The Harness Problem Is Real — And the Edit Tool Is Where It Starts
Dev.to AI
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Generative AI
AI Research
The debate is framed wrong. Every week someone publishes a benchmark comparing GPT-5.x vs Claude Opus vs Gemini on SWE-bench. The implicit assumption: the model is the variable that matters. Pick the best model, your coding agent works better. But a benchmark published last month broke that assumption cleanly. Grok Code Fast went from 6.7% to 68.3% on a real-world coding task - not because the model changed, not because of a new