---
title: "Sonnet 4.5. Released yesterday. Now live on DATS-4 SQL Agent Suite. Solid upgrade, but more 4.2 than 4.5."
slug: sonnet-4-5-released-yesterday-now-live-on-dats-4-sql-agent-suite-solid-upgrade-but-more-4-2-than
date_published: 2025-10-12T10:19:35.772Z
original_url: https://www.tigzig.com/post/sonnet-4-5-released-yesterday-now-live-on-dats-4-sql-agent-suite-solid-upgrade-but-more-4-2-than
source: migrated
processed_at: 2025-12-03T12:30:00.000Z
---

# Sonnet 4.5. Released yesterday. Now live on DATS-4 SQL Agent Suite. Solid upgrade, but more 4.2 than 4.5.

 PDF Report Available at
 [Database AI](https://www.tigzig.com/database-landing)

**Quality:** Sonnet 4 was already the best. 4.5 is clearly better, but not by a big margin.

**Cost:** Same as Sonnet 4.

**Assessment:** Initial assessment based on quick tests (see below/ docs). More to follow as I use it live.

**Scope:** Reasoning based advanced analysis in multi-step multi-agent setup.

## Quality Scores

* Claude Sonnet 4.5: 115
* Claude Sonnet 4: 100
* GPT-5: 95
* Qwen3 Max: 90
* DeepSeek R1: 85
* Gemini 2.5 Flash: 75

## Cost

Reasoning & planning cost for advanced analysis task in USD per 100 questions. Execution cost extra. See next paragraph / doc for details.

* Claude Sonnet 4.5: $6.5
* Claude Sonnet 4: $6.5
* GPT-5: $15.0
* Qwen3 Max: $2.0
* DeepSeek R1: $2.25
* Gemini 2.5 Flash: $1.75

## In multi-step advanced analysis, execution is the biggest chunk

In DATS-4 I use GPT-4.1 for execution at about $10 per 100 questions. A single-step SQL agent is much cheaper (GPT-4.1 = $2 per 100, 4.1-mini = $0.50, 4o-mini = $0.25).

## My recommendation: use single-step wherever possible

In my own live usage, approx. 80% of work runs through single-step agents. Multi-step - reserve for the tough analysis cases.

## Task Examples (tested live)

* Credit card data mart build (1M customers, 10M transactions, AWS RDS MySQL).
* Weighted score ranking of Indian issuers (RBI monthly file, Supabase).

## DATS-4

Full-stack Database SQL multi-agent: text-to-SQL, Python charts, stats, instant Postgres DB, PDF outputs, 9 reasoning models.

## Live App (free)

[app.tigzig.com](http://app.tigzig.com)

All credentials and API calls pass through my backend server. Free to test. For live use, deploy on your VPN.

Docs and source: open, full code at app site.

![Sonnet 4.5 Assessment](https://static.wixstatic.com/media/ef0c19_298bc1be8d0445b8868c73015fb57d4e~mv2.png/v1/fill/w_740,h_408,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/ef0c19_298bc1be8d0445b8868c73015fb57d4e~mv2.png)