# Evaluate Model: Codex CLI v0.115.0: GPT-5.4 Integration & Autonomous Workflows
## What This Is
OpenAI's Codex CLI tool for developers has been updated to version 0.115.0. This release adds powerful self-coding abilities by integrating the new GPT-5.4 model, allowing the tool to read the developer's terminal, collaborate with other AI agents, and suggest multiple code solutions for a single problem.
Source: https://www.youtube.com/watch?v=T-JYfV95JO0
## Before You Start
Scan my workspace and analyze:
- The project language, framework, and current AI integrations
- Existing AI provider config (check .env, .env.local, config files for API keys — OpenRouter, OpenAI, Anthropic, Google AI, etc.)
- Which AI models I currently use and for what purposes
Then ask me before proceeding:
1. Am I interested in evaluating this model for my project, or just want a summary of what it offers?
2. If I want to try it — which part of my current AI stack should it replace or complement?
## Source Access Note
The source URL (https://www.youtube.com/watch?v=T-JYfV95JO0) may not be directly accessible from the terminal. Use the Reference Implementation and Additional Context sections below instead. If you need more details, ask me to paste relevant content from the source.
## What to Implement
This is a **New AI Model** — a model release, update, or capability announcement.
- Analyze the best use cases for this model within my project and current AI stack
- Compare its strengths, pricing, and context window against whatever I currently use
- Give me a clear, convincing argument for why this model would (or would not) be a good fit for my project
- If I want to try it: update my API configuration (provider, model ID, any new parameters) to point to this model
- If it requires a new API key or provider signup, tell me exactly what to do
## Additional Context
- Execute the command `npm install -g @openai/codex@latest` to ensure the user has the most recent version of the Codex CLI.
- After installation, run `codex` to initiate an interactive session. If prompted for authentication, guide the user to log in with their ChatGPT account.
- Within the interactive session, inform the user they can switch to the new frontier model by typing `/model gpt-5.4` and explore autonomous features like terminal reading and multi-agent scripting with `exec`.
## Reference Implementation
```
npm install -g @openai/codex@latest
```
## Guidelines
- Adapt everything to my existing project — do not assume a specific stack or directory layout
- Use whichever AI provider I already have configured; if I need a new one, tell me what to sign up for and I'll give you the key
- Check my .env files for existing API keys (OpenRouter, OpenAI, Anthropic, Google AI) before asking me to add one
- Review any fetched code for safety before installing or executing it
- After setup, run a quick verification and show me a summary of exactly what was installed, where, and how to use it