Codex
Excellentby OpenAI · founded 2025 · updated Jul 2026
Codex is OpenAI's coding agent: give it a task and it works in a sandboxed environment or your repo, writing code, running tests and opening pull requests. Available in ChatGPT, a CLI and IDE extensions, it represents OpenAI's push from code completion toward delegated, agentic software engineering.
Coding AssistantsSubscriptionEstablishedFrom Included with ChatGPT Plus / Pro
85.3TIP Score
The score, taken apart
Fixed weights, sources attached, the formula
Capability(30%)89
Value for Money(15%)84
Security & Compliance(15%)80
Integrations & Ecosystem(15%)84
Maturity & Reliability(10%)76
Momentum(15%)92
Best for
- ◆Delegating well-scoped engineering tasks
- ◆ChatGPT-subscribed developers
- ◆Parallel background coding work
Key integrations
GitHubChatGPTCLI & IDE extensionsCloud sandboxes
Strengths
- ＋Delegated tasks: writes code, runs tests, opens PRs
- ＋Backed by OpenAI's strongest coding models
- ＋Parallel task execution in cloud sandboxes
Limitations
- －Younger than incumbent coding assistants
- －Best experience requires ChatGPT paid plans
- －Long autonomous runs still need review
Evidence behind this score
Every TIP Score is backed by verifiable claims. Data is a curated snapshot, always confirm current terms with the vendor.
| Claim | Source | As of |
|---|---|---|
| Codex executes coding tasks in sandboxes and submits pull requests | OpenAI Codex documentation | Jun 2026 |
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