According to DeepLearning.AI on X, OpenAI released GPT-5.4 Thinking and GPT-5.4 Pro, featuring larger context windows and improved tool use that set new highs on coding and agentic task benchmarks, and the models power OpenAI’s improved Codex agent while rivaling Google’s Gemini 3.1 Pro Preview at the top end of capability. As reported by DeepLearning.AI, the enhanced tool use suggests stronger reliability for multi-step reasoning with external APIs and databases, improving enterprise workflows such as code generation, code review, and autonomous software refactoring. According to DeepLearning.AI, the larger context windows enable longer documents and multi-file repositories to be processed in a single pass, which reduces prompt engineering overhead and accelerates agent-based development lifecycles. As noted by DeepLearning.AI, positioning against Gemini 3.1 Pro Preview indicates intensified competition in high-end agentic automation, opening business opportunities in developer productivity platforms, RAG-heavy knowledge management, and complex orchestration for customer support and IT operations.