chore: update default codex model to databricks-gpt-5-3-codex

Closes #102

Author: datasciencemonkey

README.md

@@ -283,7 +283,7 @@ This template repo opens that vision up for every Databricks user — no IDE set
 | `DATABRICKS_TOKEN` | No | Optional. If not set, the app prompts for a token on first session. Auto-rotated every 10 minutes |
 | `HOME` | Yes | Set to `/app/python/source_code` in app.yaml |
 | `ANTHROPIC_MODEL` | No | Claude model name (default: `databricks-claude-opus-4-6`) |
-| `CODEX_MODEL` | No | Codex model name (default: `databricks-gpt-5-2`) |
+| `CODEX_MODEL` | No | Codex model name (default: `databricks-gpt-5-3-codex`) |
 | `GEMINI_MODEL` | No | Gemini model name (default: `databricks-gemini-3-1-pro`) |
 | `DATABRICKS_GATEWAY_HOST` | No | AI Gateway URL override. Auto-discovered from `DATABRICKS_WORKSPACE_ID` if unset |
 

app.yaml

@@ -9,6 +9,6 @@ env:
   - name: GEMINI_MODEL
     value: databricks-gemini-3-1-pro
   - name: CODEX_MODEL
-    value: databricks-gpt-5-2
+    value: databricks-gpt-5-3-codex
   - name: CLAUDE_CODE_DISABLE_AUTO_MEMORY
     value: 0

docs/deployment.md

@@ -68,7 +68,7 @@ databricks apps deploy <your-app-name> \
 | `DATABRICKS_TOKEN` | No | Optional. If not set, the app prompts for a token on first session. Auto-rotated every 10 minutes |
 | `HOME` | Yes | Set to `/app/python/source_code` in app.yaml |
 | `ANTHROPIC_MODEL` | No | Claude model name (default: `databricks-claude-opus-4-6`) |
-| `CODEX_MODEL` | No | Codex model name (default: `databricks-gpt-5-2`) |
+| `CODEX_MODEL` | No | Codex model name (default: `databricks-gpt-5-3-codex`) |
 | `GEMINI_MODEL` | No | Gemini model name (default: `databricks-gemini-3-1-pro`) |
 | `DATABRICKS_GATEWAY_HOST` | No | AI Gateway URL override. Auto-discovered from `DATABRICKS_WORKSPACE_ID` if unset. Falls back to direct model serving if neither is available |
 

setup_codex.py

@@ -22,7 +22,7 @@
 
 host = os.environ.get("DATABRICKS_HOST", "")
 token = os.environ.get("DATABRICKS_TOKEN", "")
-codex_model = os.environ.get("CODEX_MODEL", "databricks-gpt-5-2")
+codex_model = os.environ.get("CODEX_MODEL", "databricks-gpt-5-3-codex")
 
 # 1. Install Codex CLI into ~/.local/bin (always, even without token)
 local_bin = home / ".local" / "bin"