Model Selector - Julius

Overview

Julius lets you choose which AI model powers your analysis. Use the Model Selector in the chat dropdown to switch between models depending on your task. Models are split into two groups: Julius models (tuned for data analysis) and General models (third-party models from OpenAI, Anthropic, xAI, Meta, and Moonshot AI).

Julius models

Julius models are purpose-built for data work. They’re the default and the best starting point for most tasks.

Model	Available on	Best for
Julius 1.2 Lite	All plans	Quick answers to simple questions
Julius 1.2	Paid plans	Most questions and everyday analysis
Julius 1.2 Max	Paid plans	Complex, multi-step analysis
Julius 1.2 Ultra	Max plan and above	The most demanding, multi-step work

General models

You can also use third-party models directly. These are useful when you want a different reasoning style or want to compare outputs.

Model	Available on	Description
GPT-6 Astra	Paid plans	OpenAI’s most capable model
Claude Opus 5.5	Paid plans	The most powerful model from Anthropic
Claude Sonnet 5.5	Paid plans	A fast, balanced model from Anthropic
Claude Fable 5.1	Paid plans	The flagship Mythos-class model from Anthropic
Grok 4.7	Paid plans	The smartest and strongest model from xAI
Muse Spark 1.3	Paid plans	Meta’s multi-modal reasoning model
Kimi K3	Paid plans	Moonshot AI’s large language model

Plan availability can change. Check your workspace settings for the most current details.

Choosing the right model

Start with Julius 1.2 unless you have a specific reason to switch. It’s tuned for data analysis and handles most tasks well.
Use Julius 1.2 Max (or Julius 1.2 Ultra on higher plans) for complex prompts that involve multiple steps or large datasets.
Use Julius 1.2 Lite when you need a fast answer to a simple question.
Try a General model for a different reasoning style, or to compare outputs across providers.

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