OpenAI Codex training
Codex alongside your IDE and in CI
Codex is OpenAI's agentic coding offering: a cloud environment where tasks run in parallel plus a CLI that lives in your terminal. This training shows you how to position both alongside Claude Code and Cursor, and when Codex is the right choice.
What you learn
- Codex cloud and Codex CLI compared, with clear selection criteria
- Delegating tasks to parallel Codex agents
- AGENTS.md and project instructions that make output steerable
- Branch and PR strategy for agent work in shared repos
- Eval pipelines and regression tests around agent output
- Multi-model patterns: Codex alongside Claude Code and Gemini
- Cost control and monitoring per organisation
Who it's for
- 01Developers and tech leads in OpenAI-oriented stacks
- 02Teams introducing parallel agent workflows
- 03Engineering managers weighing Codex against Claude Code
Programme
- 09:30
Codex landscape
Cloud versus CLI, ChatGPT integration, pricing and competitors.
- 10:30
AGENTS.md
Project instructions, conventions and sub-agent patterns for Codex.
- 13:00
Parallel work
Multiple agents at once, branch strategy and review gates.
- 14:30
Evals and cost
Regression tests, budget monitoring and multi-model routing.
- 16:00
CI integration
Codex in GitHub Actions and delivery pipelines.
What you take away
What you take away
- An AGENTS.md and review flow that works on your own repo
- A clear choice between Codex, Claude Code or both
- Cost dashboard and budget policy
Prerequisites
- ChatGPT Business or API access with Codex quota
- Git, a terminal and your own repository
Frequently asked questions
How does Codex compare to Claude Code?+
Codex shines at parallel cloud tasks and ChatGPT integration. Claude Code is stronger in local shell workflows. The training walks through the tradeoffs in detail.
What does the training cost?+
Pricing on request. We'll send a tailored quote that includes course materials, recordings and 30 days of async support afterwards. For in-company sessions you pay one flat fee, regardless of headcount up to 12 people.
Where does the training take place?+
By default at our office in Utrecht or in-company at your own location. Fully remote is fine too; we then split the day into two half-day blocks.
Do I receive a certificate?+
Yes. Afterwards you receive a certificate of attendance listing the covered topics and hours, usable for CPD points and internal records.
Schedule this training
Send a short message or book a call. We confirm a date within one business day and send a tailored programme.