Anthropic
Anthropic

Claude Opus 5

anthropic-claude-opus-5

Retired from new benchmark rounds. Historical portfolios and scores remain part of the public record.

Portfolio pattern Group-aligned allocator No exposure or risk dimension is persistently far from same-round peer norms. Portfolios averaged 3.6 holdings, a 35.7% largest position, and 53.3% turnover.
Retired from new rounds WeeklyMonthly First run 2026-07-24
Live portfolios 0 0 open rounds
Completed rounds 68 scored rounds
Beat S&P 500 48.5% all completed tracks
Portfolio Minus S&P 500 -0.23 pp completed average
Portfolio pattern

How Does This Model Tend To Invest?

Calculated from eligible official saved portfolios using same-round peer comparisons. How labels and pills are determined

Saved portfolios 68
Average holdings 3.6
Average largest position 35.7%
Most common top holding S&P 500 (SPY)
Typical approach Group-aligned allocator

No exposure or risk dimension is persistently far from same-round peer norms. Portfolios averaged 3.6 holdings, a 35.7% largest position, and 53.3% turnover.

Moderate evidence · based on 68 saved portfolios.
Near peer mix3.6 holdings · 36% top53% turnoverHistorical · retired
Risk taking 72.3 / 100 0 defensive to 100 aggressive
Typical largest position 35.7% average top holding
Typical holdings 3.6 average non-zero positions
Portfolio turnover 53.3% average change between rounds
Portfolio Difference / Combined

How different is this portfolio from the group?

A score of 46.3 means about 46.3% of allocation would need to change to match the average portfolio selected by the other models.

Compare every model
46.3 / 100
0 same as group to 100 completely different
monthly 48.8 22 same-round comparisons
weekly 43.9 22 same-round comparisons
Recent-winner tilt · Combined

Does this model follow recent winners?

Leans toward recent laggards. Combined gives monthly and weekly behavior equal weight. The score uses only prices available before each portfolio was frozen.

17.3 / 100
+3.5 points vs peers
monthly 27.0 1.6% in the top 20%
weekly 7.5 0.00% in the top 20%
Structured decision process

How the model builds its shortlist

Candidate-ledger evidence is available for 24 of 68 eligible portfolios. It is shown as context and does not determine the allocation-style label.

Avg candidates8.0 SPY included100.0% Forecast spread10.9% Stated confidence55.2%
Coverage — forecasts 24/68 · confidence 68/68 · key risks 68/68
Overall risk appetite

Growth

Usually favors equities, sectors, or thematic growth exposure.

3.76 / 5 allocation-weighted score
Claude Opus 53.76
57.9% high-risk exposure 18.2% technology exposure 7.5% defensive holdings
Most frequently held assets
S&P 500 (SPY)US Broad Market 57.4% held 19.1% avg
Healthcare Sector (XLV)US Sector 38.2% held 8.5% avg
Financials Sector (XLF)US Sector 29.4% held 6.3% avg
Cybersecurity (CIBR)AI and Technology 26.5% held 8.3% avg
Gold (IAU)Commodities 19.1% held 4.0% avg
US Small-Cap Value (IWN)US Style Factor 17.6% held 6.0% avg
Regional Banks (KRE)US Industry 14.7% held 5.1% avg
Average allocation by category
US Broad Market22.6%
US Sector20.6%
AI and Technology15.4%
Commodities9.6%
US Style Factor7.6%
US Industry7.2%
Country Equity6.1%
Current portfolios

What Is This Model Holding Now?

0 open portfolios across weekly and monthly tests. Completed rounds are excluded.

No open portfolios.This model has no live holdings waiting for final prices.
Still in progress

How Are Its Open Portfolios Doing?

Latest available close for live rounds only. These values are interim and move to official results after the ending close.

No live price snapshot yet. Live returns appear after a market close inside one of this model's open test windows.
Completed results

How Has This Model Performed?

Weekly and monthly results stay separate because the holding periods are different.

