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Tweets by OpenAI

1. Introducing GPT-5.4 mini and nano

   GPT-5.4 mini and nano are smaller, faster versions of GPT-5.4 optimized for coding, tool use, multimodal reasoning, and high-volume API and sub-agent workloads.

2. Equipping workers with insights about compensation

   New research shows Americans send nearly 3 million daily messages to ChatGPT asking about compensation and earnings, helping close the wage information gap.

3. Why Codex Security Doesn’t Include a SAST Report

   A deep dive into why Codex Security doesn’t rely on traditional SAST, instead using AI-driven constraint reasoning and validation to find real vulnerabilities with fewer false positives.

4. Rakuten fixes issues twice as fast with Codex

   Rakuten uses Codex, the coding agent from OpenAI, to ship software faster and safer, reducing MTTR 50%, automating CI/CD reviews, and delivering full-stack builds in weeks.

5. Designing AI agents to resist prompt injection

   How ChatGPT defends against prompt injection and social engineering by constraining risky actions and protecting sensitive data in agent workflows.

6. From model to agent: Equipping the Responses API with a computer environment

   How OpenAI built an agent runtime using the Responses API, shell tool, and hosted containers to run secure, scalable agents with files, tools, and state.

7. Wayfair boosts catalog accuracy and support speed with OpenAI

   Wayfair uses OpenAI models to improve ecommerce support and product catalog accuracy, automating ticket triage and enhancing millions of product attributes at scale.

8. Improving instruction hierarchy in frontier LLMs

   IH-Challenge trains models to prioritize trusted instructions, improving instruction hierarchy, safety steerability, and resistance to prompt injection attacks.

9. New ways to learn math and science in ChatGPT

   ChatGPT introduces interactive visual explanations for math and science, helping students explore formulas, variables, and concepts in real time.

10. OpenAI to acquire Promptfoo

    OpenAI is acquiring Promptfoo, an AI security platform that helps enterprises identify and remediate vulnerabilities in AI systems during development.