Claude Code setup (Grok 4.5)

Claude Code speaks Anthropic Messages. The gateway exposes POST /v1/messages so you can route traffic to your Grok group.

Recommended settings

Item	Value
`ANTHROPIC_BASE_URL`	`https://sub2api.lingshichat.top` (no `/v1`)
`ANTHROPIC_AUTH_TOKEN`	Your Arona API key
Model	`grok-4.5`

Claude Code appends /v1/messages to the base URL.
Use https://sub2api.lingshichat.top, not .../v1.
Including /v1 often produces /v1/v1/messages and 404.

1. Environment variables (fastest)

Windows PowerShell

$env:ANTHROPIC_BASE_URL = "https://sub2api.lingshichat.top"
$env:ANTHROPIC_AUTH_TOKEN = "sk-xxxxxxxx"
$env:ANTHROPIC_API_KEY = ""

macOS / Linux

export ANTHROPIC_BASE_URL="https://sub2api.lingshichat.top"
export ANTHROPIC_AUTH_TOKEN="sk-xxxxxxxx"

Then:

claude

/model grok-4.5

Or, if supported:

claude --model grok-4.5

2. `~/.claude/settings.json`

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://sub2api.lingshichat.top",
    "ANTHROPIC_AUTH_TOKEN": "sk-xxxxxxxx"
  }
}

Prefer storing only ANTHROPIC_BASE_URL in settings and injecting the token from the environment.

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://sub2api.lingshichat.top"
  }
}

3. Verify

curl https://sub2api.lingshichat.top/v1/messages \
  -H "Content-Type: application/json" \
  -H "x-api-key: $ANTHROPIC_AUTH_TOKEN" \
  -H "Authorization: Bearer $ANTHROPIC_AUTH_TOKEN" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "grok-4.5",
    "max_tokens": 128,
    "messages": [
      {"role": "user", "content": "ping"}
    ]
  }'

Some clients use x-api-key, others Authorization. Try both if one fails. In Claude Code:

Reply with only: ok

Pitfalls

Group must serve grok-4.5
Use gateway model IDs, not Claude official names (unless you intend a Claude group)
No extra path on base URL
Correct: https://sub2api.lingshichat.top
Wrong: .../v1 or .../claude

vs Grok Build

Item	Grok Build	Claude Code
Protocol	Responses / Chat Completions	Anthropic Messages
Base URL	includes `/v1`	no `/v1`
Config	`~/.grok/config.toml`	env / `~/.claude/settings.json`
web_search	needs `supports_backend_search`	depends on Claude Code tooling

Prefer Grok Build for Grok 4.5 coding agents when you can; use Claude Code when your workflow already depends on it.

FAQ

Issue	Fix
404	Remove accidental `/v1` on base URL
401	Check `ANTHROPIC_AUTH_TOKEN`
Model missing	Use `grok-4.5` and verify group
Still hits Anthropic	Ensure env vars are visible; restart shell

Get started

Clients (Grok 4.5)

Guides

API reference

Claude Code setup

Claude Code setup (Grok 4.5)

Recommended settings

1. Environment variables (fastest)

Windows PowerShell

macOS / Linux

2. `~/.claude/settings.json`

3. Verify

Pitfalls

vs Grok Build

FAQ

​Claude Code setup (Grok 4.5)

​Recommended settings

​1. Environment variables (fastest)

​Windows PowerShell

​macOS / Linux

​2. ~/.claude/settings.json

​3. Verify

​Pitfalls

​vs Grok Build

​FAQ

​Related

Claude Code setup (Grok 4.5)

Recommended settings

1. Environment variables (fastest)

Windows PowerShell

macOS / Linux

2. `~/.claude/settings.json`

3. Verify

Pitfalls

vs Grok Build

FAQ

Related