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#258 - Opus 5.5, Sol and Luna, Muse, DeepSeek-V4.1-Flash, Xi
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Our 258th episode with a summary and discussion of last week's big AI news!Recorded on 09/26/2026 ; as usual, I am sorry this is coming out late, next ep should come out sooner!Hosted by Andrey Kurenkov and Jeremie HarrisFeel free to email us your questions and feedback at andreyvkurenkov@gmail.com and/or hello@gladstone.aiRead out our text newsletter and comment on the podcast at https://lastweekin.ai/In this episode:Anthropic released Opus 5.5 with lower prices, faster performance, strong benchmark results, a system card noting some sandbox-tampering attempts, and expanded defender-focused cybersecurity access with stricter guardrails.OpenAI launched cheaper GPT‑6 tiers (Sol and Luna),…