Quota & Model Routing Strategy

OriginRouter Coding Plan provides access to top-tier models under a fixed quota. The system dynamically adjusts model routing and channel selection based on the quota usage stage of your subscription tier. This strategy aims to maximize the number of available requests within the fixed quota and ensure, as much as possible, that the final request can complete without being cut off. You can enable or disable these policies at any time from the console.

This page explains how the strategy works and the available control switches.

This is a supplementary page to Coding Plan. For tier overview, supported models, and pricing, please refer to the main page.

Strategy Overview

The system classifies your subscription into usage stages based on daily / weekly quota consumption (taking the larger one), with each stage corresponding to a set of routing rules:

Stage	Routing Behavior
Normal	Default routing by tier, preferred channels
Mild	More economical routing when Economy Mode is enabled
Moderate	Preferred channels downgraded, lighter models and fallback routes activated
Heavy	Forced switch to cost-effective models
Extreme	Top tiers retain a buffer period, targets downgraded further
Exhausted	Behavior depends on Balance Fallback setting

Stage is computed on every /coding/* request in real time. Quota resets at 00:00 (UTC+8) daily or 00:00 (UTC+8) every Monday return the stage to Normal automatically.

Differences Across Tiers

Different subscription tiers have different downgrade depths at the same stage. The general patterns:

Go tier is the most aggressive, switching to lighter models earlier when quota tightens
Pro tier also applies downgrades under pressure, but retains slightly more channels than Go
Max / Ultra tiers retain more buffer before entering Heavy stage, with longer availability of top models

From the model perspective:

Top-tier models (e.g. Claude Opus series) experience the largest downgrade gap when quota tightens — this is the primary source of perceived "model capability change"
Models that are already lightweight or use proprietary channels (e.g. the MiniMax series) remain unchanged in most stages. Kimi models are currently unavailable on the Coding endpoint.
When Economy Mode is enabled, some previously stable lightweight models may also be routed through more cost-effective channels

Economy Mode

Economy Mode is an optional switch that voluntarily activates more economical routing earlier to extend your subscription's effective duration.

Behavior

Normal stage: Behaves the same as when disabled
Mild stage: A portion of requests use economical routing; when disabled, the behavior is the same as the Normal stage
Moderate stage and above: Economical routing is forced

Recommended For

Tasks dominated by code completion, formatting, and lightweight generation with modest intelligence requirements
Use cases where you want to preserve quota toward the end of the cycle

Not Recommended For

Architecture design, complex debugging, multi-file refactoring, and other tasks requiring top-model capability

This switch is enabled by default. You can toggle it at any time in the Console Subscription Settings.

Balance Fallback

Balance Fallback determines how the system behaves when quota is fully exhausted:

Setting	Behavior at Quota Exhaustion
Enabled	Automatically deduct from account balance to continue service; console notification is sent
Disabled	API requests return `402 subscription_quota_exceeded`; account balance is not consumed

Important Notes

Once Balance Fallback is enabled and quota is exhausted, all /coding/* requests will continue consuming account balance until it is also depleted
Recommended to enable near the end of a cycle or during critical tasks; keeping it disabled under normal circumstances avoids unintended charges

Night Peak Hours

During CST night peak hours, Gemini series models automatically place the GCP channel at the front of the routing list for improved stability. This behavior is purely time-window based and independent of quota stage.

How to Determine Your Current Stage

The system does not expose a public real-time stage query interface. You can infer it indirectly:

Sudden drop in response quality: usually indicates Moderate stage or higher
Check usage ratio in Usage Statistics
Receiving 402 subscription_quota_exceeded: quota is exhausted and Balance Fallback is disabled
Response quality recovers after temporarily disabling Economy Mode: likely was in Mild stage with Economy-triggered downgrades

Coding Plan — Tier overview, supported models, and pricing
API Errors — Details of 402 subscription_quota_exceeded and other errors
Usage Statistics — View real-time usage and quota consumption