OpenAI-compatible
For the OpenAI SDK, Codex, and most compatible clients.
/v1/chat/completionsUnified model access · A billing layer for agents
Turn model calls into a clearer route
One key, one bill, several protocols. Mengbi Router connects Claude, GPT, Gemini, and more so access, cost, and usage live in one workbench.
✦ Manage your keys, models, and usage from the console.
Mengbi Router Service available
Your appRoute and meterModel APIs
SDKAgent or appOne SDK call
TRMengbi RouterRoute · meter · record
∞AI modelsClaude / GPT / Gemini
API protocol compatibility
Keep your SDK. Change one line.
Choose the protocol that matches your existing tools instead of rebuilding your call layer.
Anthropic native
For Claude Code with native messages and streaming events.
/v1/messagesGemini native
For Gemini CLI and apps using the native Gemini protocol.
/v1beta/models/*Routing and billing
Built for long context and agent work
Model routing, caching, availability, and spend tracking meet at one boundary.
One key
Connect multiple model families and protocols.
Traceable spend
See model, tokens, and final charge per request.
Switchable routes
Choose a lane for speed or cost.
No silent downgrade
Keep requested and returned models verifiable.
Quick integration
Run your first request in three moves
Create an account and key
Create project keys in the console; keep the primary credential off clients.
Choose a protocol and model
Match your SDK to the OpenAI, Anthropic, or Gemini endpoint.
Review usage and billing
Reconcile tokens, discounts, and final charges at request level.
Current model pricing
Current model pricing
Compare input, output, and cache prices for every available model.
| Model | Input (Official) | Input (Mengbi) | Discount | Output (Official) | Output (Mengbi) | Discount |
|---|---|---|---|---|---|---|
| Claude Fable 5claude-fable-5 | $10.00Cache $1 | $4.29Cache $0.428572 | 57% OFF | $50.00 | $21.43 | 57% OFF |
| Claude Opus 4.8claude-opus-4-8 | $5.00Cache $0.5 | $2.15Cache $0.214286 | 57% OFF | $25.00 | $10.72 | 57% OFF |
| Claude Opus 5claude-opus-5 | $5.00Cache $0.5 | $2.15Cache $0.214286 | 57% OFF | $25.00 | $10.72 | 57% OFF |
| Claude Sonnet 5claude-sonnet-5 | $2.00Cache $0.2 | $0.86Cache $0.085715 | 57% OFF | $10.00 | $4.29 | 57% OFF |
| DeepSeek V4 Flash 福利版deepseek-v4-flash-free | $0.44Cache $0.007 | $0.01Cache $0.00001 | 99% OFF | $1.32 | $0.01 | 99% OFF |
| DeepSeek V4 Pro 福利版deepseek-v4-pro-free | $1.32Cache $0.022 | $0.01Cache $0.000032 | 99% OFF | $3.96 | $0.01 | 99% OFF |
| Gemini 3.1 Pro Previewgemini-3.1-pro-preview | $2.00Cache $0.2 | $1.72Cache $0.171429 | 14% OFF | $12.00 | $10.29 | 14% OFF |
| Gemini 3.6 Flashgemini-3.6-flash | $0.75Cache $0.075 | $0.65Cache $0.064286 | 14% OFF | $3.75 | $3.22 | 14% OFF |
| Gemini 3.7 Flashgemini-3.7-flash | $0.75Cache $0.075 | $0.65Cache $0.064286 | 14% OFF | $3.75 | $3.22 | 14% OFF |
| GPT-5.4gpt-5.4 | $2.50Cache $0.25 | $0.36Cache $0.035715 | 85% OFF | $15.00 | $2.15 | 85% OFF |
| GPT-5.4-Minigpt-5.4-mini | $0.75Cache $0.075 | $0.11Cache $0.010715 | 85% OFF | $4.50 | $0.65 | 85% OFF |
| GPT-5.5gpt-5.5 | $5.00Cache $0.5 | $0.72Cache $0.071429 | 85% OFF | $30.00 | $4.29 | 85% OFF |
| GPT-5.6 Lunagpt-5.6-luna | $0.20Cache $0.02 | $0.03Cache $0.002858 | 85% OFF | $1.20 | $0.18 | 85% OFF |
| GPT-5.6 Solgpt-5.6-sol | $5.00Cache $0.5 | $0.72Cache $0.071429 | 85% OFF | $30.00 | $4.29 | 85% OFF |
| GPT-5.6 Terragpt-5.6-terra | $2.00Cache $0.2 | $0.29Cache $0.028572 | 85% OFF | $12.00 | $1.72 | 85% OFF |
OPENAI-COMPATIBLE / SERVER ENVIRONMENTKEY NEVER IN BROWSER
const client = new OpenAI({
apiKey: process.env.MENGBI_ROUTER_KEY,
baseURL: process.env.MENGBI_ROUTER_BASE_URL,
})MENGbi / ROUTER
Give your next agent task a clearer route.
Start small, verify protocol, model, and cost, then move into production workflows.