Deepseek V3.1 Codex: Deepseek with Codex VS Code Extension IS AWESOME!

Key Concepts:

• Codeex: OpenAI's CLI agent, now upgraded and integrated with ChatGPT.
• GPT-5: Advanced language model from OpenAI, integrated with Codeex.
• VS Code Extension: Codeex extension for Visual Studio Code, enabling in-editor AI assistance.
• Agent Mode: Codeex mode that automatically approves edits.
• DeepSeek: An alternative AI model that can be integrated with Codeex.
• Ninja Chat: An all-in-one AI platform offering access to multiple AI models.

1. Codeex Upgrade and Terminal Improvements

• OpenAI has significantly upgraded Codeex, their CLI agent.
• Codeex has been ported to Rust, resulting in improved speed and performance in the terminal.
• It now integrates with ChatGPT subscriptions, providing an alternative to Claude for code generation.
• The limits on token usage and requests are currently dynamic and depend on overall usage, with a $200 plan offering mostly unlimited access.
• Users can select between different GPT-5 models (high, medium, low) using the /models option. GPT-5 medium is the default.

2. Codeex VS Code Extension

• The new VS Code extension makes Codeex similar to other AI coding assistants like Klein or Rue.
• The extension is available as "Codeex by OpenAI" in the VS Code marketplace.
• It includes features like MCPs (likely referring to Model Configuration Profiles) and can be used with other API providers and models.
• The extension features a prompt box at the bottom with options to add manual context and include open files as context.
• Users can choose to run tasks locally or delegate them to the cloud using the "run in cloud" option, which automatically detects the GitHub repo.

3. Codeex Modes: Chat, Agent, and Agent Full Access

• Codeex offers three modes: Chat, Agent, and Agent Full Access.
• The "Chat" mode requires approval for each edit, while "Agent" mode auto-approves all edits.
• "Agent Full Access" auto-approves edits and allows access to files outside the workspace.
• The speaker suggests that the mode options are misleading and could be simplified into a single "Chat" option with toggles for auto-approve and full access.
• Users can set the reasoning effort to high, low, medium, or minimal.
• The extension includes features like recent chats, new task creation, task history, and settings.

4. Codeex Settings and Configuration

• The settings include an MCP option for configuration.
• Advanced settings allow users to change the path of Codeex, the config file, and the base URL.
• The speaker notes a similarity between the Codeex extension and Gemini Code Assist, particularly in the agent mode's use of the Gemini CLI.

5. Practical Example and Performance

• The speaker demonstrates using Codeex to add a label of the model name beside each point in a price-to-performance chart.
• The UI displays simple bullet points and shows the files being edited, similar to Gemini Code Assist.
• The speaker finds the performance on par with Claude for first-generation code generation.
• GPT-5 and Codeex work well together, with optimized tool calls and system prompts.
• The speaker considers the $20 ChatGPT plan with Codeex to be an excellent value, citing the inclusion of ChatGPT, deep research capabilities, cloud-based Codeex, agent mode, and improved limits compared to Cursor.
• The extension is described as snappy, although it may have fewer features than Rue.

6. Integrating Codeex with Other Models (e.g., DeepSeek)

• Codeex can be used with other models like DeepSeek by modifying the Codeex config file.
• Users need to set up the API provider and model in the config file, changing the requesty parts to match the desired provider (e.g., OpenRouter).
• The API key must be set as an environment variable, which can be done by launching VS Code from the terminal after setting the key.
• The chatGPTModel config element in the settings JSON file needs to be updated with the model name.
• DeepSeek works well with Codeex, with a low memory footprint (around 1 GB compared to 3 GB with R code).

7. Ninja Chat Advertisement

• Ninja Chat is an all-in-one AI platform offering access to models like GPT-4o, Claude 3 Sonnet, and Gemini 1.5 Pro for $11 per month.
• Features include an AI playground for comparing model responses and a mind map generator.
• The basic plan includes 1,000 messages, 30 images, and 5 videos monthly.
• The speaker provides discount codes: king25 for 25% off any plan and king40yearly for 40% off annual subscriptions.

8. Conclusion

• The speaker recommends trying Codeex, particularly with the ChatGPT Plus subscription.
• The integration with DeepSeek is highlighted as a positive experience.
• The speaker encourages viewers to share their thoughts and subscribe to the channel.