AI Writing Tools Benchmark 2026: Quality, Speed, and Cost Tested on 50 Prompts
We benchmarked 8 AI writing tools on 50 real prompts across 5 content types. Measured writing quality (human-rated), generation speed, and cost per 1,000 words. Claude Sonnet 4 scored highest on quality (9/10). Ivern's multi-agent approach scored best on depth and research accuracy. Full results with specific output examples.
AI WritingAI writing quality comparisonbest AI writing tool qualityAI writer speed benchmark
Ivern AI Team14 min read