THE SCARIEST BUG IN YOUR LLM APP DOESN’T THROW AN ERROR
no crash. no alert. no failed build
just a confident, wrong answer
deepeval catches it
→ scores hallucination and faithfulness
→ pytest-style tests for rag and agents
→ fails the build when quality drops
A few weeks ago I built a 3D drone simulator with a mystery model called Space Bunny.
Today I found out who it was.
Space Bunny = MiniMax M3.1 Flash 🐰
The stealth version was already topping OpenRouter and OpenCode. The official release is stronger, so I had to run it back.
Same drone sim, but way more ambitious this time.
I asked for a full city:
skyscrapers, traffic, tower cranes, birds, rain, fog, a day/night cycle, rings to fly through, real flight physics, and a proper game HUD.
I used MiniMax Code and mostly just watched.
It planned the files
Wrote the code
Ran it, hit errors, fixed them
Then I said "make it more cinematic" and it reworked the lighting without breaking the game
That's the part that got me. It kept going through a long, messy, multi-step build without losing the plot.
Then I checked the bill.
64.6M tokens for the whole session.
97.5% cache hits.
About $2 total.
Without caching, the same run would've cost me around $10.
For reference:
$0.15 / 1M input
$0.60 / 1M output
$0.015 / 1M cached
So this isn't just "cheap model, okay results."
It's a real build for less than a coffee ☕
If you want to try it:
→ unlimited M3.1 Flash in MiniMax Code until Oct 25
→ 50% off your first month of M Plan until Oct 31
Weights drop Oct 23 👀
Wait, you can use Claude Code with 1.3B+ free tokens every month...? 👀🔥
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