Best LLM for Reasoning in 2026
Models from the last 12 months, ranked by a composite of GPQA and AIME (2026 and 2025). These benchmarks test graduate-level science, competition mathematics, and multi-step logical reasoning.
Updated automatically as new models release. Full benchmark leaderboard →
What makes a good reasoning model?
Reasoning benchmarks test whether a model can solve multi-step problems requiring planning, logic and domain knowledge, not just pattern matching or retrieval.
- GPQA (Diamond): questions written by PhD-level experts in biology, chemistry and physics, designed so that non-experts who search for the answer still fail.
- AIME 2026: the American Invitational Math Exam, 2026 edition. 30 hard problems with integer answers. Its problems are recent, so they are less likely to be in training data.
- AIME 2025: the same format, one year earlier. Used alongside 2026 for a more stable picture of math reasoning capability.
Each score links to its source on the benchmarks leaderboard; scores from independent evaluators (Vals AI, Artificial Analysis) and from developers' own announcements are both used, and developers' figures are often higher.
Also see: Best Coding LLM, Best Cheap LLM, Compare any two models.