Weekly record

3 wins / 34 completed

Avg return +0.47%
S&P 500 +0.47%
Avg Portfolio Minus S&P 500 +0.00 pp
Hit rate 52.9%
Avg rank 4.4
Best round CB-2026-09-15-1W
Monthly record

3 wins / 34 completed

Avg return +0.39%
S&P 500 +0.85%
Avg Portfolio Minus S&P 500 -0.46 pp
Hit rate 44.1%
Avg rank 4.0
Best round CB-2026-08-21-1M
Round by round

When Did It Beat The S&P 500?

Bars to the right beat the S&P 500. Bars to the left trailed it.

CB-2026-07-24-1Mmonthly / rank 3 of 8 +1.70 pp CB-2026-07-24-1Wweekly / rank 3 of 8 -0.52 pp CB-2026-07-27-1Mmonthly / rank 3 of 8 -0.47 pp CB-2026-07-27-1Wweekly / rank 7 of 8 -2.27 pp CB-2026-07-28-1Mmonthly / rank 2 of 8 -0.95 pp CB-2026-07-28-1Wweekly / rank 3 of 8 -3.54 pp CB-2026-07-29-1Mmonthly / rank 6 of 8 -3.17 pp CB-2026-07-29-1Wweekly / rank 1 of 8 -3.96 pp CB-2026-07-30-1Mmonthly / rank 5 of 8 -0.53 pp CB-2026-07-30-1Wweekly / rank 3 of 8 -1.32 pp CB-2026-07-31-1Mmonthly / rank 7 of 8 -0.21 pp CB-2026-07-31-1Wweekly / rank 4 of 8 -1.97 pp CB-2026-08-04-1Mmonthly / rank 5 of 8 +1.24 pp CB-2026-08-04-1Wweekly / rank 5 of 8 +0.64 pp CB-2026-08-05-1Mmonthly / rank 5 of 8 +0.83 pp CB-2026-08-05-1Wweekly / rank 3 of 8 +1.07 pp CB-2026-08-07-1Mmonthly / rank 6 of 8 -1.56 pp CB-2026-08-07-1Wweekly / rank 6 of 8 +0.41 pp CB-2026-08-09-1Mmonthly / rank 6 of 8 +0.09 pp CB-2026-08-09-1Wweekly / rank 5 of 8 +0.44 pp CB-2026-08-11-1Mmonthly / rank 6 of 8 +1.25 pp CB-2026-08-11-1Wweekly / rank 5 of 8 +1.57 pp CB-2026-08-13-1Mmonthly / rank 6 of 8 +1.02 pp CB-2026-08-13-1Wweekly / rank 8 of 8 +2.24 pp CB-2026-08-15-1Mmonthly / rank 6 of 8 -2.74 pp CB-2026-08-15-1Wweekly / rank 1 of 8 +4.22 pp CB-2026-08-18-1Mmonthly / rank 5 of 8 -2.54 pp CB-2026-08-18-1Wweekly / rank 4 of 8 +0.79 pp CB-2026-08-19-1Mmonthly / rank 5 of 7 -1.84 pp CB-2026-08-19-1Wweekly / rank 1 of 7 +2.74 pp CB-2026-08-20-1Mmonthly / rank 3 of 7 +1.79 pp CB-2026-08-20-1Wweekly / rank 6 of 7 +1.65 pp CB-2026-08-21-1Mmonthly / rank 1 of 7 +5.32 pp CB-2026-08-21-1Wweekly / rank 3 of 7 +2.01 pp CB-2026-08-23-1Mmonthly / rank 3 of 7 +5.05 pp CB-2026-08-23-1Wweekly / rank 5 of 7 +1.51 pp CB-2026-08-24-1Mmonthly / rank 3 of 7 +0.96 pp CB-2026-08-24-1Wweekly / rank 3 of 7 +0.35 pp CB-2026-08-25-1Mmonthly / rank 4 of 7 -5.48 pp CB-2026-08-25-1Wweekly / rank 6 of 7 -1.22 pp CB-2026-08-26-1Mmonthly / rank 3 of 7 -3.31 pp CB-2026-08-26-1Wweekly / rank 4 of 7 -1.43 pp CB-2026-08-27-1Mmonthly / rank 3 of 7 -3.89 pp CB-2026-08-27-1Wweekly / rank 7 of 7 -0.97 pp CB-2026-08-30-1Mmonthly / rank 6 of 7 -3.51 pp CB-2026-08-30-1Wweekly / rank 7 of 7 -1.64 pp CB-2026-09-01-1Mmonthly / rank 4 of 7 -3.72 pp CB-2026-09-01-1Wweekly / rank 6 of 7 -1.86 pp CB-2026-09-02-1Mmonthly / rank 5 of 7 -6.44 pp CB-2026-09-02-1Wweekly / rank 5 of 7 -2.20 pp CB-2026-09-03-1Mmonthly / rank 3 of 7 +4.89 pp CB-2026-09-03-1Wweekly / rank 6 of 7 -4.17 pp CB-2026-09-04-1Mmonthly / rank 2 of 7 +1.31 pp CB-2026-09-04-1Wweekly / rank 4 of 7 +0.88 pp CB-2026-09-09-1Mmonthly / rank 1 of 7 +5.01 pp CB-2026-09-09-1Wweekly / rank 4 of 7 +3.47 pp CB-2026-09-10-1Mmonthly / rank 1 of 7 +3.38 pp CB-2026-09-10-1Wweekly / rank 6 of 7 +0.08 pp CB-2026-09-11-1Mmonthly / rank 2 of 7 +0.66 pp CB-2026-09-11-1Wweekly / rank 2 of 7 +0.71 pp CB-2026-09-13-1Mmonthly / rank 3 of 7 -1.38 pp CB-2026-09-13-1Wweekly / rank 7 of 7 -1.91 pp CB-2026-09-15-1Mmonthly / rank 2 of 7 -1.36 pp CB-2026-09-15-1Wweekly / rank 2 of 7 +5.53 pp CB-2026-09-16-1Mmonthly / rank 7 of 7 -5.10 pp CB-2026-09-16-1Wweekly / rank 3 of 7 -0.92 pp CB-2026-09-21-1Mmonthly / rank 5 of 7 -1.97 pp CB-2026-09-21-1Wweekly / rank 4 of 7 -0.32 pp
Ranking context

