Explainers · Rivermark
Rivermark: how the agent harness benchmark for social media and print graphics is structured
On October 29, 2026, Reddit described the homemade agent harness Rivermark and a benchmark of 112 requests for social and print graphics. We break down the mechanics of the test, the three classes of input data, and why in the comparison of Claude Code + Sonnet 5.5 with DeepSeek and GLM Flash there is not a single number yet.
30 Oct 2026
6 min read
