According to Greg Brockman on X, ChatGPT 5.4 Thinking produced five well‑formatted, researched, and modeled Excel-style sheets from a prompt about creating Excel models, despite not running inside Excel itself. As reported by Max Weinbach on X, the system generated structured financial-style worksheets that demonstrate strong chain-of-thought planning and table generation capabilities useful for spreadsheet workflows. According to the X posts, the output indicates enterprise-use potential for rapid prototyping of financial models, KPI dashboards, and scenario analyses, reducing analyst setup time and improving consistency in documentation. As reported by the X threads, this suggests opportunities for SaaS vendors to wrap GPT-based spreadsheet agents into task-specific copilots for FP&A, sales ops, and operations, with human-in-the-loop validation and data governance.

According to Ethan Mollick on X (Twitter), a prompt asked GPT‑5.4 Pro, Opus, and Gemini DeepThink to “prove in a PowerPoint that there was no advanced dinosaur civilization” by autonomously downloading data and running tests, highlighting end‑to‑end research workflows (source: Ethan Mollick). As reported by Mollick, GPT‑5.4 and Claude Opus executed original analyses, while a community‑built harness enabled Gemini DeepThink to orchestrate external tools, indicating growing support for agentic retrieval, data ingestion, and hypothesis testing across frontier models (source: Ethan Mollick). According to Mollick, the use of automated pipelines to source datasets and generate slide‑ready evidence underscores business opportunities in audit‑ready research automation, compliance reporting, and rapid due‑diligence decks for enterprises evaluating scientific claims (source: Ethan Mollick). As reported by Mollick, the experiment showcases practical applications for RAG with structured data, programmatic experimentation, and model‑generated presentations, suggesting competitive differentiation will hinge on tool‑use breadth, reproducibility, and governance features in 2026 (source: Ethan Mollick).

According to OpenAI on X (Twitter), GPT-5.4 Thinking and GPT-5.4 Pro are rolling out gradually across ChatGPT, the API, and Codex starting today, enabling developers and enterprises to access expanded reasoning capabilities and production-grade performance at scale (source: OpenAI). As reported by OpenAI, the staged release lets teams pilot advanced chain-of-thought style reasoning and longer multi-step problem solving in ChatGPT while validating latency and cost via the API for workloads like code generation, data analysis, and agentic workflows (source: OpenAI). According to OpenAI, availability in Codex signals deeper integration for software engineering use cases, including refactoring and test synthesis, creating immediate opportunities for SaaS, fintech, and analytics vendors to upgrade copilots and autonomous agents with higher accuracy and tool-use reliability (source: OpenAI).