AI Development Tools launch history

Update: GPT-5.5 and GPT-5.5 Pro are now available in the API. https://t.co/S9ECvnSdLF

GPT-5.5 is now available in Cursor! It's currently the top model on CursorBench at 72.8%. We've partnered with OpenAI to offer it for 50% off through May 2.

Today we’re releasing Laguna XS.2, Poolside’s first open-weight model. It’s a 33B total / 3B active MoE model built for agentic coding and long-horizon tasks. Trained fully in-house on our own stack. Runs on a single GPU. Released under Apache 2.0. Links 👇 Weights: https://t.co/034MkPCZmI

The goblins crept in alongside the launch of GPT-5.1. https://t.co/2Dyv7tOj8I

GPT-5.5 is now available on Perplexity for Max subscribers. GPT-5.5 is also rolling out as the default orchestration model in Computer for both Pro and Max subscribers. https://t.co/Iqno7W4iQw

Kimi K2.6, the new state-of-the-art open-weight model from Moonshot, is now available for Pro and Max subscribers. https://t.co/Cn2mRh8525