ChatGPT subscription → OpenAI's top coding models in Kilo
Your existing ChatGPT subscription gives you flat-rate access to powerful OpenAI models. Run OpenAI’s top coding models in IDEs like VS Code and JetBrains. No extra charges beyond your ChatGPT subscription.
Why developers use their ChatGPT subscription with Kilo
Flat-rate pricing lets you use OpenAI's best models inside your IDE
Flat-rate access to OpenAI models
Use your existing subscription for flat-rate access to OpenAI’s strongest models—no pay-as-you-go API costs.
Easy OAuth Setup
No API keys to manage. Click “Sign in to OpenAI Codex” and authenticate in your browser. Tokens are stored securely.
Full agentic coding workflows
Get all of Kilo Code’s agentic capabilities: code generation, debugging, refactoring, file editing, and terminal commands.
Multiple AI Modes
Switch between Code, Architect, Debug, and Ask modes. Each mode is optimized for different development tasks.
Switch providers anytime
OpenAI models are included with your subscription, and you can jump to Claude, Gemini, Grok, or local models whenever you want.
Open Source
Kilo Code is completely free and open source. Audit the code, extend it, contribute. No vendor lock-in.
How to connect your OpenAI subscription access
Set up in under 2 minutes
Open Kilo Code settings
Click the gear icon ⚙️ in the Kilo Code panel to open settings.
Select API provider
In the API Provider dropdown, select “OpenAI – ChatGPT Plus/Pro”.
Sign in and authorize
Click “Sign in to OpenAI Codex,” then finish the browser flow to authorize Kilo Code.
Pick a model
Back in settings, choose a model from the dropdown (e.g., GPT-5.5 or GPT-5.3-Codex). Save your settings and start using AI-powered coding.
Recommended OpenAI models
Model availability depends on your ChatGPT or OpenAI subscription tier.
GPT-5.5
OpenAI's latest frontier model. Strong at long-horizon planning, tool use, and complex multi-file refactors.
GPT-5.3-Codex
Purpose-built coding model with 56.8% on SWE-bench Pro and 77.3% on Terminal-Bench 2.0.
GPT-5-Mini
Fast, lightweight model for quick iterations, edits, and everyday coding tasks.
o3
Deep reasoning model for the hardest planning, debugging, and architecture work.
o4-mini
Efficient everyday reasoning — reliable progress on code tasks without burning through limits.
What you need to know
What's Included
- Access to models in the OpenAI Codex catalog
- Usage counts against your ChatGPT subscription limits
- Secure OAuth authentication stored in VS Code SecretStorage
Limitations
- Codex catalog models only (not every OpenAI API model)
- OAuth tokens cannot be exported with settings
- Requires an active Plus or Pro subscription
- Cannot be used for cloud features such as Cloud Agents and Kilo Deploy
How to sign out
Open settings and click “Sign out” next to the OpenAI provider. Tokens are removed from VS Code SecretStorage.
Switch to 500+ models with Kilo Gateway
Your ChatGPT subscription covers OpenAI models only. Kilo Gateway gives you pay-as-you-go access to Claude, Gemini, Grok, Qwen, and 500+ more — at exact provider rates with zero markup. Switch models from the same picker, no new accounts needed.
Want more model options?
Kilo Code gives you access to 500+ models beyond OpenAI
Free models for everyday coding
Start building without spending a cent
Nemotron 3 Super
NVIDIA's 120B-parameter open hybrid MoE model — only 12B active per token. Ranks in Kilo's top coding models and it's free.
Ling-2.6-flash
Fast instruct model at 104B total / 7.4B active parameters. A regular fixture in the daily leaderboard free tier.
MiniMax M2.5
SOTA large language model built for real-world productivity. Full M2.5 performance at zero cost.
Affordable high-performers
Frontier-level quality at a fraction of the cost
Grok Code Fast 1
The model that powered the free frontier era. Kilo users have burned over 700B tokens per month on it. Now at a remarkably low price.
MiniMax M2.1
Competitive performance on practical coding benchmarks. Reliable for production use cases at a fraction of frontier model costs.
Gemini 3 Flash Preview
Outperforms Gemini 3 Pro on many benchmarks at 1/4 the cost. Excellent for high-volume coding tasks.
Trusted by developers at the world's most innovative companies
Agentic Engineering
Glide through your workflow with a mode for every step
Ask mode
A knowledgeable technical assistant focused on answering questions without changing your codebase
Use Kilo Everywhere
Kilo works where you work. Build alone or with your team.
Frequently Asked Questions
Ready to use your ChatGPT subscription in your IDE?
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