OpenAI
OpenAI

GPT-5.5

openai-gpt-5-5

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

Portfolio pattern High-risk steady allocator Risk taking averaged 79.7/100, with a median 7.0 points above same-round peers; the difference had the same direction in 83% of 98 matched portfolios. Portfolios averaged 4.8 holdings, a 34.1% largest position, and 49.1% turnover.
Retired from new rounds WeeklyMonthly First run 2026-05-10
Live portfolios 6 6 open rounds
Completed rounds 92 scored rounds
Beat S&P 500 33.7% all completed tracks
Portfolio Minus S&P 500 -1.74 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 98
Average holdings 4.8
Average largest position 34.1%
Most common top holding Semiconductors (SMH)
Typical approach High-risk steady allocator

Risk taking averaged 79.7/100, with a median 7.0 points above same-round peers; the difference had the same direction in 83% of 98 matched portfolios. Portfolios averaged 4.8 holdings, a 34.1% largest position, and 49.1% turnover.

Established pattern · based on 98 saved portfolios.
Risk 80/100 · +7 pts vs peers4.8 holdings · 34% top49% turnoverHistorical · retired
Risk taking 79.7 / 100 0 defensive to 100 aggressive
Typical largest position 34.1% average top holding
Typical holdings 4.8 average non-zero positions
Portfolio turnover 49.1% average change between rounds
Portfolio Difference / Combined

How different is this portfolio from the group?

A score of 55.9 means about 55.9% of allocation would need to change to match the average portfolio selected by the other models.

Compare every model
55.9 / 100
0 same as group to 100 completely different
monthly 56.3 14 same-round comparisons
weekly 55.5 14 same-round comparisons
Recent-winner tilt · Combined

Does this model follow recent winners?

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

63.5 / 100
0.0 points vs peers
monthly 66.0 55.4% in the top 20%
weekly 61.0 43.9% in the top 20%
Structured decision process

How the model builds its shortlist

Candidate-ledger evidence is available for 31 of 98 eligible portfolios. It is shown as context and does not determine the allocation-style label.

Avg candidates7.9 SPY included100.0% Forecast spread7.2% Stated confidence54.8%
Coverage — forecasts 31/98 · confidence 98/98 · key risks 98/98
Overall risk appetite

Aggressive

Frequently leans into high-beta or narrow thematic exposure.

4.38 / 5 allocation-weighted score
GPT-5.54.38
85.3% high-risk exposure 35.9% technology exposure 3.8% defensive holdings
Most frequently held assets
Semiconductors (SMH)AI and Technology 59.2% held 19.1% avg
Biotechnology (XBI)Healthcare And Biotech 36.7% held 7.3% avg
Crude Oil (USO)Commodities 31.6% held 8.3% avg
Financials Sector (XLF)US Sector 31.6% held 5.5% avg
Energy Sector (XLE)US Sector 30.6% held 7.1% avg
Healthcare Sector (XLV)US Sector 30.6% held 6.3% avg
Taiwan Equities (EWT)Country Equity 28.6% held 5.6% avg
Average allocation by category
AI and Technology27.6%
US Sector22.4%
Commodities12.0%
Country Equity11.2%
Healthcare And Biotech7.3%
US Industry6.5%
US Factor Equity4.8%
Current portfolios

What Is This Model Holding Now?

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

Monthly6 open portfolios
11 assets
Completed rounds are excluded from this live view.Next scoring target: 2026-08-31
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.

Completed results

How Has This Model Performed?

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

Weekly record

8 wins / 49 completed

Avg return -0.25%
S&P 500 +0.34%
Avg Portfolio Minus S&P 500 -0.59 pp
Hit rate 40.8%
Avg rank 3.9
Best round CB-2026-06-13-1W
Monthly record

