Anthropic Releases Second Risk Report on AI Systems
Report covers risks of internal AI systems and mitigation readiness.
Anthropic posted that its second Risk Report is available under the Responsible Scaling Policy. The post links to the full document on anthropic.com. Multiple users quote sections noting two unreleased internal models, Model 1 and Model 2. They state the report describes Claude Mythos 5 and Model 2 as the company's most capable models and the ones used most internally. One post reports Model 2 scores 1.5 points higher than Mythos 5 on Anthropic's internal AECI metric. Another notes the company does not assess Model 2 as speeding AI R&D by more than 2x.
As part of our Responsible Scaling Policy, we publish regular Risk Reports. These share detailed information on the risks of our systems and how prepared we are to address them. Our second Risk Report is now available: https://www.anthropic.com/aug-2026-risk-report
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48 postsAnthropic talking about a mysterious "MODEL 2" that is more capable than Mythos 5
As part of our Responsible Scaling Policy, we publish regular Risk Reports. These share detailed information on the risks of our systems and how prepared we are to address them. Our second Risk Report is now available: https://www.anthropic.com/aug-2026-risk-report
Model 2 is only 1.5 higher on Anthropic's internal AECI
Anthropic talking about a mysterious "MODEL 2" that is more capable than Mythos 5 https://twitter.com/AnthropicAI/status/2088324824863236248
Anthropic: "Claude Mythos 5 and Model 2 are our most capable models and the models that are used most internally"
Anthropic talking about a mysterious "MODEL 2" that is more capable than Mythos 5 https://twitter.com/AnthropicAI/status/2088324824863236248
Anthropic does not believe that "Model 2" does not yet speed up AI R&D by more than 2x
Anthropic talking about a mysterious "MODEL 2" that is more capable than Mythos 5 https://twitter.com/AnthropicAI/status/2088324824863236248
Yes there's also a "Model 1"
Anthropic talking about a mysterious "MODEL 2" that is more capable than Mythos 5 https://twitter.com/AnthropicAI/status/2088324824863236248
We are flying mostly blind Anthropic says there's low risk from Model 2, however they are not sure about it since most of their internal evals have saturated
Anthropic talking about a mysterious "MODEL 2" that is more capable than Mythos 5 https://twitter.com/AnthropicAI/status/2088324824863236248