Changelog

New updates and improvements to LangFast.

January 28, 2026

Pro Mode

December 13, 2025

OpenAI GPT-5.2 models

OpenAI GPT-5.2 models

December 9, 2025

Responses API support

Responses API support

November 10, 2025

Multimodality support

Multimodality support

October 28, 2025

Prompt versioning and run history

Prompt versioning and run history

October 7, 2025

Async prompt runs

Async prompt runs

Ship prompts that pass the tests

Don't wait until they break in production

Get started – it's free

© 2026 LangFast. All rights reserved. Privacy Policy. Terms of Service.