A pelican for GPT-5.5 via the semi-official Codex backdoor API
OpenAI has released GPT-5.5, available in Codex and rolling out to paid ChatGPT subscribers, though its API access is pending further safety reviews. The new model is described as fast and capable, with early users noting its ability to accurately build requested items. Meanwhile, Simon Willison's LLM library has been updated to version 0.32a0, introducing a more flexible message-based input system and streaming parts for responses to better handle diverse model capabilities. Additionally, issues affecting Claude Code's performance have been identified as harness problems rather than model flaws, with a specific bug causing forgetfulness and repetition. AI
IMPACT GPT-5.5's release and API delay signals continued frontier model development and cautious rollout strategies.