speech to Text price. The public pricing page displays usage categories and commitment-tier structures (e.g., commitment pricing for 2,000 / 10,000 / 50,000 hours), but numeric per-hour rates are rendered dynamically on the Azure pricing page and were not shown in the static page content returned. The official docs instruct that usage is billed in second increments and that the baseline price for Pronunciation Assessment equals the Speech to Text price; add-on scores may incur extra charges.

Discount / commitment options (official site): Commitment tiers (monthly pre-purchase of hours) are available for Speech to Text (e.g., 2,000 / 10,000 / 50,000 hours commitment tiers) and overage rates apply; contact sales for quotes.

Official references: See Azure Speech pricing page (Speech services pricing, Free tier info, Commitment tiers) and the Pronunciation Assessment docs (which state "charged as standard Speech to Text" and which list which scores are included vs. add-ons).