Endpoints and Models

Open the model list

1. Go to the dashboard and click Model list in the left sidebar.
2. Use the page to view the currently enabled model names.
3. Copy the model id exactly as shown.

Which base URL should I use?

Use case	Base URL
Claude Code and Anthropic-native clients	https://api.fhrouter.com
OpenAI-compatible clients	https://api.fhrouter.com/v1
Codex CLI	https://api.fhrouter.com/v1
Gemini CLI and Antigravity	https://api.fhrouter.com/v1beta

How to Check Model Names by API

curl https://api.fhrouter.com/v1/models \
  -H "Authorization: Bearer YOUR_FHROUTER_API_KEY"

Current Public Model Ids

Family	Model id
Claude	claude-sonnet-4-6
Claude	claude-opus-4-6
Claude	claude-opus-4-7
Claude	claude-opus-4-8
GPT/Codex	gpt-5.4-mini
GPT/Codex	gpt-5.4
GPT/Codex	gpt-5.5
Gemini	gemini-2.5-pro
Gemini	gemini-3.1-pro-preview

gemini-2.5-flash-lite is also enabled as a Gemini CLI compatibility route.

The live dashboard is the source of truth if the public list changes after a model refresh.

Curl Command Reference

GPT / Codex

curl https://api.fhrouter.com/v1/responses \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_FHROUTER_API_KEY" \
  -d '{
    "model": "gpt-5.5",
    "input": "Hello"
  }'

Claude

curl https://api.fhrouter.com/v1/messages \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_FHROUTER_API_KEY" \
  -d '{
    "model": "claude-sonnet-4-6",
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ],
    "max_tokens": 1024
  }'

Gemini

curl "https://api.fhrouter.com/v1beta/models/gemini-3.1-pro-preview:generateContent" \
  -H "Content-Type: application/json" \
  -H "x-goog-api-key: YOUR_FHROUTER_API_KEY" \
  -d '{
    "contents": [
      {
        "role": "user",
        "parts": [
          {
            "text": "Hello"
          }
        ]
      }
    ]
  }'