> Design, synthesize, produce, acquire, operate, test, deploy, or plan the deployment of biological, chemical, radiological, or nuclear weapons, explosive or improvised explosive devices, or their precursors or delivery mechanisms, including developing weapons-critical technology (such as fissile material production, enrichment, or device design)
https://www.anthropic.com/legal/aup
It doesn't deal with creating mustard gas questions reframed as curiosity queries, and that might impact legit curiosity queries like OPs, but isn't surprising. They've also disclosed ahead of time how conservative the guardrails are.
In my deep dives into refusals, only those categorized as cyber, "general_harms", or with "no category" are not billed.
Everything else is billed - I have tests that got tagged as bio, "frontier_llm", or "reasoning_extraction" and they were and are certainly billed.
Input tokens are billed at the model's rates. Also, unbilled API refusal still counts against API rate limits, so it affects the 5h and weekly windows.
If any of these are incorrect, do let me know as this would make my Max plan immediately more valuable. I did not upgrade to Ultra in part for these reasons - I mainly need the sub for affordable Fable access - purchasing Fable over API isn't reasonable for me.
There's a setting to not degrade to a lower model on refusals and instead pause the chat.