diff --git a/README.md b/README.md
index 6698bd1..fda600e 100644
--- a/README.md
+++ b/README.md
@@ -11,9 +11,10 @@ gh extension install prdlk/gh-commit
 ### Requirements
 
 - [uv](https://docs.astral.sh/uv) — Python package runner (handles dependencies automatically)
-- [Crush](https://github.com/charmbracelet/crush) — configured with an authenticated model provider
+- [Crush](https://github.com/charmbracelet/crush) — non-interactive AI runner
+- `GROQ_API_KEY` — authenticates the default Groq model
 
-By default, gh-commit uses `openrouter/qwen/qwen3.6-27b`. Configure OpenRouter in Crush or override the model with `GH_COMMIT_CRUSH_MODEL`.
+By default, gh-commit uses Groq's `openai/gpt-oss-120b`. Override the model with `GH_COMMIT_CRUSH_MODEL`.
 
 ## Usage
 
@@ -77,7 +78,7 @@ The former Mods roles now live directly in `smartcommit.py`, so gh-commit no lon
 | `GH_COMMIT_PUSH=1` | Auto-push after commits |
 | `GH_COMMIT_NO_AUTO_REFRESH=1` | Don't auto-regenerate scopes when `.gitignore` changes |
 | `GH_COMMIT_CRUSH_CMD` | Override the Crush command (default `crush`) |
-| `GH_COMMIT_CRUSH_MODEL` | Override the Crush model (default `openrouter/qwen/qwen3.6-27b`) |
+| `GH_COMMIT_CRUSH_MODEL` | Override the Crush model (default `groq/openai/gpt-oss-120b`) |
 | `GH_COMMIT_CRUSH_TIMEOUT` | Per-prompt timeout in seconds (default `120`) |
 | `GH_COMMIT_DEBUG=1` | Show scope-response parse diagnostics |
 
diff --git a/crush-provider/crush.json b/crush-provider/crush.json
new file mode 100644
index 0000000..67a528a
--- /dev/null
+++ b/crush-provider/crush.json
@@ -0,0 +1,18 @@
+{
+  "$schema": "https://charm.land/crush.json",
+  "providers": {
+    "groq": {
+      "type": "openai-compat",
+      "base_url": "https://api.groq.com/openai/v1",
+      "api_key": "$GROQ_API_KEY",
+      "models": [
+        {
+          "id": "openai/gpt-oss-120b",
+          "name": "GPT-OSS 120B on Groq",
+          "context_window": 131072,
+          "default_max_tokens": 8192
+        }
+      ]
+    }
+  }
+}
diff --git a/gh-commit.tar.gz b/gh-commit.tar.gz
index 0ec1df6..0f12509 100644
Binary files a/gh-commit.tar.gz and b/gh-commit.tar.gz differ
diff --git a/smartcommit.py b/smartcommit.py
index 1d0acd5..d08f306 100644
--- a/smartcommit.py
+++ b/smartcommit.py
@@ -44,7 +44,9 @@ DB_PATH = DB_DIR / "gh-commit.db"
 # Crush handles both AI steps in non-interactive mode. The instructions formerly
 # stored as mods roles are embedded below so this tool is self-contained.
 CRUSH_CMD = os.environ.get("GH_COMMIT_CRUSH_CMD", "crush").split()
-CRUSH_MODEL = os.environ.get("GH_COMMIT_CRUSH_MODEL", "openrouter/qwen/qwen3.6-27b")
+DEFAULT_CRUSH_MODEL = "groq/openai/gpt-oss-120b"
+CRUSH_MODEL = os.environ.get("GH_COMMIT_CRUSH_MODEL", DEFAULT_CRUSH_MODEL)
+CRUSH_CONFIG_DIR = Path(__file__).with_name("crush-provider")
 CRUSH_TIMEOUT = int(os.environ.get("GH_COMMIT_CRUSH_TIMEOUT", "120"))
 
 AUTO_CONFIRM = os.environ.get("GH_COMMIT_AUTO", "0") == "1"
@@ -115,9 +117,12 @@ def crush_prompt(text: str, cwd: Path) -> str:
     cmd = [*CRUSH_CMD, "run", "--quiet"]
     if CRUSH_MODEL:
         cmd += ["--model", CRUSH_MODEL]
+    env = os.environ.copy()
+    if CRUSH_MODEL == DEFAULT_CRUSH_MODEL:
+        env.setdefault("CRUSH_GLOBAL_CONFIG", str(CRUSH_CONFIG_DIR))
     try:
         result = subprocess.run(
-            cmd, input=text, capture_output=True, text=True,
+            cmd, input=text, capture_output=True, text=True, env=env,
             cwd=str(cwd), timeout=CRUSH_TIMEOUT,
         )
     except FileNotFoundError as e:
@@ -672,7 +677,7 @@ def cmd_help():
     console.print("  GH_COMMIT_PUSH=1           Auto-push after commits")
     console.print("  GH_COMMIT_NO_AUTO_REFRESH=1  Don't auto-regenerate scopes on .gitignore change")
     console.print("  GH_COMMIT_CRUSH_CMD=...    Override the Crush command")
-    console.print("  GH_COMMIT_CRUSH_MODEL=...  Override the Crush model (default: openrouter/qwen/qwen3.6-27b)")
+    console.print(f"  GH_COMMIT_CRUSH_MODEL=...  Override the Crush model (default: {DEFAULT_CRUSH_MODEL})")
     console.print("  GH_COMMIT_CRUSH_TIMEOUT=...  Per-prompt timeout in seconds (default: 120)")
     console.print("  GH_COMMIT_DEBUG=1          Show parse diagnostics\n")
     console.print("[cyan]Scopes auto-refresh whenever .gitignore changes.[/]")