AI SQL Tuner Studio v1.0.25.0 is here, and it’s a big one. This release upgrades the default AI endpoint to GPT-5.3-Codex, bringing more accurate analysis, a larger context window, and three powerful new features for SQL Server DBAs and developers.
New Default AI Endpoint: GPT-5.3-Codex
The biggest change in v1.0.25.0 is the new default AI model. GPT-5.3-Codex replaces GPT-5.2 as the engine behind every analysis in AI SQL Tuner Studio. You’ll notice more accurate index recommendations, sharper code review feedback, and better overall results across the board. The larger context window also means the AI can process significantly more data per analysis, which directly powers the new features below.
Query Store Data Now Powers Index Tuning
Index tuning in AI SQL Tuner Studio now pulls in Query Store information to give the AI a much richer picture of your workload. Instead of relying solely on the plan cache and metadata like missing index DMVs, the AI can now analyze actual execution patterns, resource consumption, and plan regressions. The result is index recommendations that are more targeted and grounded in how your SQL Server is actually being used.
Code Review Now Handles Up to 100 Objects
Thanks to GPT-5.3-Codex’s expanded context window, the Code Review feature can now analyze up to 100 database objects in a single pass. That means you can review stored procedures, views, functions, and triggers at scale without having to break your analysis into smaller batches. If you manage a large database with dozens of T-SQL objects, this update saves you significant time and effort.
Backup Validation in Server Health Check
Server Health Check now includes backup validation as part of its analysis. It verifies that your databases have recent backups, flags any that are missing or stale, and surfaces potential recovery gaps before they become emergencies. This is a critical addition for production environments where backup coverage is non-negotiable.
Download AI SQL Tuner Studio v1.0.25.0
Version 1.0.25.0 is available now as a free download. If you’re already running AI SQL Tuner Studio, simply download the latest installer and run it to update. All your existing settings and configurations will be preserved.
AI SQL Tuner Studio v1.0.25.0 is a desktop application for SQL Server performance tuning. Whether you are a DBA managing production workloads or a developer writing T-SQL, this release delivers meaningful improvements across index tuning, code review, and server health. The move to GPT-5.3-Codex means every analysis is backed by a more capable AI with a larger context window, giving you actionable insights that were previously out of reach.
