AgentsChatGPT agent, Codex & Agents SDK
The easiest on-ramp if you already pay for ChatGPT. ChatGPT's agent mode does multi-step tasks with a cloud browser. Codex is OpenAI's coding agent, and the Agents SDK is for developers building their own agents.
✓ Last verified October 15, 2026 from official sourcesAgent mode is on paid plans: Plus 40 messages/mo, Pro 400/mo, Business & Enterprise 40/mo (or credits). Codex is included in ChatGPT Free, Go, Plus, Pro, Business and Enterprise, with usage that grows by tier.
Everyday users who already pay for ChatGPT. Delegating web research and form-filling. Coding tasks in the cloud.
Cloud. Business, Enterprise and Edu plans have separate data controls. Skill level: Beginner.
What it's great at
- Web tasks that end in a file or a summary
- Cloud coding tasks through Codex
- Developers building on the Agents SDK
What it can do
- Agent mode runs longer, multi-step tasks that end in finished deliverables
- Codex app for macOS and Windows, with plugins for tools like Slack, GitHub and Figma
- Agents SDK: no separate platform fee, you pay for model tokens and tools. OpenAI is retiring Agent Builder and its Evals product on Nov 30, 2026, and recommends the Agents SDK or Workspace Agents in ChatGPT instead.
Example tasks to try
- "Compare three CRM tools' pricing pages and give me a table."
- "Plan a 2-day team offsite under $3,000 and draft the invite."
- In Codex: "Add input validation to the signup form and open a PR."
Start in 5 minutes
- In ChatGPT (Plus or higher), open the tools menu and choose agent mode
- Describe the outcome and the format you want back
- Watch the first run, and take over the browser whenever it asks you to
Go to OpenAI's official page →
Watch out for
Agent mode has monthly message limits that depend on your plan.
Compare it
- ChatGPT agent vs Claude vs Gemini
- Personal agents compared: ChatGPT agent vs Muse vs Grok Bot vs Manus
- Pick an agent for research and the web
OpenAI's full lineup
- ChatGPT agent, Codex & Agents SDKThe easiest on-ramp if you already pay for ChatGPT.
- OpenAI CodexCODINGOpenAI's coding agent, included with ChatGPT.
Similar agents
Claude, Claude Code & Claude Agent SDK
A strong all-round choice for coding and for building your own agents.
Gemini, Jules & Gemini Enterprise
Best if you work in Google Workspace or GitHub.
Muse
A consumer agent that lives where many people already chat.
Microsoft 365 Copilot
A natural fit if your organization already runs on Microsoft 365.
Official sources
Prices change often. Confirm on the vendor's page before you buy. We're independent, and no vendor pays for placement.