GPT-6 Luna as a coding agent in your terminal
GPT-6 Luna by OpenAI, one of 250+ models you can use in Darce, the open source AI coding agent you can undo.
| Model | GPT-6 Luna |
|---|---|
| Vendor | OpenAI |
| Model id | openai/gpt-6-luna |
| Context window | 1.05M tokens |
| Price per 1M tokens | $0.10 input · $0.50 output (OpenRouter) |
| Can do | tool calling · reads images · reasoning |
| Category | Fast and cheap |
Strengths
A low-cost GPT-6 model. Good for routine edits, tests and quick questions when you want OpenAI quality at a small price.
OpenRouter's description:
GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol. It is suited for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic...
Use GPT-6 Luna as a coding agent in your terminal
Start Darce in your project with GPT-6 Luna:
npm install -g darce-cli
darce --model openai/gpt-6-lunaAlready in a session? Type /model openai/gpt-6-luna, or open the picker with Ctrl+P. Darce then reads your code, edits files and runs commands with GPT-6 Luna; risky commands ask first, and /undo reverses any change, including what shell commands did. No account yet? npx darce-cli lets you try it free. Which plan includes which models is on the pricing page.
Make it your default or a gear
In ~/.darcerc, set it as the starting model or add it to the gears you move between with Shift+↑ / Shift+↓ (see configuration):
{
"router": { "default": "openai/gpt-6-luna" },
"gears": ["qwen/qwen3-coder", "openai/gpt-6-luna"]
}Compare it on your own code
Benchmarks rarely match your repository. Race GPT-6 Luna against two other models on a real task and keep the best diff:
/derby --models openai/gpt-6-luna,openai/gpt-6.1-sol,openai/gpt-6-sol fix the failing testRead more about /derby and /swarm.
Related models
- GPT-6.1 Sol (OpenAI): 1.05M tokens, $2.00 / $10.00 per 1M tokens
- GPT-6 Sol (OpenAI): 1.05M tokens, $2.00 / $10.00 per 1M tokens
- GPT-6 Astra (OpenAI): 1.05M tokens, $10.00 / $50.00 per 1M tokens
- GPT-5.6 Sol (OpenAI): 1.05M tokens, $2.00 / $10.00 per 1M tokens
- Claude Haiku 5.5 (Anthropic): 1M tokens, $0.10 / $0.50 per 1M tokens
- Gemini 3.8 Flash (Google): 1.05M tokens, $0.75 / $3.75 per 1M tokens
- Gemini 3.5 Flash Lite (Google): 1.05M tokens, $0.30 / $2.50 per 1M tokens
- Qwen3 Coder Flash (Qwen (Alibaba)): 1M tokens, $0.20 / $0.97 per 1M tokens
All models · Getting started · Claude Code alternative
Model data from OpenRouter, refreshed daily. Prices are OpenRouter's list rates and show relative cost; your Darce allowance is used in proportion to them.