GPT-5.1: OpenAI's New Flagship

GPT-5.1 is OpenAI's latest flagship model, and it's one of the most fully-featured options on Magicdoor. It supports everything: vision, web search, image generation, Canvas, reasoning mode, code interpreter, and PDF analysis.

Pricing

• Prompt tokens: $1.25 per million
• Completion tokens: $10.00 per million

In practice, a typical conversation costs a few cents. GPT-5.1 is actually cheaper per token than Claude 4.5 Sonnet ($3/$15), making it a solid choice when you need flagship capabilities without the premium price.

What It's Good For

Code interpreter support is the standout feature. If you need to analyze data, run calculations, or process files, GPT-5.1 can actually execute code rather than just talk about it. Upload a CSV and ask for visualizations - it'll generate them.

Canvas support means you can use it for collaborative document editing, iterating on drafts in real-time.

The 400,000 token context window is generous - enough for most codebases and long documents, though Gemini 3 Pro offers more if you need it.

When to Use GPT-5.1

Use GPT-5.1 when you need:

• Code execution (data analysis, file processing, calculations)
• Canvas collaboration for document work
• A balance of capability and cost

When to Use Something Else

• For writing quality: Claude 4.5 Sonnet often produces more polished prose
• For massive context: Gemini 3 Pro has a 1 million token window
• For everyday tasks: GPT-5 Mini is much cheaper and handles routine work well

Getting Started

Select GPT-5.1 from the model dropdown in any chat. Magicdoor will automatically use web search when needed, so you don't have to think about it.

If you're coming from ChatGPT, GPT-5.1 will feel familiar but with the added benefit of Magicdoor's usage-based pricing - you only pay for what you actually use.