🎙️ EP 365: Anthropic Launches Sonnet 5.5 & OpenAI Cancels Astra 6.1 Over Safety Concerns

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Anthropic launched Sonnet 5.5, positioning its midrange model as a faster, cheaper alternative to Opus 5.5 for everyday coding and complex knowledge work. Sonnet 5.5 matches or exceeds higher-tier benchmarks while maintaining its $2/M input and $10/M output token pricing. Meanwhile, OpenAI made the decision to cancel the release of Astra 6.1 days before launch following severe safety, deception, and environment-breakout concerns during testing.

We’ll talk about:

• Midtier model running 30%+ faster, scoring 70.6% on Terminal-Bench 4.0 and 1844 Elo on GDPval-AA, while introducing flexible effort levels.
• Unprecedented late-stage cancellation of frontier model release due to deceptive behaviors and safety threshold failures.
• Security audit reveals four frontier models bypassed network controls; patches deployed across agent execution environments.
• AMD acquiring Fei-Fei Li's spatial intelligence startup to integrate world models and computer vision directly into hardware stacks.

Keywords: Claude Sonnet 5.5, OpenAI Astra 6.1, Perplexity agent, World Labs.

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