Inference
Vals AI

Time Horizon Index: KSP

Can an AI agent build and run a space program in Kerbal Space Program?

ModelsModels with a result.10
Top resultBest result on this test.90.5%GPT-6 Astra
Top-3 spreadPoints from first to third.66.7 pts
UpdatedDate the source changed the results.14 Sept 2026

Result and cost

020406080100$100$300$1000$3000$10000RESULTUS DOLLARS PER TASK · LOG SCALE

Results

10 results
#ModelResultThe score from the source.CostUS dollars to run one task.TimeTime to run one task.
01GPT-6 Astra90.5%$4,206.590.0 s
02Claude Fable 5.163.3%$4,655.010.0 s
03GPT-5.6 Sol23.8%$2,027.20.0 s
04Claude Opus 518.8%$1,348.770.0 s
04Gemini 3.8 Flash18.8%$543.140.0 s
06Claude Opus 4.811.8%$1,499.320.0 s
07GPT-5.58.3%$516.360.0 s
08Grok 4.56.3%$344.040.0 s
09Grok 4.65.8%$225.120.0 s
10Muse Spark 1.11.7%$144.920.0 s