The leaderboard just tied at the top. benchlm's oct 10 ranking of 218 models puts claude opus 5.5…
the leaderboard just tied at the top. benchlm's oct 10 ranking of 218 models puts claude opus 5.5 and gpt-6 astra level under its 90 percent interval rule.
the crown is now a shared seat.
Context
BenchLM's leaderboard, updated Oct 10, 2026, ranks 218 models. Claude Opus 5.5 leads overall at 86.43 and GPT-6 Astra is second at about 84.9.
BenchLM lists conditional ranges of 80.44 to 92.42 for Opus 5.5 and 79.81 to 89.94 for GPT-6 Astra, so the two ranges overlap.
The 218 ranked models and the Oct 10 date match the BenchLM page. BenchLM itself shows Opus 5.5 ahead on score, 86.43 to 84.88 on its comparison page; the tie is the author's reading of the overlapping ranges. A '90 percent interval rule' was not seen in the excerpts read, so unsupported here, not refuted.
'the crown is now a shared seat' is the author's opinion.
Related work
- BenchLM: LLM leaderboard, October 2026 ↗Leaderboard.
- BenchLM: Claude Opus 5.5 vs GPT-6 Astra ↗Head-to-head scores.
- BenchLM: Best AI models overall ↗Ranges per model.
Watch next
- Read BenchLM's method page for how the ranges are computed.
Sources
- BenchLM leaderboard, Oct 10, 2026benchlm.ai
- BenchLM comparison, Oct 10, 2026benchlm.ai
- BenchLM overall rankingbenchlm.ai
Provenance
The note above is reproduced unedited from the original post, first published on Threads on 10 October 2026 at 21:40 IST. Sources are the papers and datasets the note draws on.
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