Code Supernova is shutting down. Here's what to use instead (blog.kilocode.ai)

Code Supernova — the second-most used model on Kilo Code — has been removed, and benchmarks show you don’t need it. Using a standard Bun + TypeScript + SQLite job-queue prompt, xAI’s Grok Code Fast 1 (free on Kilo) matched or exceeded Code Supernova in clarity and API design: Grok’s implementation was more compact (103 vs. 118 lines), separated job type from payload (addJob(type, data, delay)), accepted millisecond delays directly, and returned parsed JSON on retrieval (avoiding manual parsing). Supernova tended to bundle type into payloads and required Date/Unix conversions for scheduling, which added complexity and potential bugs. More importantly, a hybrid workflow — GPT-5 Mini for Architect/planning and Grok Code Fast 1 for Code/implementation — produced markedly better results than either model alone. GPT-5 Mini produced a concrete architecture (Queue and Worker classes, retry strategy, DB indexes, migration scaffolding, error handling, and worker lifecycle/polling) and Grok implemented it precisely. This combo is also extremely cheap: GPT-5 Mini’s per-call cost (with caching) can be under $0.01 per run, and Grok is free, making a robust, affordable pipeline for larger features. Practical takeaway: use Grok Code Fast 1 for quick, focused edits; use GPT-5 Mini + Grok for new systems or architectural work to get cleaner, production-ready code at low cost.