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GPT-5.4 Launches with Transparent Thinking Mode, Million-Token Context and Native Computer Control
OpenAI officially launched the GPT-5.4 series on March 5, 2026. This iteration marks a significant leap forward, achieving a profound fusion of reasoning, programming, and agent workflow capabilities.
Within the ChatGPT web interface and mobile app, the new Thinking (Reasoning) mode introduces a transformative way to interact:
Thinking Path Preview: Before delivering a final answer, the AI first outlines its "reasoning plan." Users can watch in real-time as it maps out its approach to problem-solving and can intervene to adjust its direction at any point during the process.
Enhanced Deep Search: For highly specialized and complex inquiries, the Thinking mode features more robust multi-turn web search abilities. It can cross-reference sources and synthesize high-quality answers with the discernment of a human expert.
The Productivity Engine: Codex Heritage Meets Professional Optimization
GPT-5.4 fully integrates the elite programming prowess of GPT-5.3-Codex, establishing itself as OpenAI's premier "mainstream reasoning model."
Office Suite Integration: It has been specifically fine-tuned for productivity scenarios like spreadsheets (Excel), presentations (PPT), and document processing, dramatically reducing logical errors during content generation.
Low Error Rate & High Factual Accuracy: Data indicates GPT-5.4's factual error rate is 18% lower than GPT-5.2's, with false statements down by 33%. Its performance in specialized fields such as finance and legal analysis now rivals that of human professionals.
The Agent Leap: Native "Computer Control" and Million-Token Context
GPT-5.4 evolves beyond a simple chat interface, gaining genuine native computer operation abilities:
Multi-Application Execution: The model can directly execute actions like clicking, dragging, and typing by interpreting screenshots and instructions within virtual environments or local software, enabling complex cross-application workflows.
Million-Token Context: It supports an ultra-long context window of up to 1 million tokens (1M Tokens). This allows an agent to "read" an entire large codebase or several quarters of financial reports in one go, then plan and verify long-term tasks that span hours or even days.
Versions and Pricing
This release also introduced the GPT-5.4Pro tier, designed primarily for intensive professional developers and enterprise clients:
Pro Version Exclusives: Supports higher reasoning intensity settings (Reasoning Effort: High/X-High), targeting exceptionally demanding tasks in scientific research or architectural design.
Availability
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OpenAI officially launched the GPT-5.4 series on March 5, 2026. This iteration marks a significant leap forward, achieving a profound fusion of reasoning, programming, and agent workflow capabilities.
Within the ChatGPT web interface and mobile app, the new Thinking (Reasoning) mode introduces a transformative way to interact:
Thinking Path Preview: Before delivering a final answer, the AI first outlines its "reasoning plan." Users can watch in real-time as it maps out its approach to problem-solving and can intervene to adjust its direction at any point during the process.
Enhanced Deep Search: For highly specialized and complex inquiries, the Thinking mode features more robust multi-turn web search abilities. It can cross-reference sources and synthesize high-quality answers with the discernment of a human expert.
The Productivity Engine: Codex Heritage Meets Professional Optimization
GPT-5.4 fully integrates the elite programming prowess of GPT-5.3-Codex, establishing itself as OpenAI's premier "mainstream reasoning model."
Office Suite Integration: It has been specifically fine-tuned for productivity scenarios like spreadsheets (Excel), presentations (PPT), and document processing, dramatically reducing logical errors during content generation.
Low Error Rate & High Factual Accuracy: Data indicates GPT-5.4's factual error rate is 18% lower than GPT-5.2's, with false statements down by 33%. Its performance in specialized fields such as finance and legal analysis now rivals that of human professionals.
The Agent Leap: Native "Computer Control" and Million-Token Context
GPT-5.4 evolves beyond a simple chat interface, gaining genuine native computer operation abilities:
Multi-Application Execution: The model can directly execute actions like clicking, dragging, and typing by interpreting screenshots and instructions within virtual environments or local software, enabling complex cross-application workflows.
Million-Token Context: It supports an ultra-long context window of up to 1 million tokens (1M Tokens). This allows an agent to "read" an entire large codebase or several quarters of financial reports in one go, then plan and verify long-term tasks that span hours or even days.
Versions and Pricing
This release also introduced the GPT-5.4Pro tier, designed primarily for intensive professional developers and enterprise clients:
Pro Version Exclusives: Supports higher reasoning intensity settings (Reasoning Effort: High/X-High), targeting exceptionally demanding tasks in scientific research or architectural design.
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