Ali Asif

The AI log, by topic

Mythos: what I’ve logged

Mythos comes up in 2 posts of my AI log, from April 2026 to August 2026, and each item below links to the primary source. The sources come from Anthropic, filed under frontier, open weights and science.

Items that mention Mythos

  1. Anthropic 31 Aug 2026

    Claude Fable 5.1 and Claude Mythos 5.1

    One underlying model at two safeguard levels, with cache reads 75% cheaper and base prices unchanged at $10 in and $50 out per million tokens.

    Primary source

  2. Anthropic 6 Apr 2026

    Project Glasswing and Claude Mythos Preview

    A frontier model held back from general release and given to defenders first, backed by up to $100M in usage credits and $4M for open-source security groups.

    Primary source

Posts that cover Mythos

August 20261 entry

  1. Week of 31 Aug 2026Claude Fable 5.1 and GPT-6 Astra both land, plus Gemini 3.8 FlashFrontier · Open weights · Science · Agents and coding

April 20261 entry

  1. Week of 6 Apr 2026Anthropic gates Mythos Preview, Meta's Muse Spark, GLM-5.1Frontier · Open weights · Agents and coding