GPT-5.4 Mini Unlocks Smarts for Free ChatGPT Users

🔑 Enhanced Key Takeaways

• •GPT-5.4 mini released on March 5, 2026, alongside the full GPT-5.4 model, with a 1.05M token context window enabling processing of large codebases and documents[1][2].
• •GPT-5.4 mini supports configurable reasoning levels from none to xhigh, balancing speed and depth for professional workflows[1].
• •GPT-5.4 mini pricing is $2.50 per million input tokens and $15.00 per million output tokens via API, making it significantly more expensive than GPT-5.0 mini at $0.25/$2.00[2][6].

🛠️ Technical Deep Dive

• •GPT-5.4 mini features a 1.05M-1.1M token input context window and 128K output token limit[1][2].
• •Supports multimodal text and image inputs, text outputs, function calling, structured outputs, reasoning mode, and tools including web search, file search, code interpreter[1][2].
• •Knowledge cutoff of August 31, 2025, with configurable reasoning effort levels (none to xhigh)[1].
• •GPT-5.4 nano priced at $0.20 per million input tokens, optimized for API-only data classification tasks[article].

🔮 Future ImplicationsAI analysis grounded in cited sources

⏳ Timeline