Developers gain major speed and cost savings with new GPT-5.1 update

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ZDNET's key takeaways

• GPT-5.1 speeds up coding with adaptive and no-reasoning modes.
• New prompt caching cuts API costs for embedded app developers.
• New tools make AI agents more capable inside modern IDEs.

OpenAI is back with a new 5.1 update to its previous GPT-5 large language model. GPT-5 was introduced in August, which is decades ago in AI's time warp-speed version of our universe.

OpenAI is, of course, using AI to help it code faster. After all, it's in a race with the other big players to get that trajillion-dollar valuation. Besides, it's been proven beyond a shadow of a doubt that AI coding, in the hands of a professional coder, is an almost magical force multiplier and project accelerator.

(Disclosure: Ziff Davis, ZDNET's parent company, filed an April ...