diff --git a/modules/civitai/basemodels_civitai.py b/modules/civitai/basemodels_civitai.py
new file mode 100644
index 000000000..4b9a5c072
--- /dev/null
+++ b/modules/civitai/basemodels_civitai.py
@@ -0,0 +1,134 @@
+import re
+import time
+from modules.logger import log
+
+
+# Canonical base-model metadata lives in the civitai/civitai repo. The live
+# /images validator is generated from it, so the file has metadata (group,
+# ecosystem, engine, hidden) while the validator has the current name list.
+# Callers merge both.
+github_cache: list[dict] = []
+github_cache_time: float = 0
+GITHUB_TTL = 6 * 3600  # 6 hours
+GITHUB_URL = 'https://raw.githubusercontent.com/civitai/civitai/main/src/shared/constants/base-model.constants.ts'
+
+
+def parse_base_model_config(ts_source: str) -> list[dict]:
+    """Parse the baseModelConfig array from base-model.constants.ts.
+
+    Uses character-by-character bracket walking rather than regex because
+    entries can span multiple lines. Returns list of dicts with keys
+    name/type/group/hidden plus optional ecosystem/engine/family.
+    """
+    start_match = re.search(r'const\s+baseModelConfig\s*=\s*\[', ts_source)
+    if not start_match:
+        return []
+    # Walk to the matching ] respecting string literals
+    pos = start_match.end()
+    depth = 1
+    in_string: str | None = None
+    end_pos = -1
+    while pos < len(ts_source):
+        ch = ts_source[pos]
+        if in_string is not None:
+            if ch == '\\':
+                pos += 2
+                continue
+            if ch == in_string:
+                in_string = None
+        else:
+            if ch in ("'", '"', '`'):
+                in_string = ch
+            elif ch == '[':
+                depth += 1
+            elif ch == ']':
+                depth -= 1
+                if depth == 0:
+                    end_pos = pos
+                    break
+        pos += 1
+    if end_pos < 0:
+        return []
+    array_body = ts_source[start_match.end():end_pos]
+    # Extract top-level {...} entries, respecting strings and nested braces
+    entries: list[str] = []
+    brace_start = -1
+    brace_depth = 0
+    in_string = None
+    i = 0
+    while i < len(array_body):
+        ch = array_body[i]
+        if in_string is not None:
+            if ch == '\\':
+                i += 2
+                continue
+            if ch == in_string:
+                in_string = None
+        else:
+            if ch in ("'", '"', '`'):
+                in_string = ch
+            elif ch == '{':
+                if brace_depth == 0:
+                    brace_start = i
+                brace_depth += 1
+            elif ch == '}':
+                brace_depth -= 1
+                if brace_depth == 0 and brace_start >= 0:
+                    entries.append(array_body[brace_start:i + 1])
+                    brace_start = -1
+        i += 1
+    # Per-entry field extraction (string + bool values only)
+    field_re = re.compile(
+        r"(\w+)\s*:\s*(?:'([^'\\]*(?:\\.[^'\\]*)*)'|\"([^\"\\]*(?:\\.[^\"\\]*)*)\"|(true|false))"
+    )
+    parsed: list[dict] = []
+    for entry in entries:
+        fields: dict = {}
+        for m in field_re.finditer(entry):
+            key = m.group(1)
+            if m.group(2) is not None:
+                fields[key] = m.group(2)
+            elif m.group(3) is not None:
+                fields[key] = m.group(3)
+            elif m.group(4) is not None:
+                fields[key] = m.group(4) == 'true'
+        if 'name' in fields and 'type' in fields and 'group' in fields:
+            item: dict = {
+                'name': fields['name'],
+                'type': fields['type'],
+                'group': fields['group'],
+                'hidden': bool(fields.get('hidden', False)),
+            }
+            for opt in ('ecosystem', 'engine', 'family'):
+                if opt in fields:
+                    item[opt] = fields[opt]
+            parsed.append(item)
+    return parsed
+
+
+def fetch_github_base_models() -> list[dict]:
+    """Fetch and parse civitai's base-model constants from GitHub.
+
+    Returns list of metadata dicts (name, type, group, hidden, plus
+    optional ecosystem/engine/family). Returns [] on any failure;
+    callers fall back to the live /images probe. Cached with a longer
+    TTL than discover_options since these constants change rarely.
+    """
+    global github_cache, github_cache_time  # pylint: disable=global-statement
+    now = time.time()
+    if github_cache and (now - github_cache_time) < GITHUB_TTL:
+        return github_cache
+    try:
+        from modules import shared
+        r = shared.req(GITHUB_URL)
+        if r.status_code != 200:
+            log.debug(f'CivitAI github constants: code={r.status_code}')
+            return []
+        parsed = parse_base_model_config(r.text)
+        if parsed:
+            github_cache = parsed
+            github_cache_time = now
+        return parsed
+    except Exception as e:
+        log.debug(f'CivitAI github constants fetch failed: {e}')
+        return []
diff --git a/modules/civitai/client_civitai.py b/modules/civitai/client_civitai.py
index fc99e15be..c24306d90 100644
--- a/modules/civitai/client_civitai.py
+++ b/modules/civitai/client_civitai.py
@@ -1,6 +1,7 @@
 import os
 import time
 from modules.logger import log
+from modules.civitai.basemodels_civitai import fetch_github_base_models
 from modules.civitai.models_civitai import CivitModel, CivitVersion, CivitImage, CivitSearchResponse, CivitTagResponse, CivitCreatorResponse, CivitUserProfile
 
 
@@ -202,7 +203,7 @@ class CivitaiClient:
         if options_cache and (now - options_cache_time) < OPTIONS_TTL:
             return options_cache
         from modules import shared
-        result: dict = {'types': [], 'sort': [], 'period': [], 'base_models': []}
+        result: dict = {'types': [], 'sort': [], 'period': [], 'base_models': [], 'base_models_info': []}
         # Send invalid params to trigger 400 with valid enum values in error response
         probes = [
             ('types', '/models', {'types': '__invalid__'}),
@@ -255,9 +256,22 @@ class CivitaiClient:
                             break
             except Exception as e:
                 log.debug(f'CivitAI discover options: key={key} {e}')
+        # Merge live probe names with github metadata. The probe is the source
+        # of truth for which names exist; github provides per-entry metadata and
+        # doubles as a fallback name list if the probe returned empty.
+        github_entries = fetch_github_base_models()
+        github_index: dict = {entry['name']: entry for entry in github_entries}
+        probe_names: list = result['base_models']
+        if not probe_names and github_entries:
+            probe_names = [entry['name'] for entry in github_entries]
+            result['base_models'] = probe_names
+        result['base_models_info'] = [
+            github_index.get(name, {'name': name, 'type': 'image', 'group': '', 'hidden': False})
+            for name in probe_names
+        ]
         options_cache = result
         options_cache_time = now
-        log.debug(f'CivitAI options: types={len(result["types"])} sort={len(result["sort"])} period={len(result["period"])} base_models={len(result["base_models"])}')
+        log.debug(f'CivitAI options: types={len(result["types"])} sort={len(result["sort"])} period={len(result["period"])} base_models={len(result["base_models"])} (enriched={len(github_index)})')
         return result