Amazon partners with OpenAI to let users of Amazon's DSP run ads in ChatGPT in a pilot program limited to the US; ChatGPT Ads hit $1B in ARR last month45m ago D-Matrix Connects Raptor XPUs to NVIDIA AI Factories via NVLink Fusion1h ago Source: Meta AI researcher Andrew Tulloch, who came over from Thinking Machine Lab as one of the highest paid employees last year, is leaving the company (Reed Albergotti/Semafor)56m ago Mother Horrified When Instagram’s AI Scours Social Media for Invasive Information About Her Young Daughters1h ago Mach Industries, which makes unmanned military vehicles and weapons, raised $600M in an extension to its $300M Series C, doubling its valuation to $3.7B1h ago Salesforce Unveils Six-Capability Trusted AI Harness for Enterprises1h ago US closes $1.9bn loan to restart the Iowa nuclear plant powering Google1h ago OpenAI Gives US Agencies 50% Off Models, Ending $1 Per Year Deal1h ago 47,000 job listings reveal the engineering roles that AI is creating1h ago Anthropic's Alignment Science lead says there is a ">10%" chance AI could kill all humans within the next decade and is worried about recursive self-improvement (Evan Hubinger/@evanhub)1h ago Ukraine says AI is moving beyond drones and into strike missiles for the first time1h ago Meta Announces Muse AI Agent for Personal Tasks and Organization1h ago Celero raises $275m to bring coherent optics inside AI data centres1h ago Exclusive: Cfo.ai launches an agentic CFO for business founders1h ago

Amazon partners with OpenAI to let users of Amazon's DSP run ads in ChatGPT in a pilot program limited to the US; ChatGPT Ads hit $1B in ARR last month45m ago D-Matrix Connects Raptor XPUs to NVIDIA AI Factories via NVLink Fusion1h ago Source: Meta AI researcher Andrew Tulloch, who came over from Thinking Machine Lab as one of the highest paid employees last year, is leaving the company (Reed Albergotti/Semafor)56m ago Mother Horrified When Instagram’s AI Scours Social Media for Invasive Information About Her Young Daughters1h ago Mach Industries, which makes unmanned military vehicles and weapons, raised $600M in an extension to its $300M Series C, doubling its valuation to $3.7B1h ago Salesforce Unveils Six-Capability Trusted AI Harness for Enterprises1h ago US closes $1.9bn loan to restart the Iowa nuclear plant powering Google1h ago OpenAI Gives US Agencies 50% Off Models, Ending $1 Per Year Deal1h ago 47,000 job listings reveal the engineering roles that AI is creating1h ago Anthropic's Alignment Science lead says there is a ">10%" chance AI could kill all humans within the next decade and is worried about recursive self-improvement (Evan Hubinger/@evanhub)1h ago Ukraine says AI is moving beyond drones and into strike missiles for the first time1h ago Meta Announces Muse AI Agent for Personal Tasks and Organization1h ago Celero raises $275m to bring coherent optics inside AI data centres1h ago Exclusive: Cfo.ai launches an agentic CFO for business founders1h ago

AI Research Machine Learning22 min reading time

Claude Fable 5.1 and Mythos 5.1: The System Card

Don't Worry About the VasePublished 6 days ago

Anthropic released Claude Fable 5.1 and Mythos 5.1, advanced AI models with improved safety, alignment, and capabilities. Fable 5.1 is seen as a leading model for frontier intelligence tasks, with ongoing comparisons to GPT-6-Astra. The models include detailed system cards covering risk, safeguards, alignment, and honesty assessments.

More on this story

LWiAI Podcast #256 - Fable 5.1, Astra Tease, Gemini 3.8 Flash
1d· Last Week in AI
Fable 5.1
7d· Ben’s Bites
Claude Fable 5.1 now available on AI Gateway
10d· 16 sources

#ai-safety #anthropic #claude-fable-5-1 #gpt-6-astra #model-alignment #mythos-5-1

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