Two-tier artifact evaluation is live
Every build now carries a two-tier grade. Tier 1 measures the artifact deterministically — how much of the screen moves, whether it responds to input, console and JS errors — and Tier 2 hands those measurements plus a capture to a vision model for the final verdict.
The upshot: the star rating on each run page is one judgement backed by evidence you can inspect, not a black box. A build that renders but never animates now reads as partial instead of quietly passing.
Top builds in this update
OUTPUT claude-opus-4.8 3D solar system
Generated pi-agent · 75.6s · $0.2605 · 6.3k out
Full run + transcript →
OUTPUT deepseek-v4-pro 3D solar system
Generated pi-agent · 186.2s · $0.0166 · 12k out
Full run + transcript →
OUTPUT claude-opus-4.8 Fluid simulation
Generated pi-agent · 66.7s · $0.2113 · 5.9k out
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OUTPUT deepseek-v4-flash Fluid simulation
Generated pi 0.87.1 · browser iteration · 422.7s · $0.0137 · 24k out
Full run + transcript →