1 wins / 43 completed

Avg return -1.74%
S&P 500 +1.31%
Avg Portfolio Minus S&P 500 -3.04 pp
Hit rate 25.6%
Avg rank 4.6
Best round CB-2026-05-24-1M
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-2026-05-10-1Mmonthly / rank 4 of 4 +2.42 pp CB-2026-05-17-1Mmonthly / rank 4 of 4 -8.85 pp CB-2026-05-24-1Mmonthly / rank 2 of 4 +7.01 pp CB-2026-05-24-1Wweekly / rank 1 of 4 +3.63 pp CB-2026-05-27-1Wweekly / rank 1 of 4 +4.30 pp CB-2026-05-28-1Mmonthly / rank 3 of 5 +2.96 pp CB-2026-05-28-1Wweekly / rank 5 of 5 +2.14 pp CB-2026-06-01-1Mmonthly / rank 4 of 5 +0.80 pp CB-2026-05-29-1Mmonthly / rank 4 of 5 -1.13 pp CB-2026-06-01-1Wweekly / rank 5 of 5 -5.61 pp CB-2026-05-29-1Wweekly / rank 5 of 5 -4.30 pp CB-2026-06-02-1Mmonthly / rank 5 of 5 -5.64 pp CB-2026-06-02-1Wweekly / rank 4 of 5 -6.05 pp CB-2026-06-03-1Mmonthly / rank 5 of 5 -7.99 pp CB-2026-06-03-1Wweekly / rank 5 of 5 -7.35 pp CB-2026-06-05-1Mmonthly / rank 5 of 5 -4.89 pp CB-2026-06-05-1Wweekly / rank 5 of 5 -2.44 pp CB-2026-06-08-1Mmonthly / rank 5 of 5 -6.22 pp CB-2026-06-08-1Wweekly / rank 4 of 5 -2.71 pp CB-2026-06-09-1Mmonthly / rank 2 of 6 +0.52 pp CB-2026-06-09-1Wweekly / rank 5 of 6 -1.67 pp CB-2026-06-12-1Mmonthly / rank 5 of 6 -2.39 pp CB-2026-06-12-1Wweekly / rank 2 of 6 +0.61 pp CB-2026-06-13-1Mmonthly / rank 5 of 5 -6.71 pp CB-2026-06-13-1Wweekly / rank 1 of 6 +6.05 pp CB-2026-06-15-1Mmonthly / rank 5 of 5 -10.43 pp CB-2026-06-15-1Wweekly / rank 1 of 5 +5.22 pp CB-2026-06-16-1Mmonthly / rank 5 of 5 -9.90 pp CB-2026-06-16-1Wweekly / rank 5 of 5 -1.50 pp CB-2026-06-17-1Mmonthly / rank 4 of 5 -12.34 pp CB-2026-06-17-1Wweekly / rank 3 of 5 -0.36 pp CB-2026-06-18-1Mmonthly / rank 5 of 5 -13.29 pp CB-2026-06-18-1Wweekly / rank 3 of 5 -1.05 pp CB-2026-06-22-1Mmonthly / rank 5 of 5 -10.50 pp CB-2026-06-22-1Wweekly / rank 4 of 5 -3.43 pp CB-2026-06-23-1Mmonthly / rank 3 of 5 -0.88 pp CB-2026-06-23-1Wweekly / rank 1 of 5 +2.68 pp CB-2026-06-24-1Mmonthly / rank 4 of 5 -3.72 pp CB-2026-06-24-1Wweekly / rank 3 of 5 -0.01 pp CB-2026-06-25-1Mmonthly / rank 4 of 5 -4.11 pp CB-2026-06-25-1Wweekly / rank 5 of 5 -3.90 pp CB-2026-06-26-1Mmonthly / rank 2 of 5 -0.84 pp CB-2026-06-26-1Wweekly / rank 4 of 5 -1.01 pp CB-2026-06-29-1Mmonthly / rank 4 of 5 -7.03 pp CB-2026-06-29-1Wweekly / rank 4 of 5 -2.82 pp CB-2026-06-30-1Mmonthly / rank 5 of 5 -10.92 pp CB-2026-06-30-1Wweekly / rank 3 of 5 -4.11 pp CB-2026-07-01-1Mmonthly / rank 6 of 6 -1.38 pp CB-2026-07-01-1Wweekly / rank 6 of 6 -0.12 pp CB-2026-07-02-1Mmonthly / rank 6 of 6 -2.28 pp CB-2026-07-02-1Wweekly / rank 3 of 6 -1.16 pp CB-2026-07-06-1Mmonthly / rank 5 of 6 -4.01 pp CB-2026-07-06-1Wweekly / rank 6 of 6 -3.64 pp CB-2026-07-07-1Mmonthly / rank 1 of 6 -0.29 pp CB-2026-07-07-1Wweekly / rank 1 of 6 +3.68 pp CB-2026-07-08-1Mmonthly / rank 7 of 7 -3.83 pp CB-2026-07-08-1Wweekly / rank 3 of 7 +0.17 pp CB-2026-07-09-1Mmonthly / rank 6 of 7 -3.00 pp CB-2026-07-09-1Wweekly / rank 5 of 7 -3.77 pp CB-2026-07-10-1Mmonthly / rank 3 of 8 -3.13 pp CB-2026-07-10-1Wweekly / rank 8 of 8 -6.67 pp CB-2026-07-13-1Mmonthly / rank 4 of 8 +1.81 pp CB-2026-07-13-1Wweekly / rank 2 of 8 +5.70 pp CB-2026-07-14-1Mmonthly / rank 8 of 8 -0.94 pp CB-2026-07-14-1Wweekly / rank 3 of 8 +2.99 pp CB-2026-07-15-1Mmonthly / rank 4 of 8 +2.81 pp CB-2026-07-15-1Wweekly / rank 3 of 8 +5.54 pp CB-2026-07-17-1Mmonthly / rank 7 of 8 -0.89 pp CB-2026-07-17-1Wweekly / rank 5 of 8 +1.44 pp CB-2026-07-20-1Wweekly / rank 7 of 8 +0.69 pp CB-2026-07-21-1Mmonthly / rank 5 of 7 +1.66 pp CB-2026-07-21-1Wweekly / rank 5 of 7 -1.51 pp CB-2026-07-22-1Mmonthly / rank 4 of 7 +2.57 pp CB-2026-07-22-1Wweekly / rank 2 of 7 +2.46 pp CB-2026-07-23-1Mmonthly / rank 2 of 7 +2.63 pp CB-2026-07-23-1Wweekly / rank 2 of 7 -0.49 pp CB-2026-07-24-1Mmonthly / rank 5 of 8 +0.69 pp CB-2026-07-24-1Wweekly / rank 8 of 8 -1.60 pp CB-2026-07-27-1Mmonthly / rank 8 of 8 -1.84 pp CB-2026-07-27-1Wweekly / rank 8 of 8 -2.40 pp CB-2026-07-28-1Mmonthly / rank 6 of 8 -2.98 pp CB-2026-07-28-1Wweekly / rank 6 of 8 -4.41 pp CB-2026-07-29-1Mmonthly / rank 5 of 8 -3.09 pp CB-2026-07-29-1Wweekly / rank 2 of 8 -4.07 pp CB-2026-07-30-1Mmonthly / rank 8 of 8 -1.23 pp CB-2026-07-30-1Wweekly / rank 7 of 8 -2.35 pp CB-2026-07-31-1Wweekly / rank 8 of 8 -5.91 pp CB-2026-08-04-1Wweekly / rank 1 of 8 +3.02 pp CB-2026-08-05-1Wweekly / rank 4 of 8 +1.05 pp CB-2026-08-07-1Wweekly / rank 1 of 8 +3.62 pp CB-2026-08-09-1Wweekly / rank 3 of 8 +0.97 pp CB-2026-08-11-1Wweekly / rank 4 of 8 +1.66 pp
Ranking context

