Hello! I'm Kaz (@seratch), and I recently joined the Developer Experience team at OpenAI. Previously at Slack, I worked on official SDKs and Developer Relations. At OpenAI, I'll continue to support developers in various ways—looking forward to collaborating with you!
OpenAI announced a new set of APIs and the Agents SDK designed for building agentic applications this week:
I wanted to share a collection of useful links to know more about the new tools.
Responses API
- Combines the simplicity of Chat Completions with the tool support of Assistants (beta)
- Manages conversation state for you
- Supports referencing PDFs, in addition to image files
- Works with all currently available and upcoming built-in tools
- Includes access to the request log dashboard by default
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A full superset of Chat Completions—use Responses for new projects
- Chat Completions will remain supported, including with compatible models
- Assistants (beta) is scheduled to sunset in mid-2026 (migration guides to come)
- Try it in the Playground or with the Next.js sample app
Built-in Tools
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Web search
- Available as a tool in Responses (gpt-4o / gpt-4o-mini only)
- Available as a model only in Chat Completions
- Pricing here
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File search (Vector Store)
- Graduated from Assistants (beta) with new features like metadata filtering
- Upload via Files API and add to a Vector Store
- Pricing here
-
Computer use
- Powered by the Computer-Using Agent (CUA) model (used in Operator)
- Initially available to developers in Tiers 3–5
- Sample apps using Playwright, Docker, Browserbase, and Scrapybara
- For non-browser use cases, human oversight is recommended
- Pricing here
- Planned: Code Interpreter
- You can also use Function Calling alongside built-in tools
Agents SDK
- Built from lessons learned with the experimental Swarm SDK
- Orchestrate everything from simple agents to multi-agent systems
- Supports handoffs, guardrails, and tool execution
- Includes a new tracing UI
- Internally uses Responses API, but you can also integrate external Chat Completions-compatible services
- Available in Python now; Node.js support is planned
Observability Tools
- Track and visualize agent workflows
- Tracing UI available by default when using the Agents SDK
- Request log dashboard available for direct API usage
- Add custom spans in code with tracing APIs
- Supports integration with external tools
As a reminder, the official blog post is a comprehensive reference, so definitely check that out too.
Enjoy trying the latest tools and looking forward to seeing what you build!
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