GitHub Copilot
GitHub / Microsoft
Code completion and chat in your editor — now with an agent mode too.
AgentCoding
Codex
OpenAI’s coding agent that works on tasks in parallel in the cloud or locally.
- Tier
- Agents You delegate a goal.
- Autonomy
- L4 Autonomous agent — Reviews the finished result
- Maker
- OpenAI
- Origin
- United States
- Slovenian
- —
- Open weights / source
- No
- Pricing
- Paid
- Best for
- Teams on ChatGPT delegating coding tasks
+ Pros
- Runs many tasks in parallel in the cloud
- Returns ready pull requests
- Included in ChatGPT plans
− Cons
- Tied to the OpenAI ecosystem
- Output still needs code review
Frequently asked questions
Is Codex free?
No — it requires a paid plan.
Who makes Codex?
Codex is made by OpenAI (United States).
What is Codex best for?
Teams on ChatGPT delegating coding tasks.
What are the alternatives to Codex?
Similar tools on the radar: GitHub Copilot, Claude Code, Cursor.
Similar on the radar
Claude Code
Anthropic
Agentic coding in the terminal and IDE: reads your codebase, edits files, runs commands.
Cursor
Anysphere
AI-first code editor whose agent plans and applies multi-file changes.