Limits and quotas

There are two tiers of keys for the Custom Vision service. You can sign up for a F0 (free) or S0 (standard) subscription through the Azure portal. See the corresponding Cognitive Services Pricing page for details on pricing and transactions.

The number of training images per project and tags per project are expected to increase over time for S0 projects.

Factor	F0 (free)	S0 (standard)
Projects	2	100
Training images per project	5,000	100,000
Predictions / month	10,000	Unlimited
Tags / project	50	500
Iterations	20	20
Min labeled images per Tag, Classification (50+ recommended)	5	5
Min labeled images per Tag, Object Detection (50+ recommended)	15	15
How long prediction images stored	30 days	30 days
Prediction operations with storage (Transactions Per Second)	2	10
Prediction operations without storage (Transactions Per Second)	2	20
TrainProject (API calls Per Second)	2	10
Other API calls (Transactions Per Second)	10	10
Accepted image types	jpg, png, bmp, gif	jpg, png, bmp, gif
Min image height/width in pixels	256 (see note)	256 (see note)
Max image height/width in pixels	10,240	10,240
Max image size (training image upload)	6 MB	6 MB
Max image size (prediction)	4 MB	4 MB
Max number of regions per image (object detection)	300	300
Max number of tags per image (classification)	100	100

Note

Images smaller than than 256 pixels will be accepted but upscaled. Image aspect ratio should not be larger than 25:1.