OpenAI just explained why its models started obsessing over goblin and gremlin metaphors starting with GPT-5.1. A post-mortem traced the verbal tic to reward training for ChatGPT's "Nerdy" personality, which favored creature words and accidentally leaked into the broader model via RL feedback loops. OpenAI retired the persona in March and cleaned its training data.
Perplexity just added OpenAI's brand-new GPT-5.1 to its search engine for Pro and Max subscribers. Paid users get immediate access to both GPT-5.1 Instant for rapid daily chats and GPT-5.1 Thinking for heavy reasoning. Perplexity's CEO also teased that Moonshot AI's Kimi K2 is coming soon.
Microsoft just rolled out GPT-5.1 as an experimental model in Copilot Studio for U.S. customers in early-release Power Platform environments. The new model offers adaptable thinking time across chat and reasoning tasks, though Microsoft recommends keeping it out of production for now.
OpenAI just rolled out GPT-5.1, upgrading both its Instant and Thinking models with warmer conversational tones and smarter pacing. Instant now adapts its thinking time based on question difficulty, while new granular tone presets let users shape ChatGPT's personality. Paid users get access first, with API availability arriving later this week.
