Some backstory helps. Anthropic tightened third-party tool access to Claude Max subscriptions earlier this spring. Developers paying $100-200/month for premium AI coding started shopping. DeepSeek's API was already cheap. Reasonix just made it comfortable.
The architectural bet is deliberate and narrow. Tools like OpenRouter abstract across hundreds of models. Reasonix goes the other direction: one provider, one set of API behaviors to optimize against. That 99.82% cache hit rate comes from knowing exactly how DeepSeek handles token caching and building every interaction around it. Obsessive specificity as a cost strategy.
The developer community is split on whether this amounts to a real product or a polished wrapper around something you could rig up yourself with OpenCode pointed at DeepSeek. Fair question. But the v0.50.0 release shipping KaTeX rendering and session restore suggests someone's building for keeps.
One quiet detail: Reasonix reads .claude/skills/ configurations. All those carefully tuned instruction files developers built for Claude? Portable now. Switching costs just dropped.
The pricing landscape is looking increasingly bimodal. Premium tools at $100+/month with tightening platform control. Single-digit-dollar tools built tight against a cheap API. How long the middle holds is anybody's guess. When a Sunday project can process hundreds of millions of tokens for the price of a sandwich, you start wondering what exactly $100/month is buying you.