Bumo Router

gemini-4-hydrogen API

Call Google's gemini-4-hydrogen with one Bumo Router key — OpenAI & Anthropic compatible, pay per token.

Create API Key
Tool calling
Vision
Reasoning
Long context
Pricing$ / 1M tokens
Input
$1.59
Output
$7.95
Cache Read
$0.0795
Context
1M
Quick start
curl https://router.bumo.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "gemini-4-hydrogen",
    "messages": [{ "role": "user", "content": "Hello" }]
  }'
Web search: use gemini-4-hydrogen:online and the model searches the web first, then answers with sources. $0.0008 per search, free if nothing is found.
Try it