GPT-5.4 Test: Impressive Yet Off-Target

🔑 Enhanced Key Takeaways

• •GPT-5.4 Thinking achieves state-of-the-art 75.0% success on OSWorld-Verified benchmark for desktop navigation via screenshots and keyboard/mouse actions, surpassing human performance at 72.4%[3].
• •On GDPval benchmark, GPT-5.4 matches or exceeds industry professionals in 83% of knowledge work tasks across 44 occupations, up from 70.9% for GPT-5.2[2].
• •GPT-5.4 introduces native computer-use capabilities in Codex and API, enabling agents to operate software, navigate file systems, and execute multi-step workflows[1][2][3].

🛠️ Technical Deep Dive

• •Supports 1-million-token context window for handling longer workflows and complex prompts while maintaining coherence[2][5][7].
• •Introduces 'tool search' in API, allowing efficient operation across larger tool ecosystems with lower token cost and latency[1][3].
• •Improved tool calling accuracy on Toolathlon benchmark, enabling better multi-step tasks like reading emails, extracting attachments, grading, and spreadsheet updates[3].
• •Native computer use via screenshots, mouse/keyboard commands, and libraries like Playwright; steerable behavior with custom safety policies[3].

🔮 Future ImplicationsAI analysis grounded in cited sources

⏳ Timeline