# #243 - GPT 5.5, DeepSeek V4, AI safety sabotage

Page: https://stenobird.com/podcast/last-week-in-ai/243-gpt-5-5-deepseek-v4-ai-safety-sabotage
Text version: https://stenobird.com/podcast/last-week-in-ai/243-gpt-5-5-deepseek-v4-ai-safety-sabotage.md
Podcast: [Last Week in AI](https://stenobird.com/podcast/last-week-in-ai)
Published: 2026-05-03T07:30:00+00:00
Episode link: https://rss.art19.com/episodes/a8a95861-9763-4fe9-9282-61509b9f258c.mp3?rss_browser=BAhJIg90cmFuc2NyaWJyBjoGRVQ%3D--952c5701c84ad333c69d5faa668f8177091704f0
Audio file: https://rss.art19.com/episodes/a8a95861-9763-4fe9-9282-61509b9f258c.mp3?rss_browser=BAhJIg90cmFuc2NyaWJyBjoGRVQ%3D--952c5701c84ad333c69d5faa668f8177091704f0
Processing state: processed
JSON: https://stenobird.com/v1/public/podcasts/last-week-in-ai/episodes/243-gpt-5-5-deepseek-v4-ai-safety-sabotage
Duration seconds: 6742

## Resource

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, Meta’s AWS Gravitron deal and China blocking Meta’s Manus acquisition, a revamped OpenAI–Microsoft agreement, ongoing Musk–OpenAI trial developments, and new safety/security research on sabotage, document degradation under delegation, and bit-flip attacks. Timestamps: (00:00:10) Intro / Banter (00:02:00) News Preview (00:02:26) Response to listener comments (00:02:55) Sponsors Tools & Apps (00:05:55) OpenAI Unveils Its New, More Powerful GPT-5.5 Model - The New York Times (00:23:33) xAI Launches grok-voice-think-fast-1.0: Topping τ-voice Bench at 67.3%, Outperforming Gemini, GPT Realtime, an…

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