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Additional Notes on Responses API and Agents SDK
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 the highlights and things to know for those already familiar with the OpenAI platform. 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 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 Web search Available as a tool in Responses (gpt-4o / gpt-4o-mini only) Available as a model only in Chat Completions Pricing here 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, 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!
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 the highlights and things to know for those already familiar with the OpenAI platform.
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
- 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
-
Web search
- Available as a tool in Responses (gpt-4o / gpt-4o-mini only)
- Available as a model only in Chat Completions
- Pricing here
-
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, 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!
