Catalog/ № 041
OpenAI Responses API
shipOpenAI's agent-building API — tools, web search and file search built in.
platform.openai.comVerified 2026-08-15
ledger entry · observed by @whysanesanders
The most batteries-included agent API: hosted web search, file search and code interpreter without wiring infra. The Assistants API is deprecated in its favor — build here.
Known limitations
- Hosted-tool pricing (storage, search calls) sneaks up on you.
- Conversation state lives on OpenAI's side.
- Less controllable than explicit-graph frameworks like LangGraph.
- Assistants API sunsets 2026-08-26 — Responses is the default for new projects.
Facts
- pricing
- paid1
- price note
- pay-per-token; e.g. GPT-5 mini $0.25/1M input
- free tier
- no
- open source
- no
- api
- yes
- self-host
- no
- category
- agents
Sources
If we can't show the source, we don't print the number.
Same shelf — agents
CrewAI
agents
Python framework for multi-agent crews — roles, tasks and processes.
OSSAPIFREE TIER
freemiumopen source (MIT); cloud Free Basic (50 exec/mo); Enterprise custom
LangGraph
agents
Graph-based agent orchestration from LangChain — stateful and controllable.
OSSAPIFREE TIER
freemiumframework free open-source; LangSmith Plus $39/seat/mo
Manus
agents
General-purpose autonomous agent that executes multi-step web tasks.
FREE TIER
freemiumfree daily credits; Pro from $20/mo