OpenAI has introduced a new artificial intelligence model called GPT-5.4, which is now available in ChatGPT, the company’s API, and its coding tool Codex.

GPT-5.4 is also more reliable, producing 18% fewer errors and 33% fewer false claims than GPT-5.2, according to OpenAI.

OpenAI launches GPT-5.4, calling it its most capable and efficient AI model yet, with AI agents, computer control, improved reasoning, and a 1M-token context.

Postman 12 introduces YAML-based Collections, Agent Mode, and a central API catalog – geared towards agent-driven development.

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