Introduction
Pencil supports several of the best, state-of-the-art Text Generation models that can help you generate creative brand-safe copy. These models are powerful tools, especially when drawing from your Brand Library, and used with skilled Prompting. Some of the use cases include:
Generating and iterating taglines, CTAs and other short-form copy
Generating strategic-copy - audience personas, customer insights and targeted suggestions
Generating creative product descriptions in both long-form and short-form contexts.
Translation of copy into a range of languages
Generating copy for email campaigns and blog posts
What Models Does Pencil Support?
For Text Generation Pencil supports the following models:
Text Generation:
Gemini 3.1 Pro Preview Instant
Gemini 3.1 Pro Preview Thinking
Gemini 3 Flash Preview Instant
Gemini 3 Flash Preview Thinking
Gemini 3.1 Flash Preview Lite Instant
Gemini 3.1 Flash Preview Lite Thinking
Google Gemini 2.5 Pro
Google Gemini 2.5 Flash
OpenAI GPT-5.4 Instant
OpenAI GPT-5.4 Thinking
OpenAI GPT-5.2 Instant
OpenAI GPT-5.2 Thinking
OpenAI GPT-5.1 Instant
OpenAI GPT-5.1 Thinking
OpenAI GPT-5
OpenAI GPT-5 Mini
OpenAI GPT-5 Nano
OpenAI GPT-4.1
OpenAI GPT-4o
OpenAI o4 mini
OpenAI o3
OpenAI o3 mini
We are always working to add to our list of supported models.
Cost / generation of the various models can be found here:
Cost
Summary
There’s no single 'best' model - each has its strengths. Choose based on what you’re trying to achieve, and feel free to switch as your needs evolve. You can switch between models at any point, depending on whether you’re exploring widely or refining towards a final version.