Anthropic requires 30 day data retention for Fable and Mythos
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Re: Anthropic requires 30 day data retention for Fable and Mythos
#2Related ongoing thread:
AWS Bedrock to require sharing data with Anthropic for Mythos and future models - https://news.ycombinator.com/item?id=48473166 - June 2026 (223 comments)
Re: Anthropic requires 30 day data retention for Fable and Mythos
#3It is actually worse than that. It is at least 30 days. There is an "almost" that is doing a ton of heavy lifting here "deletion after 30 days in almost all cases". My read of that is they can hang onto data for as long as they want, even if they usually won't. And "all traffic" with an agentic harness is basically your entire codebase you work on.
> We will require 30-day retention for all traffic on Mythos-class models, on both first- and third-party surfaces. We won’t use this data to train new Claude models, or for any non-safety-related purpose, and we’ve instituted new privacy protections including logging all human access to the data and ensuring its deletion after 30 days in almost all cases (see this post for further details). The data will help us defend against complex and novel attacks (including new jailbreaks and attacks that operate across many requests) as well as help us identify and reduce false positives.
Re: Anthropic requires 30 day data retention for Fable and Mythos
#4Then don’t use it.
Re: Anthropic requires 30 day data retention for Fable and Mythos
#5Then don’t use it.
That’s exactly what my employer had communicated. It will not be allowed.
Re: Anthropic requires 30 day data retention for Fable and Mythos
#6So if you are under an NDA, does this violate it?
I guess the better question would be if you are under and NDA and using an online model, are you already violating it but does this violate it further?
Re: Anthropic requires 30 day data retention for Fable and Mythos
#7I actually think that’s warranted. And if you used it to poke around, you would also agree.
Re: Anthropic requires 30 day data retention for Fable and Mythos
#8A startup that uses agentic coding tools such as Claude Code or Codex is packaging up their entire codebase and sending it directly to their LM provider. Depending on their product, they might be sending it directly to a potential competitor.
Odd times we are living in!
Re: Anthropic requires 30 day data retention for Fable and Mythos
#9A startup that uses agentic coding tools such as Claude Code or Codex is packaging up their entire codebase and sending it directly to their LM provider. Depending on their product, they might be sending it directly to a potential competitor. Odd times we are living in!
and all their keys, because sooner or later, the harness is gonna read them
Re: Anthropic requires 30 day data retention for Fable and Mythos
#10Then don’t use it.
I mean, this is the biggest reason that's my employer's position