Frequently asked questions
What an API gateway is, why it costs less, and how to connect — on one page.
What is 9Coding?
9Coding is an independent third-party model access platform — an API gateway. Over 40 models, including Claude, GPT and Gemini, sit behind a single endpoint. With one key and a one-line base_url change you can call any of them from Claude Code, Cursor, the OpenAI SDK or any HTTP client, at a fraction of official pricing.
Why does it cost less than official pricing?
The savings come from the supply side: bulk purchasing, several upstream channels, and routing idle capacity to whoever needs it. Buying alone at list price can't match that.
On the meter, 1 credit equals $1 of official-price usage. The monthly plan is ¥199 and carries $358 of official-price usage — the same volume bought directly would run about ¥2,500. The discount isn't a slogan; you can do the arithmetic yourself.
How is it different from the official API? Do I have to change my code?
The interface follows the OpenAI and Anthropic specifications exactly, so your existing code only needs its base_url and key changed. What differs: lower price, one key for every model, and availability managed by the platform.
Stated plainly: 9Coding is a third-party platform with no affiliation to or endorsement from Anthropic, OpenAI or Google. Our answer on reliability is multiple upstream channels with automatic failover — "here today, here tomorrow" is the standard we hold ourselves to.
Which models are supported?
The full Claude lineup (Opus 4.8, Fable 5, Sonnet 5), the full GPT lineup including GPT-5.6, plus Gemini, DeepSeek, Grok and Kimi — over 40 models, with new releases added as they ship. Subscriptions cover the main Claude and GPT models; everything else bills as you go.
Should I subscribe or pay as I go?
If you code every day, subscribe — the ¥199 monthly plan works out to under ¥7 a day. If your usage is occasional or spiky, top up and pay as you go: credits land one to one and never expire. The two aren't exclusive. A subscription covers daily work, pay-as-you-go absorbs overflow, and a per-key switch decides whether you roll over automatically or stop at the daily limit.
How do I connect Claude Code, Cursor, or my own code?
All three have step-by-step guides: Claude Code (two environment variables), Cursor (override the base URL in settings), and the OpenAI SDK (change one line).
What does "released daily" mean?
A subscription's total allowance is divided across its term and released one day at a time — about $12 a day on the monthly plan, about $33 on Max. Whatever you don't use that day doesn't roll over. That mechanism is exactly why a subscription costs so much less than metered usage.
How do I get started?
Hit "Start free" in the top right, create a key, change one line of base_url and you're running. Questions are welcome in the Telegram group.