Cognitive Services pricing - Face API

Use intelligence APIs to enable vision, speech, language, and knowledge capabilities

The Microsoft Face API uses state-of-the-art cloud-based face algorithms to detect and recognize human faces in images. Capabilities include features like face detection, face verification, and face grouping to organize faces into groups based on their visual similarity.

Pricing details

Tier Features Price
Face API – free Up to 20 transactions per minute 30,000 transactions free per month
Face API – standard Up to 10 transactions per second
0–1,000,000 transactions $- per 1,000 transactions
1,000,001–5,000,000 transactions $- per 1,000 transactions
5,000,001–20,000,000 transactions $- per 1,000 transactions
Face Storage Stores images sized up to 4 MB each $- per 1,000 images per month

Support & SLA

  • Free billing and subscription management support are included.
  • We guarantee that Cognitive Services running in the standard tier will be available at least 99.9% of the time. No SLA is provided for the free tier. Read the SLA.

FAQ

Face API

  • Face Storage allows a subscription to store additional persisted faces when using person objects and face lists for identification, or for similarity matching with the Face API.

  • The stored images are charged at $- per 1,000 faces, and this rate is prorated daily.

    For example, if your account used 10,000 persisted faces each day for the first half of the month and none the second half, you would be billed only for the 10,000 faces for the days stored. The calculation then is ($-/1,000) * (10,000*15+0*16)/31 = $-

    As a second example, if each day during the month you persist 1,000 faces for a few hours and then delete them each night, you would still be billed for 1,000 persisted faces each day.

  • The quota for the number of stored person groups is now 1,000, with up to 1,000 persons per person group or face lists.

General

  • The Emotion API, Face API, Language Understanding Intelligent Service API, Bing Speech-to-Text API, and Bing Text-to-Speech API are billed per 1,000 API transaction calls when a production API call is being actively executed. Billing is prorated for production API transaction call quantities.

    The Bing Long Form Speech API service is billed per hour of speech that is analyzed. The billing is prorated on a per-minute basis.

    The Recommendations API and Text Analytics API can be purchased in units of the standard tiers at a fixed price. Each unit of a tier comes with included quantities of API transactions. If the user exceeds the included quantities, overages are charged at the rate specified in the pricing table above. These overages are prorated, and the service is billed on a monthly basis. The included quantities in a tier are reset each month.

  • Usage is throttled if the transaction limit is reached on the free tier. Customers cannot accrue overages on the free tier.

  • Any annotation to a document counts as a transaction. Batch scoring calls will also take into consideration the number of documents that need to be scored in that transaction. So for instance, if 1,000 documents are sent for sentiment analysis in a single API call, that will count for 1,000 transactions. If an API supports more than one annotation operation, that will also be considered. Let’s say an API call performs both sentiment analysis and key-phrase extraction on 1,000 documents, that will count for 2,000 transactions (2 annotations * 1,000 documents).

  • If the usage on a standard tier is exceeded, the account starts to accrue overages. These overages are billed on a monthly basis, and are calculated at the rate specified for each tier.

  • Any API call (with the exception of batch scoring calls) counts as a transaction. Batch scoring calls will count based on the number of items that need to be scored in that transaction.

  • Usage is throttled if the transaction limit is reached on the free tier. Customers cannot accrue overages on the free tier. Batch scoring is not supported on the free tier.

  • The Recommendations API can be purchased in units of the standard tiers at a fixed price. Each unit of a tier comes with included quantities of API transactions. If the user exceeds the included quantities, overages are charged at the rate specified in the pricing table above. These overages are prorated, and the service is billed on a monthly basis. The included quantities in a tier are reset each month.

  • You may upgrade to a higher tier at any time. Billing rate and included quantities corresponding to the higher tier will begin immediately.

  • Below table provides a list of available end-points for each API. The response for the same end-point of Bing Web Search API may vary depending on the Tier purchased. Refer to the next question for details.

    Included APIs Endpoints Available in Tiers
    Bing Web Search API https://api.cognitive.microsoft.com/bing/v7.0/search S1-S8
    Bing Image Search API https://api.cognitive.microsoft.com/bing/v7.0/images/search S1, S3, S7, S8
    Bing News Search API https://api.cognitive.microsoft.com/bing/v7.0/news/search S1, S5, S8
    Bing Video Search API https://api.cognitive.microsoft.com/bing/v7.0/videos/search S1, S4, S7, S8
    (Preview, EN-US Only)
    https://api.cognitive.microsoft.com/bing/v7.0/entities S1, S6
    Bing Autosuggest API https://api.cognitive.microsoft.com/bing/v7.0/Suggestions S1, S2
    Bing Spell Check API https://api.cognitive.microsoft.com/bing/v7.0/spellcheck S1, S2
  • No, the Bing Web Search API is curtailed to meet specific offering of each Tier. For example, Tier S3 is meant for customers wanting to utilize only web search results and images in their applications. The customers also have an option of calling just a specific end point within a tier and their transactions will count against the overall bundle transactions (for example in Tier S3 a customer can just call Image API end point and make 400 transactions and can call Web Search API end point for 600 transactions and the total will be counted as 1,000 transactions).

  • No, both the APIs could potentially return different results even if you are only looking for images. For example, for a certain type of query, Bing Web Search API may return a combination of web results, videos, news but may not return images. However, for the same query, Bing Image Search API may return images.

  • Tiers are priced based on the number of transactions. As an example, for Tier S3, price per 1,000 transactions is $4. At the end of billing period if 12,000 transactions are logged for the Bing Web Search API and 1,000 transactions are logged for the Bing Image Search API, then you will have billed for $52 calculated as $4*(13,000/1,000).

  • Bing Spell Check and Bing Autosuggest APIs are billed at 25,000 transactions increment in Tier S1. Whereas, other APIs are billed at 1,000 transactions increment in Tier S1.

    For example, if you are subscribed to Tier S1 and at the end of the billing period 15,000 transactions are logged for the Bing Web Search API, 3,000 transactions logged for Bing Video Search API, and 25,000 for Bing Autosuggest API. In this case, the approximate bill would be $133 calculated by $7*((15,000+3,000)/1,000) + $7*(25,000/25,000).

    Note: For billing, only the end-point is considered and not the requested response. For example, calling the Bing Web Search API only for image response will be counted towards the Bing Web Search API and not towards the Bing Image Search API.

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