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Show HN: Claude-thermos keeps your Claude session warm for you

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Re: Show HN: Claude-thermos keeps your Claude session warm for you

#51
post #33

Interested in how the critics of approaches like this defend an agentic session (with Fable, for example) that stops and runs a multi-hour ML training session. It's a script, so the actual LLM convo goes stale, but then when the results get returned to the main thread you get an expensive cache hit without doing anything. You would have avoided that cache hit if the LLM session was kept "alive" for those few hours. W…

I think you mean miss?

Re: Show HN: Claude-thermos keeps your Claude session warm for you

#52

Earlier quoted context omitted.

How do a few extra requests with the same prefix make it more expensive for everyone else?

The prefix cache is a resource shared by all users. This is basically a tragedy of the commons.

If true, I suspect Anthropic will begin suspending accounts that use it.

Re: Show HN: Claude-thermos keeps your Claude session warm for you

#53
Nice! Codex’s TTL on 5.6 is, I believe, 30 minutes, and when combined with how generous they are with resets of weekly limits and having completely gotten rid of 5hr limits, means Claude Code is just a total rip off right now. Not to mention their silent Fable nerfing and Chinese fearmongering.

Re: Show HN: Claude-thermos keeps your Claude session warm for you

#54
FYI, on Pro and Max plans caching lasts for one hour, not five minutes, unless you're currently using Extra Usage.

https://code.claude.com/docs/en/prompt-caching#on-a-claude-s...

(Thank you to EliasWatson for giving me this link just a few days ago, as I was previously confused too.)

Re: Show HN: Claude-thermos keeps your Claude session warm for you

#55

How will this not lead to tragedy of the commons?

Well, it's not a free lunch, you're still paying for the cache-warming request. Most of that request will be cached by definition, but cached requests merely cost less, they aren't free.

Re: Show HN: Claude-thermos keeps your Claude session warm for you

#57

Glad this exists. It will force anthropic to fix their flawed cache mechanism.

While Anthropic is far behind on caching and efficiency (made more dramatically apparent by how much cheaper it is to use GPT 5.6 Sol at API rates than even Opus 4.8, much less Fable), a bunch of people forcing their way to the front of the queue at the expense of everyone else isn't going to solve that.

They definitely aren't. Over 98% of my tokens over the last 6 month have been cache reads (did an analysis just a couple days ago), which has made my Pro plan highly valuable.

Re: Show HN: Claude-thermos keeps your Claude session warm for you

#58

This is just making it more expensive for everyone else, right? How Claude handles its sessions is none of my business. I'm going to let them do the best they can to provide good service for everyone, and if they can't/won't, I'll switch to a provider that can. Using these massive models is already pretty danged extravagant, I'm not going to demand to be at the front of the queue at all times, too.

You’re already paying for the subagent, why should you pay twice? (Once for subagent, and again for waiting for the subagent). That’s double billing.

Re: Show HN: Claude-thermos keeps your Claude session warm for you

#60

I thought the cache length was 1 hour, not 5 minutes?

it could be either. subscription defaults to 60 min with 2x cache writes. extra usage and api defaults to 5 min with 1.25 cache writes. You can override either with settings
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