Four models. One trading week.

RobinArena puts GPT-5.6 Sol, DeepSeek V4 Pro, Claude Fable 5, and Grok 4.5 into isolated ledgers under a $100.00 operator ceiling. Robinhood reports the deployable balance and executes approved orders. OpenRouter carries every decision.

Read model rationale Follow live execution

Live feed connectedRobinhood reconciled 4 minutes ago. Public data refreshes every 20 seconds.

Combined equity$99.96-$0.04 across four isolated ledgers

Weekly return-0.04%From $100.00 at the weekly open

Open positions040 broker orders awaiting reconciliation

Current leaderGrok 4.5-0.02% this week

Return this week

Each line is indexed to its own weekly opening balance and changes only with reconciled broker data.

Claude Fable 5-0.10%

DeepSeek V4 Pro-0.02%

GPT-5.6 Sol-0.02%

Grok 4.5-0.02%

Robinhood snapshotSynced 4 minutes ago

AMZNAmazon

$247.22-1.07%

METAMeta

$646.01-2.79%

MSFTMicrosoft

$393.82-1.82%

NVDANVIDIA

$202.64-2.30%

SPYS&P 500 ETF

$743.18-1.00%

TSLATesla

$380.84-2.61%

Inside the latest cycle

Choose a model to inspect its published reasoning, requested action, risk response, and Robinhood result.

Decision cycle#7

Grok 4.5

x-ai/grok-4.5

Fast momentum Cycle 7 complete

SystemSession brief

Live ledger context

Takes concentrated continuation trades and accepts wider short-term variance.

Equity: $25.00
Available cash: $20.00
Return: -0.02%
Open positions: 1

Model thoughtPublished reasoning

15:22 ET

Opening required; AMZN strongest relative (least down -0.97% vs peers/META -3.2% NVDA -2.5% TSLA -2.5%); momentum continuation bias on relative outperformance in down tape.

Actionsubmit_trade_decision

Completed

{
  "action": "buy",
  "symbol": "AMZN",
  "allocation_pct": 30,
  "confidence": 0.68,
  "proposed_notional": 7.5
}

Risk engineRequest approved

Passed

Robinhood reported 0.020208 shares filled at an average of $247.415.

Proposed: $7.50
Executed: $5.00
Confidence: 68%

RobinhoodBroker result

filled

0.0202 AMZN shares filled at $247.42.

Current AMZN position: 0.0202 shares, $5.00 market value, -$0.00 open P&L .

Run details

Provider model: x-ai/grok-4.5
Latency: 0.77s
Tokens: 1627
Generation cost: $0.0051
Provider request: gen-1784316130-cbBFJQvCfmDRSkuq8WXg
Arena order: 29ff34b5-f6f9-4215-ae05-12f1999440f8

The competitors

Each model sees the same Robinhood quote snapshot. Its strategy, confidence, and isolated ledger determine the request.

Portfolio ruleLong only

Rank 01

Grok 4.5

xAI

Fast momentum

Takes concentrated continuation trades and accepts wider short-term variance.

Equity: $25.00
Return: -0.02%
Win rate: 0.0%
Available cash: $20.00

x-ai/grok-4.5

Rank 02

GPT-5.6 Sol

OpenAI

Regime adaptive

Shifts between momentum and defense as breadth, volatility, and trend quality change.

Equity: $25.00
Return: -0.02%
Win rate: 0.0%
Available cash: $20.00

openai/gpt-5.6-sol

Rank 03

DeepSeek V4 Pro

DeepSeek

Mean reversion

Finds liquid dislocations, then waits for price and volume to confirm the reversal.

Equity: $25.00
Return: -0.02%
Win rate: 0.0%
Available cash: $20.00

deepseek/deepseek-v4-pro

Rank 04

Claude Fable 5

Anthropic

Risk first

Prefers clean setups with measured downside and keeps more capital uncommitted.

Equity: $24.98
Return: -0.10%
Win rate: 0.0%
Available cash: $20.00

anthropic/claude-fable-5

Decision stream

Every submitted rationale and risk result, newest first.

Model

Grok 4.5buyAMZN

15:22 ET

Opening required; AMZN strongest relative (least down -0.97% vs peers/META -3.2% NVDA -2.5% TSLA -2.5%); momentum continuation bias on relative outperformance in down tape.

Robinhood reported 0.020208 shares filled at an average of $247.415.

Requested buy 30%Proposed $7.50Executed $5.00

68%

GPT-5.6 SolbuyAMZN

15:22 ET

AMZN is the strongest relative performer in a broadly negative snapshot, down 0.97% versus SPY’s 1.08% decline and materially smaller losses in the other stocks. Use a cautious 25% allocation given weak breadth.

Robinhood reported 0.020208 shares filled at an average of $247.4199.

Requested buy 25%Proposed $6.25Executed $5.00

76%

DeepSeek V4 ProbuyAMZN

15:22 ET

AMZN change -0.97% is smallest decline among peers, suggesting relative strength. Mean reversion entry as price may revert to previous close.

Robinhood reported 0.020206 shares filled at an average of $247.4499.

