# Claude 2.1

> Source: Benchize (https://benchize.com) — https://benchize.com/models/claude-2-1. When citing or reusing this content, credit "Benchize" and link to https://benchize.com/models/claude-2-1.

Anthropic

Canonical URL: https://benchize.com/models/claude-2-1
Last updated: Thu, 22 Oct 2026 08:20:15 GMT

Reproduction and quotation must name Benchize, link to the canonical HTML URL, and retain individual source citations.

Anthropic

## Benchmarks

| Benchmark | Score | ± | Rank | Source |  |
| --- | --- | --- | --- | --- | --- |
| [OTIS Mock AIME 2024–2025](https://benchize.com/benchmarks/epoch-ai%3Aotis_mock_aime_2024_2025.md) | 1.94% | SE ±1.05 pp | 123 / 124 | [epoch ai · OTIS Mock AIME 2024-2025](https://epoch.ai/data/benchmark_data.zip#file=otis_mock_aime_2024_2025.csv) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.019444444444444445 \| score_fraction \| Best score (across scorers) \| Higher is better \| \| `mean_score` \| 0.019444444444444445 \| score_fraction \| mean_score \| Higher is better \| ### Configuration benchmarkVersion OTIS Mock AIME 2024-2025 reasoningBudget Not reported Reasoning effort Not reported sourceModelVersion claude-2.1 ### Reported statistics Uncertainty Standard error: ±1.05 pp standardError 0.010477515876628662 ### Source [Original source](https://epoch.ai/data/benchmark_data.zip#file=otis_mock_aime_2024_2025.csv) Source epoch ai Original model label claude-2.1 Source version OTIS Mock AIME 2024-2025 Evaluated 2025-03-07T22:18:53.415Z Observed 2026-10-22T03:00:05.281Z Evidence SHA-256 `b7c9da8c0587c82f1e0d814ceb496c24308380b997a16203b6e5d39eb07f4f50` Source locator `/rows/260` |  |  |  |  |  |
| [EQ-Bench v2](https://benchize.com/benchmarks/eq-bench%3Aeqbench-v2.md) | 73.96% | — | 12 / 18 | [eq bench · eqbench-v2](https://eqbench.com/eqbench-v2.js) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 73.96 \| percent \| overall \| Higher is better \| ### Configuration interactiveAdjustments none protocol eqbench-v2 sourceModelVersion claude-2.1 ### Source [Original source](https://eqbench.com/eqbench-v2.js) Source eq bench Original model label claude-2.1 Source version eqbench-v2 Observed 2026-10-22T05:10:05.138Z Evidence SHA-256 `088fe07c18b4347c82113934c58bb801cdb21adfe80852c7d0854e9818749dcd` Source locator `/leaderboardDataEqbench/84` |  |  |  |  |  |
| [GPQA Diamond](https://benchize.com/benchmarks/gpqa-diamond.md) | 32.95% | SE ±2.32 pp | 125 / 126 | [epoch ai · GPQA diamond](https://epoch.ai/data/benchmark_data.zip#file=gpqa_diamond.csv) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.32954545454545453 \| score_fraction \| Best score (across scorers) \| Higher is better \| \| `mean_score` \| 0.32954545454545453 \| score_fraction \| mean_score \| Higher is better \| ### Configuration benchmarkVersion GPQA diamond reasoningBudget Not reported Reasoning effort Not reported sourceModelVersion claude-2.1 ### Reported statistics Uncertainty Standard error: ±2.32 pp standardError 0.02324885083265289 ### Source [Original source](https://epoch.ai/data/benchmark_data.zip#file=gpqa_diamond.csv) Source epoch ai Original model label claude-2.1 Source version GPQA diamond Evaluated 2025-01-27T00:00:00.000Z Observed 2026-10-22T03:00:05.281Z Evidence SHA-256 `9ef0b938bdd8406b029d595983ee8ad3a80bd9d64b82605b91b5ce39ba650c39` Source locator `/rows/277` |  |  |  |  |  |

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Cite as: Claude 2.1 — Benchize, https://benchize.com/models/claude-2-1 (retrieved 2026-10-22)