You know when content feels like the writer really gets you? GPT-4.5 brings that level of connection through its built-in emotional intelligence. Inside Agility Writer’s workflow, it doesn’t just pass originality.ai’s detection, it flows naturally, shows real personality, and reasons like a person.
GPT-4.5 Pro and Lite
Agility Writer added two GPT-4.5 models, both in beta.
GPT-4.5 Pro offers wider knowledge and improved emotional understanding, and is the top choice for content that won’t get flagged by AI detection tools. It uses our full, established workflow to maximize quality, which makes it our priciest model. Pricing scales by outline count: 6 credits for up to 10 outlines, 10 for 11–20, 14 for 21–30, 18 for 31–40, 22 for 41–50, and 26 for over 50.
GPT-4.5 Lite uses advanced prompt engineering and combines multiple models, with GPT-4.5 handling the final output, for excellent human-like content at a lower cost. Its detection avoidance is slightly lower than Pro, and it works best with the Anti-AI Detection Concise Tone style. Pricing: 4 credits for up to 10 outlines, 6 for 11–20, 8 for 21–30, 10 for 31–40, 12 for 41–50, and 14 for over 50.
Offering both lets you match the model to your content needs and budget.
Tested against originality.ai
Both models were tested extensively against originality.ai (Lite 1.0.0), one of the most rigorous detection tools, using six topics each across niches and the same settings against three models.
We published full sample articles, including the same brief written by Claude 3.7, GPT-4.5 Lite, and GPT-4.5 Pro, so you can compare voice and reasoning side by side. See the sample GPT-4.5 articles for the full comparison.
Both models are available now in beta. Try them in the app to see the difference for yourself.