We've raised the max request size for Messages and Token Counting on the Claude API from 32 MB to 128 MB.
Image-heavy requests like long computer-use sessions and big PDFs were previously hitting 32 MB with plenty of context window left. Now you get ~4x more room.
Long computer-use sessions and large PDFs no longer hit the 32 MB request cap before the context windowThe maximum amount of text a model can consider at once — its working memory for the current conversation or task.Full definition → fills. The 128 MB limit applies only to the first-party API, so cloud-platform users still face 20 to 32 MB.
Terms in this piece · Glossary
token — The chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.
context window — The maximum amount of text a model can consider at once — its working memory for the current conversation or task.
