# Claude Opus 4.6Thinking · 65536 tokens

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Anthropic

Canonical URL: https://benchize.com/models/claude-opus-4-6-thinking-budget-65536
Last updated: Thu, 22 Oct 2026 04:30:12 GMT

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Anthropic

## Benchmarks

| Benchmark | Score | ± | Rank | Source |  |
| --- | --- | --- | --- | --- | --- |
| [FrontierMath Tier 4 (2025-07-01 private)](https://benchize.com/benchmarks/epoch-ai%3Afrontiermath_tier_4.md) | 20.83% | SE ±5.92 pp | 2 / 15 | [epoch ai · FrontierMath-Tier-4-2025-07-01-Private](https://epoch.ai/data/benchmark_data.zip#file=frontiermath_tier_4.csv) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.20833333333333334 \| score_fraction \| Best score (across scorers) \| Higher is better \| \| `mean_score` \| 0.20833333333333334 \| score_fraction \| mean_score \| Higher is better \| ### Configuration benchmarkVersion FrontierMath-Tier-4-2025-07-01-Private reasoningBudget 64K Reasoning effort Not reported sourceModelVersion claude-opus-4-6_64K ### Reported statistics Uncertainty Standard error: ±5.92 pp standardError 0.05923816975988693 ### Source [Original source](https://epoch.ai/data/benchmark_data.zip#file=frontiermath_tier_4.csv) Source epoch ai Original model label claude-opus-4-6 Source version FrontierMath-Tier-4-2025-07-01-Private Evaluated 2026-02-06T14:57:13.045Z Observed 2026-10-22T03:00:05.281Z Evidence SHA-256 `c928e5adccd6e0995d50ede183fb99728d6c5be01951434a3077429ffb5802b2` Source locator `/rows/23` |  |  |  |  |  |
| [FrontierMath (2025-02-28 private)](https://benchize.com/benchmarks/epoch-ai%3Afrontiermath.md) | 39.66% | SE ±2.88 pp | 3 / 18 | [epoch ai · FrontierMath-2025-02-28-Private](https://epoch.ai/data/benchmark_data.zip#file=frontiermath.csv) |  |
| ### Original source values \| Metric \| Value \| Unit \| Scope \| Direction \| \| --- \| --- \| --- \| --- \| --- \| \| `score` \| 0.39655172413793105 \| score_fraction \| Best score (across scorers) \| Higher is better \| \| `mean_score` \| 0.39655172413793105 \| score_fraction \| mean_score \| Higher is better \| ### Configuration benchmarkVersion FrontierMath-2025-02-28-Private reasoningBudget 64K Reasoning effort Not reported sourceModelVersion claude-opus-4-6_64K ### Reported statistics Uncertainty Standard error: ±2.88 pp standardError 0.028775377199008325 ### Source [Original source](https://epoch.ai/data/benchmark_data.zip#file=frontiermath.csv) Source epoch ai Original model label claude-opus-4-6 Source version FrontierMath-2025-02-28-Private Evaluated 2026-02-06T15:39:35.993Z Observed 2026-10-22T03:00:05.281Z Evidence SHA-256 `f5c92f0f0b9103abb02308fd428c0806e7c21b91e8a14d43edb8af77ce941598` Source locator `/rows/22` |  |  |  |  |  |
| [GPQA Diamond](https://benchize.com/benchmarks/gpqa-diamond.md) | 88.76% | SE ±1.94 pp | 35 / 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` \| 0.8876262626262627 \| score_fraction \| Best score (across scorers) \| Higher is better \| \| `mean_score` \| 0.8876262626262627 \| score_fraction \| mean_score \| Higher is better \| ### Configuration benchmarkVersion GPQA diamond reasoningBudget 64K Reasoning effort Not reported sourceModelVersion claude-opus-4-6_64K ### Reported statistics Uncertainty Standard error: ±1.94 pp standardError 0.019363218328924313 ### Source [Original source](https://epoch.ai/data/benchmark_data.zip#file=gpqa_diamond.csv) Source epoch ai Original model label claude-opus-4-6 Source version GPQA diamond Evaluated 2026-02-06T02:17:05.633Z Observed 2026-10-22T03:00:05.281Z Evidence SHA-256 `9ef0b938bdd8406b029d595983ee8ad3a80bd9d64b82605b91b5ce39ba650c39` Source locator `/rows/180` |  |  |  |  |  |
| [OTIS Mock AIME 2024–2025](https://benchize.com/benchmarks/epoch-ai%3Aotis_mock_aime_2024_2025.md) | 94.44% | SE ±2.82 pp | 35 / 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` \| 0.9444444444444444 \| score_fraction \| Best score (across scorers) \| Higher is better \| \| `mean_score` \| 0.9444444444444444 \| score_fraction \| mean_score \| Higher is better \| ### Configuration benchmarkVersion OTIS Mock AIME 2024-2025 reasoningBudget 64K Reasoning effort Not reported sourceModelVersion claude-opus-4-6_64K ### Reported statistics Uncertainty Standard error: ±2.82 pp standardError 0.028247294597471075 ### Source [Original source](https://epoch.ai/data/benchmark_data.zip#file=otis_mock_aime_2024_2025.csv) Source epoch ai Original model label claude-opus-4-6 Source version OTIS Mock AIME 2024-2025 Evaluated 2026-02-06T04:32:30.354Z Observed 2026-10-22T03:00:05.281Z Evidence SHA-256 `b7c9da8c0587c82f1e0d814ceb496c24308380b997a16203b6e5d39eb07f4f50` Source locator `/rows/186` |  |  |  |  |  |

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Cite as: Claude Opus 4.6Thinking · 65536 tokens — Benchize, https://benchize.com/models/claude-opus-4-6-thinking-budget-65536 (retrieved 2026-10-22)