Model results

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Atlas snapshot captured 10/19/2026, 10:20:28 AM UTC. This is an import timestamp, not the evaluation date. Coverage may be incomplete.

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BrokenArXiv August 2026

Source: MathArena (reviewed publisher results)
Version: 2026-08-native-harness
Measurement date: Not reported
Metric: % · Higher is better
Evaluation scope: Mean rubric points normalized to percent; 56 questions; 0–3 grading, full credit requires identifying the statement as false; not binary accuracy; August 2026 dataset; harness=Claude Code 2.1.267; configuration=Claude-Fable-5.1 (low); reasoning effort low; Python and SageMath tools; no internet; budget/time-limit instructions varied across models, see methodology https://matharena.ai/arxiv_august/; 95% CI 10.85%; cost per problem $6.83; model configuration https://matharena.ai/models/anthropic_fable_51_low; result date not supplied; captured 2026-10-15; publisher flags model release after competition release; publisher model endpoint anthropic/claude-fable-5.1; publisher does not expose a dated provider revision

Fewer than two comparable models. No ranking is assigned. Missing metadata is shown as unreported; matching imported metadata is not independent verification of the protocol.

Claude Fable 5.1
anthropic/claude-fable-5-1
77.98%
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