Xiangqi

Standard Xiangqi, given as FEN. Pikafish scores every legal move by expected score; the answer is from and to squares. See Methodology.

Fewer puzzles than the other models, so results are noisy.

Quality is the mean oracle score of the moves played, × 100. The best move scores 100; an illegal move or no move scores 0. Protocol boardbench-0.2.

Quality vs cost

4 of 4 models
  • Anthropic
  • OpenAI
1020304050$0.001$0.01$0.1Claude Haiku 5.5 Medium · 0.0% · <$0.01 · Pareto frontierClaude Sonnet 5.5 Medium · 33.5% · $0.01 · Pareto frontierGPT-6 Luna high Medium · 14.4% · <$0.01 · Pareto frontierGPT-6.1 Sol Medium · 33.3% · $0.03Claude Sonnet 5.5 MediumGPT-6.1 Sol MediumGPT-6 Luna high MediumClaude Haiku 5.5 Medium
  • Pareto frontier: nothing plotted is both cheaper and better
  • Anthropic
  • OpenAI

Horizontal axis is logarithmic.

Table

ModelQualityLegalityCostn
Sonnet 5.5 (fewer samples)Medium33.5100.0$0.013
Sol (fewer samples)Medium33.3100.0$0.033
Luna highMedium14.488.9<$0.019
Haiku 5.5Medium0.0100.0<$0.019

Headline is the mean move score × 100. n is answers: puzzles × samples.

Look