Most coding agents burn 80% of their budget on decisions that were never hard.
Every step quietly asks the same four questions. Which notes to load. Which model to call. What to do after a failure. Which tests to run first.
Most setups send all four to the most expensive model, every single time.
None of them need that much thinking. They need rules.
So I moved all four out of the model and into code. Claude does the thinking. The code does everything else.
The bill dropped by 80%.
Full architecture is in the article
Use this prompt with Claude Opus 5.5 + Jev.
Build a 24/7 AI trading system from scratch — autonomous agents, trading strategies, and the entire infrastructure.
Steal this before everyone catches on:
@elonmusk This is the part that gets me. If Terafab actually pulls this off, the whole chip industry’s pace changes. Curious to see how fast they can scale it
Musk just said Grok Bot will route your requests to other companies’ models. Claude Opus 5.5, Midjourney and Suno are on the list.
Per Gizmodo’s report of his post, the bot picks “whatever is most likely to give you the best outcome.” Grok 4.7 is presumably an option too, but he didn’t say.
OpenAI’s Dots, by comparison, runs on one named model: GPT-6 Astra. You know which model is deciding.
Here is what I couldn’t find: any published way to see which model handled which action on your account. For an agent that now suggests work before you ask, that is the log you want first.
Routing to the best model is a good idea. Routing with no record of who decided is how you end up debugging a mistake nobody can trace.
Andrej Karpathy (ex-OpenAI, ex-Tesla) just released a prompt that turns Opus 5.5 into a harness that actually finishes the any job.
It's f*cking unreal...
Most people use Opus like a chatbot.
This makes it behave more like an autonomous worker:
→ plans the task
→ executes it
→ checks its own work
→ fixes what went wrong
→ keeps going until it's actually done
Paste this into Opus 5.5.
Then read the full Harness Engineering guide before everyone else catches on.