09/02/2026
Posted today on Nadlan Social (Premium) — AI news group.
Anthropic Drops Claude Fable 5.1 and Mythos 5.1 — Watch Your Sessions Too
Today’s Nadlan Social AI roundup:
• Anthropic released Claude Fable 5.1 and Claude Mythos 5.1 as its top models for coding and knowledge work. The company says they share one underlying model with different safeguards. Fable is in Claude, Claude Code, and the API. Mythos stays limited to vetted organizations, especially cybersecurity and life sciences.
• Claimed bench jumps in the launch notes: Terminal-Bench-Science 24.7% → 52.6%, AutomationBench 17.1% → 31.4%, CursorBench 3.2 at 73.4%. Cache-read pricing cut 75% to $0.25 per million tokens (about 25% on typical loads, up to about 45% on heavy agentic workloads).
• Anthropic warned some Claude users that infostealer malware stole login and session material. Stolen sessions can keep working even when password and 2FA look fine. Anthropic says it closed affected sessions, removed saved payment methods, and refunded unauthorized charges. Treat browser session cookies like keys.
• Early tests tied to OpenAI’s Astra leaked online: interactive worlds, games, and 3D scenes from a single prompt. Astra is widely treated as a GPT-6 candidate; OpenAI has not confirmed the name or a launch date.
• Deutsche Bank ranked Israel second among 30 major economies for economic exposure to AI.
• OpenClaw 2.0 (open-source AI agent) and VoiceStudio (free local voice suite) also shipped.
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