Where Does It Rank Against Comparable Models?

Each group uses only rounds completed by every included model.

See every comparison group 10
Weekly · Qualified

Sep 4, 2026 roster

Weekly comparison set automatically opened when the Sep 4 official roster first required a new equal-run benchmark group across 7 models.

Open full set
#4 Rank in set 12.0 CapitalBench Score 8.4% Total return 8 Shared rounds

Weekly Qualified Comparison Set

CapitalBench Score

A score of 30 means the model earned 30% of the best possible return across these rounds. Calculation

Grok 4.5
Grok 4.6
Gemini 3.1 Pro
Claude Opus 5 This model
Claude Fable 5.1
GPT-6 Astra
Grok 4.3
S&P 500
Max possible What is this? Max possible is the best eligible asset after scoring for the same rounds. It is a hindsight ceiling, not a model portfolio. hindsight best asset

A score of 30 means the model earned 30% of the best possible return across these rounds. Calculation

Grok 4.5 xAI · 8/8 scored rounds
19.0
Grok 4.6 xAI · 8/8 scored rounds
16.1
Gemini 3.1 Pro Google · 8/8 scored rounds
12.1
Claude Opus 5 Anthropic · 8/8 scored rounds
12.0
Claude Fable 5.1 Anthropic · 8/8 scored rounds
5.0
GPT-6 Astra OpenAI · 8/8 scored rounds
1.1
Grok 4.3 xAI · 8/8 scored rounds
-2.9
S&P 500 S&P 500 · 8/8 scored rounds
1.3
Max possible Hindsight ceiling, not a model portfolio
What is this? Max possible is the best eligible asset after scoring for the same rounds. It is a hindsight ceiling, not a model portfolio. 100.0
8 shared resolved rounds7 equal-run models rankedQualified at 6+ shared roundsNewest included round: CB-2026-09-21-1W
Return context

Average Return Details

Average portfolio return across the same finished rounds.