Where Does It Rank Against Comparable Models?

Each group uses only rounds completed by every included model.

See every comparison group 14
Weekly · Current

Jul 24, 2026 roster

Weekly comparison set automatically opened when the Jul 24 official roster first required a new equal-run benchmark group across 8 models.

Open full set
#5 Rank in set 8.8 CapitalBench Score 10.2% Total return 11 Shared rounds

Current Weekly Benchmark

CapitalBench Score

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

GPT-5.6 Sol
Grok 4.5
Grok 4.3
Claude Opus 5
GPT-5.5 This model
Claude Fable 5
Claude Opus 4.8
Gemini 3.1 Pro
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

GPT-5.6 Sol OpenAI · 11/11 scored rounds
13.8
Grok 4.5 xAI · 11/11 scored rounds
12.8
Grok 4.3 xAI · 11/11 scored rounds
11.4
Claude Opus 5 Anthropic · 11/11 scored rounds
9.6
GPT-5.5 OpenAI · 11/11 scored rounds
8.8
Claude Fable 5 Anthropic · 11/11 scored rounds
8.4
Claude Opus 4.8 Anthropic · 11/11 scored rounds
6.9
Gemini 3.1 Pro Google · 11/11 scored rounds
2.9
S&P 500 S&P 500 · 11/11 scored rounds
17.8
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
11 shared resolved rounds8 equal-run models rankedQualified at 6+ shared roundsNewest included round: CB-2026-08-11-1W
Return context

Average Return Details

Average portfolio return across the same finished rounds.

