Quotas

Service quotas, also referred to as limits, are the maximum number of service resources allowed for your AWS account. For more information, see AWS service quotas in the AWS general reference.

Some service quotas can be adjusted or increased. Refer to the Adjustable column in the following tables to see whether a quota can be adjusted and to the Self-service column to see whether you can request a quota adjustment through the Service quotas console. Contact AWS Support to increase a quota that is adjustable, but not through self-service. It can take a few days to increase a service quota. If you're increasing your quota as part of a larger project, be sure to add this time to your plan.

Note

Character limits are calculated as the number of Unicode code units. In most cases, one Unicode character is equivalent to one Unicode code unit. Some special characters might be greater than one unit and counts might differ for different encodings. For more information on calculating string length, see this documentation.

Build-time quotas

The following maximum quotas are enforced when you are creating a bot.

Description	Default	Adjustable	Self-service
Bots per AWS account	100	Yes	Yes
Bot channel associations per AWS account	5,000	No	N/A
Bots per bot network	5	No	N/A
Bot networks per bot	25	No	N/A
Versions per bot	100	No	N/A
Intents per locale in each bot	1,000 in en-AU, en-GB, and en-US 250 in all other locales	Yes	No
Slots per locale in each bot	4,000 in en-AU, en-GB, and en-US 2,000 in all other locales	No	N/A
Custom slot types per bot locale	250 in en-AU, en-GB, and en-US 100 in all other locales	No	N/A
Custom slot type values and synonyms per locale in each bot	50,000	No	N/A
Total characters in sample utterances per locale in each bot	2,000,000 in en-AU, en-GB, and en-US 200,000 in all other locales	No	N/A
Channel associations per bot alias	10	No	N/A
Slots per intent	100	No	N/A
Sample utterances per intent	1,500	Yes	Yes
Characters per sample utterance	500	No	N/A
Text response length	4,000	No	N/A
Sample utterances per slot	10	Yes	Yes
Characters per sample slot utterance	500	No	N/A
Prompts per slot	30	No	N/A
Values and synonyms per custom slot type	10,000	No	N/A
Characters per custom slot type value	500	No	N/A
Characters in a channel association name	100	No	N/A
Number of concurrent Automated Chatbot Designer analysis jobs across all bots in your account per Region	10	No	N/A
Size of custom grammar slot type XML file	100 KB	No	N/A

Runtime quotas

The following maximum quotas are enforced at runtime.

Description	Default	Adjustable	Self-service
Input text size for RecognizeText and RecognizeUtterance	1024 characters	No	N/A
Speech input length for RecognizeUtterance operation	15 seconds	Yes	No
Size of RecognizeUtterance headers	16 KB	No	N/A
Size of combined request and session headers for RecognizeUtterance	12 KB	No	N/A
Maximum number of concurrent text-mode conversations for RecognizeText, RecognizeUtterance, or StartConversation for the TestBotAlias	2	No	N/A
Maximum number of concurrent text-mode conversations for RecognizeText, RecognizeUtterance, or StartConversation for other aliases	50	Yes	No
Maximum number of concurrent voice-mode conversations for RecognizeUtterance for the TestBotAlias	2	No	N/A
Maximum number of concurrent voice-mode conversations for RecognizeUtterance for other aliases	125	Yes	No
Maximum number of concurrent voice-mode conversations for StartConversation for the TestBotAlias	2	No	N/A
Maximum number of concurrent voice-mode conversations for StartConversation for other aliases	200	Yes	No
Maximum number of concurrent session management operations (PutSession, GetSession, or DeleteSession) when using the TestBotAlias	2	No	N/A
Maximum number of concurrent session management operations (PutSession, GetSession, or DeleteSession) when using other aliases	50	Yes	No
Maximum input size to a Lambda function	12 KB	No	N/A
Maximum output size of a Lambda function	50 KB	No	N/A
Maximum size of session attributes in Lambda function output (after base-64 encoding)	12 KB	No	N/A
Maximum timeout of a Lambda function	30 seconds	Yes	No