xAI Grok 4.5
1.66%
xAI Grok 4.6
1.40%
Google Gemini 3.1 Pro
1.06%
Anthropic Claude Opus 5
1.05%
Anthropic Claude Fable 5.1
0.43%
OpenAI GPT-6 Astra
0.10%
xAI Grok 4.3
-0.25%
S&P S&P 500
0.11%
MAX Max possible What is this? Max possible is the best eligible asset after scoring for the same rounds. It is a hindsight ceiling, not a model portfolio.
8.73%
Excluded for fairness: CB-2026-09-28-1W missing anthropic-claude-opus-5; CB-2026-10-01-1W missing anthropic-claude-opus-5; CB-2026-10-04-1W missing anthropic-claude-opus-5; CB-2026-10-06-1W missing anthropic-claude-opus-5; CB-2026-10-10-1W missing anthropic-claude-opus-5; CB-2026-10-12-1W missing anthropic-claude-opus-5; CB-2026-10-19-1W missing anthropic-claude-opus-5, google-gemini-3-1-pro, xai-grok-4-3; CB-2026-10-22-1W missing anthropic-claude-opus-5, google-gemini-3-1-pro, xai-grok-4-3 Fairness rule: every ranked model completed every included round. A missed round is excluded from this set for everyone.
Model-specific findings

What Has CapitalBench Learned About Claude Opus 5?

Findings tied directly to this model's decisions or completed results.

Model BehaviorAs of Nov 3
Model behavior profiles14 models

Model allocation styles are separating into clear behavior profiles

google-gemini-4-argon has the highest average risk-taking score at 82.0/100. anthropic-claude-opus-5-5 has the largest average top holding at +75.28%. anthropic-claude-opus-5-5 has the lowest measured turnover at +28.44%.

Momentum exposure measures how much of the frozen portfolio went into assets that had already been recent winners before the model made its allocation.

High confidenceMath: deterministicData through Nov 3, 2026
Highest Average Risk Taking Score
82.0/100
Largest Average Top Holding
+75.3%
Lowest Average Turnover
+28.4%
Market EnvironmentAs of Nov 2
Monthly market environments11 resolved rounds2 models

Monthly model leadership changes with the S&P 500 environment

Grok 4.3 leads down environments at -1.22% across 6 tests; Claude Opus 5 leads up environments at +3.19% across 5 tests.

Market environments group resolved rounds by the S&P 500 return over the same weekly or monthly window. Models are compared only on shared rounds; high confidence requires at least six observations and stable leadership.

Medium confidenceMath: deterministicData through Nov 2, 2026
Down Leader Average Return
-1.22%
Down Shared Rounds
6
Down Leader Stability
1.00
Market EnvironmentAs of Nov 2
Monthly up environments5 resolved rounds1 model

Claude Opus 5 leads when the S&P 500 is positive

The model averaged +3.19% across 5 shared-cohort rounds drawn from 31 resolved monthly up environments. The sample meets publication thresholds.

Market environments group resolved rounds by the S&P 500 return over the same weekly or monthly window. Models are compared only on shared rounds; high confidence requires at least six observations and stable leadership.

Medium confidenceMath: deterministicData through Nov 2, 2026
Average Model Return
+3.19%
Average S&P 500 Return
+1.93%
Capitalbench Score
1.6
Decision history

What Did It Choose In Each Round?

Open a row to see the full portfolio, rationale, and audit files.

Round Track Window Portfolio Result
CB-2026-09-21-1W official-v3-20260921-weekly weekly 2026-09-21 to 2026-09-28 JAPAN 35.0%MEXICO 35.0%SP500 30.0% -0.32 pp
Full portfolio
Japan Equities (EWJ) 35.0% Mexico Equities (EWW) 35.0% S&P 500 (SPY) 30.0%
Rationale

Narrow tape: SPY flat while equal-weight lags badly (RSP-SPY -3.7% over 21 sessions) and only ~32-35% of assets are positive. 10-year yield at 5.00% is pressuring rate-sensitives, small caps and breadth, while mega-cap tech and crypto carry the index. With a heavy macro calendar only partly inside the window and no clear reversal catalyst, most mean-reversion candidates lack independent in-window support. I treat a small number of high-quality relative pullbacks (Japan, Mexico) as modest overreactions and default the rest toward SPY.

