Built for Developers AI Coding Workspace
One account and one route for Claude Code, Codex and Gemini CLI.
Lower cost, steadier access and clearer billing.
An everyday coding all-in-one workspace✦
Lower cost and simpler setup, so every developer can use top AI coding models.
One Youyun API account lets you use Claude Code and Codex together. Unified API access and network routing give time back to your code instead of configuration panels.
One domain and one key format for common IDE plugins and CLI tools. Configure once and start coding.
Unified access for
Why choose Youyun API✦
Configured in 5 minutes
One domain and key format covers mainstream IDE plugins and CLI tools, so new users can start quickly.
Precise official-style billing
Pricing follows the official billing method, so every cost can be checked.

Youyun APIEvery call is auditable
Detailed call logs and cost records show what was spent and where it went.
Focused on coding
Only the models developers need most are connected, with continuous tuning for stability and speed.
Three AI engines, each in its lane✦
Claude, ChatGPT and Gemini work together, with each task routed to the model that fits best.
Claude
System design and complex reasoning
Strong at technical planning, code review and multi-step reasoning for steering the whole project.
Opus 4.8 · Sonnet 5 · Haiku 4.5
More Models
More integrations in progress
More top AI models are being connected to cover a wider range of coding workflows.
ChatGPT
Code generation and feature work
Strong at code generation, iteration and debugging, making it the daily driver for development.
GPT-5.5 · GPT-5.4
Gemini
Image understanding and visual tasks
Useful for turning designs into code, reading images and handling frontend visual workflows.
Gemini 3.5 Flash · Gemini 3.1 Pro
Works with your IDE✦
Configure Youyun API once to enable Claude coding assistance in VS Code and JetBrains. It understands project structure and code patterns, then gives contextual suggestions directly in the editor without copy and paste.
Model Pricing✦
| Model | Group | Ratio | Input (¥) | Output (¥) | Official (¥) | Discount |
|---|---|---|---|---|---|---|
| Claude Opus 4.8 | Claude Code | 3x | ¥15 | ¥75 | ¥35/¥175 | 43% |
| Claude Sonnet 5 | Claude Code | 3x | ¥6 | ¥30 | ¥14/¥70 | 43% |
| Claude Haiku 4.5 | Claude Code | 3x | ¥3 | ¥15 | ¥7/¥35 | 43% |
| GPT-5.5 | GPT Plus deal | 0.1x | ¥0.5 | ¥3 | ¥35/¥210 | 1.4% |
| GPT-5.4 | GPT Plus deal | 0.1x | ¥0.25 | ¥1.5 | ¥17.5/¥105 | 1.4% |