ULTRABENCH Created by Iternal Technologies, the AI Strategy Experts

LLM leaderboard

The 25 highest-ranked models by intelligence index.

  1. GPT-6 Astra · intelligence index 93.7 · $20.00 per 1M tokens blended · 1.1M context
  2. Claude Opus 5.5 · intelligence index 92.5 · $8.00 per 1M tokens blended · 1M context
  3. Claude Fable 5.1 · intelligence index 91.5 · $20.00 per 1M tokens blended · 1M context
  4. Claude Fable 5 · intelligence index 91.1 · $20.00 per 1M tokens blended · 1M context
  5. Claude Opus 5 · intelligence index 90.3 · $10.00 per 1M tokens blended · 1M context
  6. Claude Sonnet 5.5 · intelligence index 90.1 · $4.00 per 1M tokens blended · 1M context
  7. GPT-5.6 Sol · intelligence index 89.9 · $8.00 per 1M tokens blended · 1.1M context
  8. Gemini 3.8 Flash · intelligence index 89.2 · $1.65 per 1M tokens blended · 1M context
  9. Fugu Ultra · intelligence index 88.0 · $11.25 per 1M tokens blended · 1M context
  10. GPT-6.1 Sol · intelligence index 88.0 · $4.00 per 1M tokens blended · 1.1M context
  11. GPT-6 Sol Pro · intelligence index 87.5 · $4.00 per 1M tokens blended · 1.1M context
  12. Muse Spark 1.3 Contributor · intelligence index 87.1 · $0.125 per 1M tokens blended · 1M context
  13. Muse Spark 1.3 · intelligence index 87.0 · $2.00 per 1M tokens blended · 1M context
  14. GPT-6 Sol · intelligence index 86.3 · $4.00 per 1M tokens blended · 1.1M context
  15. Claude Opus 4.8 · intelligence index 85.5 · $10.00 per 1M tokens blended · 1M context
  16. Gemini 3.1 Pro · intelligence index 85.0 · $4.50 per 1M tokens blended · 1M context
  17. GPT-5.5 · intelligence index 84.7 · $11.25 per 1M tokens blended · 1.1M context
  18. Kimi K3 · intelligence index 84.3 · $3.16 per 1M tokens blended · 1M context
  19. GPT-5.6 Terra · intelligence index 84.2 · $4.50 per 1M tokens blended · 1.1M context
  20. GPT-5.4 Pro · intelligence index 84.1 · $67.50 per 1M tokens blended · 1.1M context
  21. Grok 4.6 · intelligence index 83.7 · $3.00 per 1M tokens blended · 500K context
  22. Qwen3.5 Plus 2026-04-20 · intelligence index 83.6 · $0.585 per 1M tokens blended · 1M context
  23. GPT-5.5 Pro · intelligence index 83.5 · $67.50 per 1M tokens blended · 1.1M context
  24. Muse Spark 1.2 · intelligence index 83.0 · $2.00 per 1M tokens blended · 1M context
  25. GLM 5.3 · intelligence index 83.0 · $0.4093 per 1M tokens blended · 1M context