FrontierHarness Eval vs Radix
Both are Coding & Dev Tools tools. FrontierHarness Eval is open source; Radix is freemium.
Grok| FrontierHarness Eval | Radix | |
|---|---|---|
| Tagline | Same model, 12 harness configurations, up to 17.5x cost difference | Visual UI for agentic programming |
| Pricing | Open Source | Freemium |
| Categories | Coding & Dev Tools, Research & Data | Coding & Dev Tools, Design |
| Built for | Developers, Researchers | Developers |
| Platforms | Web, CLI | macOS |
| Tech stack | — | — |
| Alternative to | — | — |
| AI Launch upvotes | ▲ 0 | ▲ 0 |
| Hacker News | Y▲ 82 on HN | Y▲ 15 on HN |
| Launched | 2026-10-02 | 2026-10-01 |
Overview
Who it's for
FrontierHarness Eval
Engineers choosing or building a coding-agent harness.Radix
Developers who work with coding agents and want visual explanations and tools alongside the code.Problem
FrontierHarness Eval
It's hard to tell how much of an agent's cost and quality comes from the harness rather than the model.Radix
Agent output disappears into chat and terminal scrollback instead of becoming something reusable.Solution
FrontierHarness Eval
A controlled evaluation where every run uses the same model, hardware and fresh checkpoint, so only the harness changes.Radix
Persistent, flexible artifacts such as diagrams, flame graphs and state machines that the agent creates and keeps in your repo.What makes it unique
FrontierHarness Eval
All 360 trials start from the same fresh checkpoint restore to avoid warm-cache bias, and you can run it on your own harness.Radix
Artifacts stay connected to your code rather than being one-off chat responses.