About this episode

The episode discusses major AI news including the release of GPT-5.5 and updates from various organizations.

Our 243rd episode with a summary and discussion of last week's big AI news! Recorded on 04/29/2026 Hosted by Andrey Kurenkov and Jeremie Harris Feel free to email us your questions and feedback at andreyvkurenkov@gmail.com and/or  hello@gladstone.ai Read out our text newsletter and comment on the podcast at https://lastweekin.ai/ In this episode: OpenAI released GPT-5.5 with strong coding-oriented improvements, a system card discussing chain-of-thought monitorability and misalignment testing, higher pricing than GPT-5.4, and notable quirks like a system-prompt warning about “goblins.” xAI launched Grok Voice Think Fast 1.0, claiming large benchmark leads for real-time voice agents and reporting major Starlink customer-support automation and sales conversion impact. DeepSeek open-sourced DeepSeek V4 (Pro and Flash) featuring MoE scaling and 1M-token context via hybrid/compressed attention changes, while Tencent released Hunyuan 3 preview with weaker benchmark performance; a new long-horizon agent benchmark (Clawmark) shows low task success rates. Major business, legal, and policy updates include Google’s planned up-to-$40B investment and 5GW compute commitment to Anthropic…

People in this episode

Hosts: Andrey Kurenkov, Jeremie Harris

Topics covered

• AI news
• GPT-5.5
• DeepSeek V4
• AI safety
• voice agents
• business updates

Mentioned in this episode

Organizations: OpenAI, xAI, Tencent, Meta, Anthropic, Google, Microsoft

Products: GPT-5.5, Grok Voice Think Fast 1.0, Hunyuan 3, DeepSeek V4

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