Best Proprietary LLMs in 2026
As of November 13, 2026, the top model among proprietary LLMs on the BenchLM leaderboard is Claude Fable 5.2 with a score of 93.7.
Bottom line: the live table above sets the proprietary order. Near the top, choice often comes down to pricing, latency, access, and API ecosystem, so check each row's evidence label and price before treating the rank as a decision.
Full Rankings (121 ranked)
Key Takeaways
The top model is Claude Fable 5.2 by Anthropic with a BenchAlign v5.8 score of 93.7 and Estimated evidence.
121 models are included in this ranking.
Score in Context
What these scores mean
Models are ranked by the same overall BenchLM score used across all leaderboards. Comparing within proprietary's lineup helps identify which model fits your use case and budget.
Known limitations
This page only shows proprietary models. Cross-provider comparison requires the overall or category-specific leaderboards. Newer models may have limited benchmark coverage initially.
About this ranking
Ranking data as of November 13, 2026
Top proprietary/closed-source AI models ranked by benchmark performance.
Unless noted otherwise, ranking surfaces on this page use BenchLM’s provisional leaderboard lane rather than the stricter sourced-only verified leaderboard.
Claude Fable 5.2 leads this ranking with a score of 93.7, followed by Gemini 4 Carbon (89.2) and Claude Opus 5.5 (86.6). There is meaningful separation between the top models, suggesting genuine performance differences.
All models in this ranking are proprietary. No open-weight alternatives are available for this category.
This ranking uses provisional overall weighted scores from the active scoring formula. For detailed model profiles, click any model name above. To compare two specific models head-to-head, use the "vs #" links.
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Know when it’s worth switching models
The model to choose, the cheaper alternative, and the release we would wait on.
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