Anthropic SDK vs OpenAI Assistants API
Anthropic SDK for maximum control; Assistants API for managed state without infrastructure.
Anthropic SDK / Managed Agents
Building blocks for custom agents — tool use, prompt caching, batch API, extended thinking, memory.
Use this when
Custom loops, prompt caching, batch API, fine-grained control.
Full profile →OpenAI Assistants API
OpenAI's hosted agent runtime. Threads, tools, file search, code interpreter — managed for you.
Use this when
Managed threads, built-in file search, code interpreter sandbox.
Full profile →Cost comparison
Both per-token. Assistants API adds storage costs.