#244 - GPT-5.5 Instant, Grok 4.3, OpenAI vs Musk
Last Week in AI
May 11
#244 - GPT-5.5 Instant, Grok 4.3, OpenAI vs Musk
#244 - GPT-5.5 Instant, Grok 4.3, OpenAI vs Musk
Last Week in AI
May 11
Our 244th episode with a summary and discussion of last week's big AI news!
Recorded on 05/08/2026
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 Instant as ChatGPT’s new default model, showing large benchmark gains and crossing a “high” cyber-risk threshold under its preparedness framework, while bio-safety results were mixed.
- OpenAI investigated and patched ChatGPT’s “goblin” obsession, attributing it to reinforcement-learning rewards that over-amplified playful creature metaphors in a nerdy persona that later bled across versions.
- Major industry moves included xAI’s Grok 4.3 price cuts and voice tools, Mistral’s unified Medium 3.5 model and Work mode, and Anthropic’s managed-agent upgrades alongside a surprise SpaceX compute deal and reports of a much higher Anthropic valuation.
- Key policy and security developments covered the Musk–OpenAI trial details, Pentagon AI deployments on classified networks, expanded U.S. government pre-release model reviews, and reports of NSA testing Anthropic’s Mythos on Microsoft software.
Timestamps:
- (00:00:10) Intro / Banter
- (00:01:14) News Preview
- (00:04:39) Response to listener comments
- Tools & Apps
- (00:13:40)OpenAI releases GPT-5.5 Instant, a new default model for ChatGPT | TechCrunch
- (00:18:23)ChatGPT Became So Obsessed With Goblins That OpenAI Had to Intervene
- (00:27:14)xAI launches Grok 4.3 at an aggressively low price and a new, fast, powerful voice cloning suite | VentureBeat
- (00:33:49)Mistral's new flagship Medium 3.5 folds chat, reasoning, and code into one model
- (00:39:28)Anthropic updates Claude Managed Agents with three new features - 9to5Mac
- (00:43:42)ElevenLabs Revamps AI Music Platform as Fan-Focused Service
- Applications & Business
- (00:44:57)A diary, a threat, and a $30 billion stake: What the Musk vs OpenAI trial has actually shown in its first week - The Times of India
- (00:55:28)Anthropic, SpaceX Sign Deal to Boost AI Computing Power for Claude Software - Bloomberg
- (01:01:48)Anthropic in talks with investors to raise funds at $900 billion valuation, higher than OpenAI
- (01:02:37)Anthropic and OpenAI are both launching joint ventures for enterprise AI services | TechCrunch
- (01:06:15)Anthropic and FIS Are Building an AI Agent to Help Banks Police Financial Crimes
- (01:07:02)AMD’s revenue jumps 38 percent from last year as Q1 data center sales hit $5.8 billion. | The Verge
- (01:08:51)Banks seek to offload risk to avoid ‘choking’ on data centre debt
- (01:14:08)DeepSeek could be valued at up to $50 billion in first fundraising, sources say | Reuters
- Projects & Open Source
- (01:16:14)Natural Language Autoencoders Produce Unsupervised Explanations of LLM Activations
- (01:22:23)OpenAI just open-sourced its data center networking technology
- Policy & Safety
- (01:25:02)Pentagon inks deals with Nvidia, Microsoft, and AWS to deploy AI on classified networks | TechCrunch
- (01:27:27)Google, Microsoft, and xAI will allow the US government to review their new AI models | The Verge
- (01:32:11)NSA Testing Anthropic’s Mythos to Find Flaws in Microsoft Tech
- (01:35:42)Introspection Adapters: Training LLMs to Report Their Learned Behaviors
- Research & Advancements
- (01:41:18)Recursive Multi-Agent Systems
- (01:51:47)Frontier Coding Agents Can Now Implement an AlphaZero Self-Play Machine Learning Pipeline For Connect Four That Performs Comparably to an External Solver
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