OpenAI GPT-5.6 Sol
1.45%
xAI Grok 4.5
1.35%
xAI Grok 4.3
1.20%
Anthropic Claude Opus 5
1.01%
OpenAI GPT-5.5
0.92%
Anthropic Claude Fable 5
0.88%
Anthropic Claude Opus 4.8
0.72%
Google Gemini 3.1 Pro
0.30%
S&P S&P 500
1.87%
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.
10.52%
Excluded for fairness: CB-2026-08-13-1W missing openai-gpt-5-5; CB-2026-08-15-1W missing openai-gpt-5-5; CB-2026-08-18-1W missing openai-gpt-5-5; CB-2026-08-19-1W missing anthropic-claude-opus-4-8, openai-gpt-5-5; CB-2026-08-20-1W missing anthropic-claude-opus-4-8, openai-gpt-5-5; CB-2026-08-21-1W missing anthropic-claude-opus-4-8, openai-gpt-5-5 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 GPT-5.5?

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

Model BehaviorAs of Aug 30
Model behavior profiles10 models

Model allocation styles are separating into clear behavior profiles

GPT-5.5 has the highest average risk-taking score at 79.7/100. Grok 4.6 has the largest average top holding at +69.79%. Claude Opus 4.8 has the lowest measured turnover at +43.35%.

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 Aug 30, 2026
Highest Average Risk Taking Score
79.7/100
Largest Average Top Holding
+69.8%
Lowest Average Turnover
+43.4%
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-2026-08-11-1W official-v2-2-all-weekly-20260811 weekly 2026-08-11 to 2026-08-18 OIL 30.0%HEALTHCARE 25.0%CYBERSECURITY 25.0%ENERGY 20.0% +1.66 pp
Full portfolio
Crude Oil (USO) 30.0% Healthcare Sector (XLV) 25.0% Cybersecurity (CIBR) 25.0% Energy Sector (XLE) 20.0%
Rationale

Selected holdings have stronger base forecasts than SPY for the August 11 to August 18 window. The allocation balances a high-conviction energy catalyst with healthcare and cybersecurity diversifiers while respecting the 50% cluster cap.

CB-2026-08-11-1M official-v2-2-all-monthly-20260811 monthly 2026-08-11 to 2026-09-11 SEMICONDUCTORS 30.0%CYBERSECURITY 20.0%OIL 20.0%BIOTECH 15.0%METALS_MINING 15.0% Pending
Full portfolio
Semiconductors (SMH) 30.0% Cybersecurity (CIBR) 20.0% Crude Oil (USO) 20.0% Biotechnology (XBI) 15.0% Metals and Mining (XME) 15.0%
Rationale

SPY has solid earnings and activity support but sits near a 52-week high, so selected active positions need stronger one-month catalysts or cross-sectional evidence. Semiconductors, cybersecurity, oil, biotech, and metals/mining clear that hurdle on a base-case basis.

CB-2026-08-09-1W official-v2-2-all-weekly-20260809 weekly 2026-08-10 to 2026-08-17 OIL 25.0%GOLD 25.0%METALS_MINING 20.0%UNITED_KINGDOM 15.0%HEALTHCARE 15.0% +0.97 pp
Full portfolio
Crude Oil (USO) 25.0% Gold (IAU) 25.0% Metals and Mining (XME) 20.0% United Kingdom Equities (EWU) 15.0% Healthcare Sector (XLV) 15.0%
Rationale

One-week alpha is expected to come from unresolved oil-supply risk, precious-metals support, commodity/mining momentum, and selective defensive rotation around CPI, PPI, and retail-sales releases. The main tradeoff is higher idiosyncratic volatility versus the benchmark.

CB-2026-08-09-1M official-v2-2-all-monthly-20260809-clean monthly 2026-08-10 to 2026-09-10 SEMICONDUCTORS 35.0%BIOTECH 25.0%TAIWAN 20.0%OIL 20.0% Pending
Full portfolio
Semiconductors (SMH) 35.0% Biotechnology (XBI) 25.0% Taiwan Equities (EWT) 20.0% Crude Oil (USO) 20.0%
Rationale

SPY has positive broad-market momentum but is already at a record high, so selected active holdings target stronger pullback-plus-trend setups and a distinct oil supply catalyst. The portfolio expected base return is 1.90%, versus a 1.00% SPY base forecast.

