OpenAI [1] as well as Azure OpenAI, Anthropic [2], as well as Parasail [3] for all the "open source" models. There are others that I was thinking of, but those are the first I could find without my notes. Typically the batch API is 50% cheaper than live inference
1: https://platform.openai.com/docs/guides/batch
2: https://docs.anthropic.com/en/docs/build-with-claude/batch-p...
3: https://docs.parasail.io/parasail-docs/batch/batch-quickstar...