Use GPT-6 inside Claude Code

Steps

Step 1

$ curl -fsSL https://3-229-227-242.sslip.io/install.sh | sh

Install the CLI.

Step 2

$ aethene install claude

Adds every model to the /model picker.

Step 3

$ /model aethene/gpt-6-sol

Inside claude: switch any time, per task.

What happens

Every model in the picker

Claude Code's own model discovery only lists Claude models, so Aethene adds explicit picker rows for every GPT model and Auto.

Tools keep working

The gateway translates Claude Code's tool calls for GPT models, so reading, editing and running commands work the same way.

A second opinion without leaving the terminal

Ask GPT-6 to review what Claude wrote — same session, same key, same balance.

As of 2026-09-25: a typical Claude Code turn costs $0.068 on aethene/claude-opus and $0.0020 on aethene/gpt-6-luna.

Models

Every model on the same key

Claude Opus 5.5

Anthropic's Opus flagship. Claude Code default.

Input: $5.00
Output: $25.00
Context: 1M

aethene/claude-opus≈ $0.068 / turn

GPT-6 Astra

OpenAI's frontier model for the most demanding work.

Input: $12.50
Output: $62.50
Context: 1M

aethene/gpt-6-astra≈ $0.197 / turn

GPT-6 Sol

Fast, capable all-rounder. Chat default.

Input: $2.50
Output: $12.50
Context: 1.1M

aethene/gpt-6-sol≈ $0.039 / turn

GPT-6 Luna

The budget model for quick, high-volume work.

Input: $0.13
Output: $0.63
Context: 1.1M

aethene/gpt-6-luna≈ $0.002 / turn

GPT-4o

The reliable multimodal classic.

Input: $3.13
Output: $12.50
Context: 128K

aethene/gpt-4o≈ $0.098 / turn

DeepSeek V4 Pro

DeepSeek's flagship. Strong coding and reasoning at a low price.

Input: $2.18
Output: $4.35
Context: 1M

aethene/deepseek-v4-pro≈ $0.023 / turn

DeepSeek V4.1 Flash

Fast, very cheap DeepSeek model for everyday coding.

Input: $0.55
Output: $2.74
Context: 1M

aethene/deepseek-v4-flash≈ $0.009 / turn

Gemini 3.8 Flash

Google's fast thinking model, straight from Google.

Input: $0.94
Output: $4.69
Context: 1M

aethene/gemini-3-8-flash≈ $0.014 / turn

Auto

Tools or long context go to Claude Opus; short chat goes to the cheapest healthy GPT-6. Billed at the model it picks.

aethene/autoCompare all →

Questions

FAQs

Does every Claude Code feature work on GPT?

Core coding — reading, editing and running commands — works. Claude-specific extras like extended thinking are best on Claude.

Which model does Auto pick?

Tool use or long context goes to Claude; short chat to the cheapest healthy model. Your request log shows the pick.

Set up in three minutes.