diff --git a/.github/workflows/sunnypilot-build-model.yaml b/.github/workflows/sunnypilot-build-model.yaml
index dc02d1d8d..0943d1932 100644
--- a/.github/workflows/sunnypilot-build-model.yaml
+++ b/.github/workflows/sunnypilot-build-model.yaml
@@ -55,7 +55,7 @@ jobs:
           path: ${{ github.workspace }}/selfdrive/modeld/models/*.onnx
 
   build_model:
-    runs-on: self-hosted
+    runs-on: [self-hosted, tici]
     needs: get_model
     env:
       MODEL_NAME: ${{ inputs.custom_name || inputs.upstream_branch }} (${{ needs.get_model.outputs.model_date }})
@@ -71,7 +71,7 @@ jobs:
         with:
           path: ${{env.SCONS_CACHE_DIR}}
           key: scons-${{ runner.os }}-${{ runner.arch }}-${{ github.head_ref || github.ref_name }}-model-${{ github.sha }}
-          # Note: GitHub Actions enforces cache isolation between different build sources (PR builds, workflow dispatches, etc.) 
+          # Note: GitHub Actions enforces cache isolation between different build sources (PR builds, workflow dispatches, etc.)
           #   for security. Only caches from the default branch are shared across all builds. This is by design and cannot be overridden.
           restore-keys: |
             scons-${{ runner.os }}-${{ runner.arch }}-${{ github.head_ref || github.ref_name }}-model
diff --git a/.github/workflows/sunnypilot-build-prebuilt.yaml b/.github/workflows/sunnypilot-build-prebuilt.yaml
index 6cd5023a1..845e964d6 100644
--- a/.github/workflows/sunnypilot-build-prebuilt.yaml
+++ b/.github/workflows/sunnypilot-build-prebuilt.yaml
@@ -50,7 +50,7 @@ jobs:
     concurrency:
       group: build-${{ github.head_ref || github.ref_name }}
       cancel-in-progress: false
-    runs-on: self-hosted
+    runs-on: [self-hosted, tici]
     outputs:
       new_branch: ${{ steps.set-env.outputs.new_branch }}
       version: ${{ steps.set-env.outputs.version }}
diff --git a/sunnypilot/models/README.md b/sunnypilot/models/README.md
new file mode 100644
index 000000000..bf4fb72a9
--- /dev/null
+++ b/sunnypilot/models/README.md
@@ -0,0 +1,63 @@
+# Model Selector Version Compatibility
+
+This document explains the version compatibility mechanism used by the Model Selector system, and the rationale behind certain version constraints and JSON file management strategies.
+
+## Overview
+
+The Model Selector is responsible for selecting and validating model bundles based on their metadata and version constraints. Each model bundle is distributed via a JSON file and includes a `minimumSelectorVersion` field indicating the minimum selector version required to load it.
+
+To ensure robust compatibility and prevent mismatches between model expectations and selector capabilities, the selector enforces two version boundaries:
+
+* **`REQUIRED_MIN_SELECTOR_VERSION`**: the oldest selector version we support.
+* **`CURRENT_SELECTOR_VERSION`**: the current version of the selector logic.
+
+## Version Compatibility Check
+
+A model bundle is considered compatible if:
+
+```python
+REQUIRED_MIN_SELECTOR_VERSION <= bundle["minimumSelectorVersion"] <= CURRENT_SELECTOR_VERSION
+```
+
+This ensures:
+
+* **Old bundles are rejected** if they rely on deprecated selector behavior.
+* **Future bundles are ignored** if they expect logic that the current selector doesn't yet implement.
+
+## Handling Breaking Changes
+
+When a deep change in selector behavior requires *all* models to be recompiled (e.g., due to a major architectural update), we:
+
+1. **Create a new JSON file** (e.g., from `models_v4.json` to `models_v5.json`).
+2. **Assign updated `minimumSelectorVersion` values** in the new bundles.
+
+This allows older selector versions to continue using the previous JSON file, while newer versions point to the new one, preventing cross-contamination.
+
+## Why `REQUIRED_MIN_SELECTOR_VERSION` Still Matters
+
+Despite using new JSON files to isolate breaking changes, `REQUIRED_MIN_SELECTOR_VERSION` plays a critical role:
+
+### 1. **Cached Bundle Validation**
+
+Model bundles are cached locally (e.g., in-memory or on disk). A user might have previously loaded a now-invalid bundle from an older JSON file.
+
+`REQUIRED_MIN_SELECTOR_VERSION` prevents the selector from reloading or trusting that stale cached bundle, even if the original JSON is gone.
+
+### 2. **Explicit Deprecation Boundary**
+
+By raising `REQUIRED_MIN_SELECTOR_VERSION`, we declare older bundles officially unsupported, even if they technically still exist in a legacy JSON file.
+
+### 3. **Avoiding Race Conditions**
+
+Some clients may have intermittent access to updated JSONs. The runtime check ensures version compatibility is enforced independently of external file state.
+
+## Summary
+
+| Component                       | Purpose                                                               |
+| ------------------------------- | --------------------------------------------------------------------- |
+| `minimumSelectorVersion`        | Declares the minimum selector version required to load a model bundle |
+| `REQUIRED_MIN_SELECTOR_VERSION` | Prevents loading bundles that are too old (e.g., from stale cache)    |
+| `CURRENT_SELECTOR_VERSION`      | Prevents loading bundles that are too new or forward-incompatible     |
+| JSON file renaming              | Isolates bundles by selector generation to handle full recompiles     |
+
+This layered strategy ensures safe evolution of the model selection system while maintaining backward compatibility and runtime protection against stale or incompatible bundles.
diff --git a/sunnypilot/models/fetcher.py b/sunnypilot/models/fetcher.py
index 02ae52d77..9d0f4e318 100644
--- a/sunnypilot/models/fetcher.py
+++ b/sunnypilot/models/fetcher.py
@@ -115,7 +115,7 @@ class ModelCache:
 
 class ModelFetcher:
   """Handles fetching and caching of model data from remote source"""
-  MODEL_URL = "https://docs.sunnypilot.ai/driving_models_v4.json"
+  MODEL_URL = "https://docs.sunnypilot.ai/driving_models_v6.json"
 
   def __init__(self, params: Params):
     self.params = params
diff --git a/sunnypilot/models/helpers.py b/sunnypilot/models/helpers.py
index 61a7e1a00..2e9b63003 100644
--- a/sunnypilot/models/helpers.py
+++ b/sunnypilot/models/helpers.py
@@ -19,8 +19,9 @@ from openpilot.system.hardware import PC
 from openpilot.system.hardware.hw import Paths
 from pathlib import Path
 
-CURRENT_SELECTOR_VERSION = 7
-REQUIRED_MIN_SELECTOR_VERSION = 5
+# see the README.md for more details on the model selector versioning
+CURRENT_SELECTOR_VERSION = 8
+REQUIRED_MIN_SELECTOR_VERSION = 6
 
 USE_ONNX = os.getenv('USE_ONNX', PC)
 
diff --git a/tinygrad_repo b/tinygrad_repo
index 519dec667..7737cbb2a 160000
--- a/tinygrad_repo
+++ b/tinygrad_repo
@@ -1 +1 @@
-Subproject commit 519dec6677f98718ee4f2d07be1936eb91dde73b
+Subproject commit 7737cbb2a0635fce95a9085fb1b53d5bea1093f8