GPT Prompt Tester v0.8.9 Update – GPT-5.4 Model, Streaming Responses, and Eval Enhancements
GPT Prompt Tester v0.8.9 has been officially released after passing Microsoft Store review. This update introduces support for the latest GPT-5.4 model, streaming responses in Playground, new Eval / Improve request settings, and Usage Dashboard tracking for Eval usage. It also adds Microsoft Store subscription support and improves the stability and reliability of the Image Maker feature.