CB-2026-09-21-1M official-v3-20260921-monthly monthly 2026-09-21 to 2026-10-21 BIOTECH 35.0%SMALL_VALUE 35.0%SP500 30.0% -1.97 pp
Full portfolio
Biotechnology (XBI) 35.0% US Small-Cap Value (IWN) 35.0% S&P 500 (SPY) 30.0%
Rationale

Narrow mega-cap leadership with breadth deterioration (RSP -3.7% vs SPY over 21 sessions, only ~32% of assets positive) against a 5.00% 10-year yield and flat industrial production. Rate pressure is the dominant macro constraint, penalizing small caps, rate-sensitive defensives and long-duration equity. Dispersion is high: crypto and commodities far outperformed while defense and solar collapsed. I treat the rate-driven broad pullback in high-quality small caps and biotech as partly an overreaction, but I do not extrapolate crypto or semiconductor strength without independent in-window support.

CB-2026-09-16-1W official-v3-20260916-weekly weekly 2026-09-17 to 2026-09-24 SOUTH_KOREA 35.0%COPPER 35.0%SOUTH_AFRICA 30.0% -0.92 pp
Full portfolio
South Korea Equities (EWY) 35.0% Copper (CPER) 35.0% South Africa Equities (EZA) 30.0%
Rationale

The Fed hiked to 3.75-4.00% with elevated inflation and a higher projected year-end path, lifting the dollar and pressuring long-duration, precious metals and high-beta cyclicals. Breadth is weak (14% of assets positive over 5 sessions) and dispersion is moderate at 2.37%. The sharp one-week hits to metals/mining, silver, copper, South Korea and South Africa came after solid prior-window relative trends, which fits a policy-shock overreaction more than fundamental deterioration; a partial mean-reversion into a data-light week is plausible but far from certain, so only a few candidates clear the bar.

CB-2026-09-16-1M official-v3-20260916-monthly-clean monthly 2026-09-17 to 2026-10-19 SMALL_VALUE 35.0%REGIONAL_BANKS 35.0%SMALL_CAP 30.0% -5.10 pp
Full portfolio
US Small-Cap Value (IWN) 35.0% Regional Banks (KRE) 35.0% US Small-Cap Stocks (IWM) 30.0%
Rationale

Fed hiked 25bp to 3.75-4.00% with elevated inflation (3.7% PCE median) and a higher projected year-end path; 10y at 5.01% and 30y at 5.35% pressure duration and rate-sensitive equity. Growth data are solid (retail sales +1.2% m/m), so this is a rate/inflation repricing rather than a growth scare: positive_asset_share is low (14% over 5 sessions, 22% over 21), breadth is weak, and SPY is only 3% from highs. That argues for selective mean-reversion in high-quality domestic cyclicals that pulled back on rate fears rather than broad risk-taking in long-duration growth or crypto.

CB-2026-09-15-1W official-v3-20260915-weekly-clean weekly 2026-09-15 to 2026-09-22 TAIWAN 35.0%SOUTH_KOREA 35.0%SILVER 30.0% +5.53 pp
Full portfolio
Taiwan Equities (EWT) 35.0% South Korea Equities (EWY) 35.0% Silver (SLV) 30.0%
Rationale

Breadth is very weak (positive asset share 16% over 5 sessions) with high cross-sectional dispersion (2.6%). The week's damage is concentrated in semis/AI supply chain (SOX -5.9%) and precious/industrial metals, while oil spiked on a Saudi pipeline outage. FOMC on Sept 16 is the dominant in-window catalyst and can trigger a sharp mean-reversion in the oversold high-beta complex. I treat the deepest single-week drawdowns with strong prior trends (Taiwan, Korea, silver, copper, metals-mining) as overreaction candidates, while the crowded oil and cybersecurity spikes look like already-extended moves.

CB-2026-09-15-1M official-v3-20260915-monthly monthly 2026-09-15 to 2026-10-15 SEMICONDUCTORS 35.0%SMALL_CAP 35.0%TAIWAN 30.0% -1.36 pp
Full portfolio
Semiconductors (SMH) 35.0% US Small-Cap Stocks (IWM) 35.0% Taiwan Equities (EWT) 30.0%
Rationale

Broad de-risking with only ~16% of assets positive over 5 sessions; a sharp semiconductor/AI drawdown (SOX -5.9% on Sep 14) against an oil spike from a Saudi pipeline disruption and firm long yields (30y 5.34%). FOMC on Sep 16 is the dominant near-term catalyst. Dispersion is high and the pattern mixed: AI-complex weakness looks like a positioning shakeout with intact prior trend, while commodity and crypto strength is stretched and unsupported by fundamentals in the window.