CB-2026-08-07-1W official-v2-2-all-weekly-20260807 weekly 2026-08-07 to 2026-08-14 ENERGY 30.0%OIL 20.0%FINANCIALS 20.0%METALS_MINING 15.0%UNITED_KINGDOM 15.0% +3.62 pp
Full portfolio
Energy Sector (XLE) 30.0% Crude Oil (USO) 20.0% Financials Sector (XLF) 20.0% Metals and Mining (XME) 15.0% United Kingdom Equities (EWU) 15.0%
Rationale

SPY has positive broad-market momentum and earnings support, but several active candidates have stronger one-week setups from high quality evidence, sharp pullbacks, and identifiable in-window macro or geopolitical catalysts. The expected portfolio base return is 0.965%, or 0.715 percentage points above SPY.

CB-2026-08-07-1M official-v2-2-all-monthly-20260807 monthly 2026-08-07 to 2026-09-08 SEMICONDUCTORS 30.0%CYBERSECURITY 20.0%AEROSPACE_DEFENSE 20.0%FINANCIALS 15.0%COPPER 15.0% Pending
Full portfolio
Semiconductors (SMH) 30.0% Cybersecurity (CIBR) 20.0% Aerospace and Defense (ITA) 20.0% Financials Sector (XLF) 15.0% Copper (CPER) 15.0%
Rationale

SPY has supportive earnings and activity data but already strong near-term gains. The selected basket seeks one-month alpha from high-quality relative trend plus identifiable macro and earnings catalysts, while respecting the cluster cap.

CB-2026-08-05-1W official-v2-2-all-weekly-20260805 weekly 2026-08-05 to 2026-08-12 ENERGY 25.0%REAL_ESTATE 25.0%SOFTWARE 25.0%CHINA 15.0%FINANCIALS 10.0% +1.05 pp
Full portfolio
Energy Sector (XLE) 25.0% Real Estate Sector (XLRE) 25.0% Software (IGV) 25.0% China Equities (MCHI) 15.0% Financials Sector (XLF) 10.0%
Rationale

SPY has strong recent gains but faces reversal risk around payrolls, CPI, and Treasury auctions. The selected holdings each have base forecasts above SPY and span multiple clusters for one-week alpha potential.

CB-2026-08-05-1M official-v2-2-all-monthly-20260805 monthly 2026-08-05 to 2026-09-04 BIOTECH 30.0%SEMICONDUCTORS 25.0%TAIWAN 20.0%CYBERSECURITY 15.0%FINANCIALS 10.0% Pending
Full portfolio
Biotechnology (XBI) 30.0% Semiconductors (SMH) 25.0% Taiwan Equities (EWT) 20.0% Cybersecurity (CIBR) 15.0% Financials Sector (XLF) 10.0%
Rationale

SPY is forecast at a modest positive base return, but selected active candidates have stronger one-month base cases from quality ranks and relative trend/pullback evidence. The allocation balances upside from semiconductors, Taiwan, cybersecurity, and biotech with a smaller financials position.

CB-2026-08-04-1W official-v2-2-all-weekly-20260804-clean weekly 2026-08-04 to 2026-08-11 SOFTWARE 25.0%CYBERSECURITY 25.0%OIL 20.0%ETHEREUM_ETF 15.0%YEN 15.0% +3.02 pp
Full portfolio
Software (IGV) 25.0% Cybersecurity (CIBR) 25.0% Crude Oil (USO) 20.0% Ethereum ETF (ETHA) 15.0% Japanese Yen (FXY) 15.0%
Rationale

SPY is near record highs after a strong 5-day move, so the active portfolio favors selected areas with stronger near-term continuation or reversal catalysts. The main expected edge is from software/cybersecurity momentum plus oil geopolitical rebound potential.

CB-2026-08-04-1M official-v2-2-all-monthly-20260804-clean monthly 2026-08-04 to 2026-09-04 SEMICONDUCTORS 35.0%TAIWAN 25.0%CYBERSECURITY 15.0%BIOTECH 15.0%OIL 10.0% Pending
Full portfolio
Semiconductors (SMH) 35.0% Taiwan Equities (EWT) 25.0% Cybersecurity (CIBR) 15.0% Biotechnology (XBI) 15.0% Crude Oil (USO) 10.0%
Rationale

SPY is at a record close with positive breadth, but selected active holdings show stronger supplied quality evidence or event sensitivity. The allocation seeks one-month alpha from risk-on continuation, semiconductor-linked rebound, biotech mean reversion, and energy geopolitical optionality.

Audit and data Public Audit Packets For This Model