Auto-Arch Tournament vs free-claude-code

Auto-Arch Tournament is an autonomous research system where an AI agent iteratively proposes, implements, and validates microarchitectural improvements to a RISC-V CPU. Starting from a standard 5-stage pipeline, the loop runs hypotheses in parallel, each going through formal verification (53 symbolic checks), cycle-accurate simulation, multi-seed FPGA place-and-route, and CoreMark CRC validation. Only hypotheses that beat the current champion get merged; everything else gets discarded. Starting from 301 iterations/second, the system hit 577 iter/s (+92%) across 73 attempts in 9.8 hours — producing a design 26% faster and 40% smaller in LUTs than the baseline. The insight the author drives home is that the real innovation isn't the AI agent — it's the verifier. The orchestrator is hardcoded to prevent agents from manipulating their own evaluation gates, a simple but critical design constraint that turns a creative process into a trustworthy one. Without a rigorous verification harness, agent-driven optimization becomes a confidence trick. This is early but fascinating proof that AI-driven hardware design loops can produce commercially meaningful gains. The repo uses Claude Code or Codex as the coding agent, SystemVerilog for the RTL, and standard open-source EDA tooling (Yosys, nextpnr, Verilator). It's a compelling template for anyone building agentic optimization loops where correctness matters.

free-claude-code is a lightweight proxy that intercepts Claude Code's Anthropic Messages API calls and reroutes them to six alternative backends: NVIDIA NIM, OpenRouter, DeepSeek, LM Studio, llama.cpp, and Ollama. From Claude Code's perspective nothing changes — the UX, tool calls, streaming, and reasoning blocks all work identically. Under the hood, you're spending almost nothing. The project supports per-model routing, so you can send Opus traffic to OpenRouter while Haiku goes to a local Ollama instance. It handles the full protocol stack: streaming completions, multi-turn tool use, thinking block pass-through, and request optimization for local hardware. An optional Discord or Telegram bot wrapper lets you trigger remote coding sessions from your phone. With 17K+ GitHub stars and still climbing, this is clearly scratching a real itch. The Anthropic gating of Claude Code behind Pro subscriptions created exactly the market condition this project was built for. Whether it stays ahead of API changes is the open question — but right now it's the fastest path to a near-free Claude Code experience.