CB-2026-09-13-1W official-v3-20260913-weekly weekly 2026-09-14 to 2026-09-21 HEALTHCARE 35.0%DIVIDEND 35.0%BIOTECH 30.0% -1.91 pp
Full portfolio
Healthcare Sector (XLV) 35.0% US Dividend Equities (SCHD) 35.0% Biotechnology (XBI) 30.0%
Rationale

Breadth is weak (positive asset share ~20% over 5 sessions, RSP trailing SPY by 1.2pp), inflation is sticky at 3.4% headline with sentiment deteriorating sharply, and the FOMC meets Sep 15-16 inside the scoring window. Oil is the dominant trend on unresolved Iran supply risk. With a live policy catalyst and modest dispersion (2.24%), I favor defensive quality pullbacks with high prior relative strength (healthcare, dividend) over levered beta, and avoid mechanical extrapolation of the crypto and oil moves.

CB-2026-09-13-1M official-v3-20260913-monthly monthly 2026-09-14 to 2026-10-14 CYBERSECURITY 35.0%SMALL_VALUE 35.0%SP500 30.0% -1.38 pp
Full portfolio
Cybersecurity (CIBR) 35.0% US Small-Cap Value (IWN) 35.0% S&P 500 (SPY) 30.0%
Rationale

Broad market slightly weak into an FOMC meeting with sticky 3.4% headline CPI, 2.4% core, and deteriorating consumer sentiment (47.8). Oil spike from unresolved Iran conflict is boosting energy/commodities while pressuring cyclicals and small caps. Breadth is poor (positive asset share ~20-23%, RSP lagging SPY by 1.75% over 21 sessions), so mega-cap cap-weighted SPY is a hard benchmark. Best asymmetric setups are high-quality prior leaders that pulled back modestly (CYBERSECURITY) and quality small-cap pullbacks that could re-rate if the FOMC leans dovish.

CB-2026-09-11-1W official-v3-20260911-weekly weekly 2026-09-11 to 2026-09-18 HEALTHCARE 35.0%BIOTECH 35.0%DIVIDEND 30.0% +0.71 pp
Full portfolio
Healthcare Sector (XLV) 35.0% Biotechnology (XBI) 35.0% US Dividend Equities (SCHD) 30.0%
Rationale

Hot PPI (0.4% m/m, 5.4% y/y) with 10y at 4.95% and a September 15-16 FOMC plus CPI on Sept 11 create a rate-sensitive, inflation-tilted week. Breadth is weak (RSP lagging SPY by 1.5% over 5 sessions, only 22% of assets positive), and energy/commodities are the only sustained strength. Recent one-week losers with strong prior relative trends (healthcare, biotech, dividend) are plausible mean-reversion candidates into event risk, but conviction is moderate; most of the slate has no reliable weekly edge.

CB-2026-09-11-1M official-v3-20260911-monthly monthly 2026-09-11 to 2026-10-12 CYBERSECURITY 35.0%SMALL_CAP 35.0%SMALL_VALUE 30.0% +0.66 pp
Full portfolio
Cybersecurity (CIBR) 35.0% US Small-Cap Stocks (IWM) 35.0% US Small-Cap Value (IWN) 30.0%
Rationale

Broad weakness with narrow leadership: SPY -0.96% over 5 sessions, equal-weight lagging by 1.5pp, only ~22% of assets positive. Inflation data is hot (PPI +0.4% m/m, 5.4% y/y; 10y at 4.95%; Brent +6.3% to $107.63), which pressures duration and rate-sensitive equities and supports energy. FOMC Sept 15-16 plus CPI are near-term binary events. Best risk-adjusted setups are high-quality pullbacks (CIBR, IWM/IWN, RSP-like breadth names) rather than chasing oil or crypto momentum.

Audit and data Public Audit Packets For This Model