diff --git a/docs/model-chain.md b/docs/model-chain.md
index 47b8461..86a9e24 100644
--- a/docs/model-chain.md
+++ b/docs/model-chain.md
@@ -1,28 +1,18 @@
 # AI Model Chain — IT Pro Partner
 
 **Updated:** July 24, 2026
-**Active Policy:** Cost-Controlled Multi-Tier Fallback Chain
 
-## Chain Configuration
+## Active Fallback Chain
 
-| Tier | Model | Provider | Key / Endpoint | Notes |
-|---|---|---|---|---|
-| **Primary** | `claude-sonnet-5` | `admin-ai` | `~/.secure/hermes-normal-ops-key.json` | Main conductor via LiteLLM ($3.33/day cap) |
-| **Fallback 1** | `deepseek-v4-pro` | `admin-ai` | `~/.secure/hermes-normal-ops-key.json` | Primary workhorse fallback on admin-ai |
-| **Fallback 2** | `deepseek-v4-flash` | `admin-ai` | `~/.secure/hermes-normal-ops-key.json` | Fast low-cost fallback on admin-ai |
-| **Fallback 3** | `deepseek-chat` | `deepseek` | Direct DeepSeek API Key | Independent provider (survives admin-ai outage) |
-| **Fallback 4** | `grok-2-1212` | `xai` | Direct xAI API Key | Independent provider (survives admin-ai outage) |
+| Tier | Model | Provider | Notes |
+|---|---|---|---|
+| **Primary** | `claude-sonnet-5` | `admin-ai` | Conductor via LiteLLM ($3.33/day cap) |
+| **Fallback 1 (F1)** | `deepseek-v4-pro` | `deepseek` | Direct DeepSeek API |
+| **Fallback 2 (F2)** | `gpt-5.6-terra` | `admin-ai` | Demoted from Primary via LiteLLM ($3.33/day cap) |
+| **Fallback 3 (F3)** | `grok-4.5` (`grok-2-1212`) | `xai` | Direct xAI API |
+| **Fallback 4 (F4)** | `gemini-3.6-flash` | `google` | Direct Google API |
 
-## Admin-AI Proxy (LiteLLM)
-- **URL**: `https://admin-ai.itpropartner.com/v1` (app1, `152.53.36.131`)
-- **Master Key**: `/root/docker/litellm/.env` on app1 (Hudu [178] LiteLLM Master Key)
-- **Hermes Virtual Key**: `hermes-normal-ops-daily-capped` (`~/.secure/hermes-normal-ops-key.json`)
-- **Daily Budget Cap**: $3.33/day ($100/30-day cap)
-
-## Delegation Subagents
-- **Model**: `deepseek-v4-pro` via `admin-ai`
-- **Fallback**: `deepseek-v4-flash` via `admin-ai`
-
-## Excluded from Production Routing
-- **Gemini / Ollama**: Excluded from normal production routing per policy.
-- **GPT-5.6 / Terra / Opus**: Escalation-only, requires explicit approval and user confirmation.
+## Admin-AI Virtual Key
+- **Key Hash**: `0237186aaff1ed90295c00d73103103900d4bd07252ec1806af8a4358e45d37a`
+- **Allowed Models**: `claude-sonnet-5`, `gpt-5.6-terra`, `deepseek-v4-pro`, `deepseek-v4-flash`, `glm-5.2`, `MiniMax-M3`, `qwen3.7-plus`
+- **Daily Budget Cap**: $3.33 / day