All tags
Model: "claude-mythos"
not much happened today
claude-mythos opus-4.8 opus-4.7 gpt-5.5 gemini-3.1-pro gemini-3.5-flash claude-opus-4.7 anthropic sakana-ai meta-ai-fair princeton recursive-self-improvement benchmarking agent-evaluation long-horizon-tasks reliability reinforcement-learning sample-efficiency economically-meaningful-tasks agent-coherence anti-reward-hacking tooling rl-environments kimmonismus lechmazur teortaxestex hardmaru andrew_n_carr steverab pauliusztin_
Anthropic's Mythos/Opus cycle sparked mixed reactions with praise for Claude Mythos's one-shot workflows and concerns over Opus 4.8 benchmark regressions. Opus 4.7 showed strong chemistry task performance, "making Claude a chemist." Sakana AI launched an RSI Lab focusing on recursive self-improvement under compute constraints, marking RSI as a formal research program. New benchmarks like Agents' Last Exam (ALE) and SWE-Marathon test agents on long-horizon, economically meaningful tasks, revealing low pass rates and coherence challenges. Princeton's ICML 2026 paper found models like GPT 5.5, Gemini 3.1 Pro / 3.5 Flash, and Claude Opus 4.7 still lack meaningful reliability improvements. Tooling trends favor RL-environment-style frameworks for agent evaluation, exemplified by Meta's OpenEnv.
Anthropic @ $30B ARR, Project GlassWing and Claude Mythos Preview — first model too dangerous to release since GPT-2
claude-mythos anthropic openai model-training model-capabilities security-vulnerabilities strategic-thinking reward-hacking situational-awareness benchmarking model-restrictions nicolas_carlini sam_bowman
Anthropic strategically challenges OpenAI amid its upcoming IPO concerns by announcing a jump from $19B ARR in March to $30B ARR in April, highlighting a differential growth rate and higher cost efficiency. The company also revealed Claude Mythos, rumored as the largest successful training run, now restricted under Project Glasswing due to its dangerous capabilities. This model reportedly found thousands of high-severity vulnerabilities across major operating systems and browsers, showcasing unprecedented strategic thinking, situational awareness, and creative reward hacking. Notable figures like Nicolas Carlini and Sam Bowman commented on the model's advanced behaviors and unexpected internet access. Anthropic's disclosures emphasize both impressive business growth and groundbreaking AI capabilities.