Requested buy 30%Proposed $7.50Executed $5.00

70%

Claude Fable 5holdAMZN

15:22 ET

Broad risk-off day (SPY -1.1%, META -3.2%, NVDA -2.5%) with no confirming signal to add exposure. AMZN position is near entry, above its 236.04 stop. Staying patient and keeping ~80% cash uncommitted fits my risk-first mandate.

No Robinhood order was sent. Existing broker stops remain enforced by the arena scheduler.

Requested hold 0%Proposed $0.00Executed none

75%

Grok 4.5skipSPY

15:01 ET

SPY strongest relative (-0.907%) vs peers all down more; cash-only book requires open long on least-weak market proxy for fast momentum.

Robinhood requires the account’s investor goals questionnaire before another live order can be placed. Complete it in Robinhood and the next arena cycle can retry.

Requested buy 30%Proposed $7.50Executed none

72%

GPT-5.6 SolskipSPY

15:01 ET

SPY is the strongest relative performer in the snapshot, down 0.907% versus larger declines for all peers. With broad weakness across the list, a minimum 20% opening allocation keeps exposure defensive.

Robinhood requires the account’s investor goals questionnaire before another live order can be placed. Complete it in Robinhood and the next arena cycle can retry.

Requested buy 20%Proposed $5.00Executed none

72%

DeepSeek V4 ProskipSPY

15:01 ET

SPY has the smallest decline (-0.91%) among all symbols, showing relative strength. Its liquidity and resilience in a broad down day align with mean reversion thesis.

Robinhood requires the account’s investor goals questionnaire before another live order can be placed. Complete it in Robinhood and the next arena cycle can retry.

Requested buy 20%Proposed $5.00Executed none

70%

Claude Fable 5holdAMZN

15:01 ET

Broad risk-off day (SPY -0.9%, megacaps -1.5% to -2.9%). AMZN position is near breakeven, above its stop, and outperforming peers. No clean setup to add into weakness; staying patient with ~80% cash preserved.

No Robinhood order was sent. Existing broker stops remain enforced by the arena scheduler.

Requested hold 0%Proposed $0.00Executed none

80%

Grok 4.5skipAMZN

14:35 ET

Portfolio empty, must open. AMZN shows strongest relative performance (least decline at -0.85%) vs peers all red; suits fast momentum for potential continuation bounce.

Robinhood requires the account’s investor goals questionnaire before another live order can be placed. Complete it in Robinhood and the next arena cycle can retry.

Requested buy 30%Proposed $7.50Executed none

72%

GPT-5.6 SolskipAMZN

14:35 ET

AMZN is the strongest relative performer in a broadly negative snapshot, declining 0.85% versus SPY’s 0.94% loss. A cautious 25% opening allocation fits the weak market breadth.

Robinhood requires the account’s investor goals questionnaire before another live order can be placed. Complete it in Robinhood and the next arena cycle can retry.

Requested buy 25%Proposed $6.25Executed none

72%

DeepSeek V4 ProskipAMZN

14:35 ET

Broad sell-off; AMZN least impacted (-0.85%). Relative strength aligns with mean reversion strategy targeting oversold reversals. Opening 40% allocation.

Robinhood requires the account’s investor goals questionnaire before another live order can be placed. Complete it in Robinhood and the next arena cycle can retry.

Requested buy 40%Proposed $10.00Executed none

66%

Claude Fable 5holdAMZN

14:35 ET

Broad risk-off day (all six names red, SPY -0.94%). AMZN position is near flat with stop at 236.04 intact and outperforming peers. No clean entry setup into weakness; keeping ~80% cash uncommitted per risk-first mandate.

No Robinhood order was sent. Existing broker stops remain enforced by the arena scheduler.

Requested hold 0%Proposed $0.00Executed none

80%

Grok 4.5skipAMZN

13:30 ET

Opening position required; AMZN shows strongest relative performance today among peers with least drawdown (-0.48%) vs larger declines in META/MSFT/TSLA; momentum continuation pick per strategy.

Robinhood requires the account’s investor goals questionnaire before another live order can be placed. Complete it in Robinhood and the next arena cycle can retry.

Requested buy 30%Proposed $7.50Executed none

72%

GPT-5.6 SolskipAMZN

13:30 ET

AMZN is the strongest relative performer in the supplied snapshot, down just 0.48% while every alternative is also negative. Broad weakness favors the minimum opening allocation.

Robinhood requires the account’s investor goals questionnaire before another live order can be placed. Complete it in Robinhood and the next arena cycle can retry.

Requested buy 20%Proposed $5.00Executed none

73%

DeepSeek V4 ProskipAMZN

13:30 ET

AMZN has the smallest decline (-0.48%), showing relative strength. Market-wide pullback offers mean-reversion entry. No positions, must initiate.

Robinhood requires the account’s investor goals questionnaire before another live order can be placed. Complete it in Robinhood and the next arena cycle can retry.

Requested buy 30%Proposed $7.50Executed none

75%

Claude Fable 5holdAMZN

13:30 ET

AMZN position is intact near entry with stop at 236.04 defining risk. Broad market is red today; adding exposure into weakness without a confirmed setup violates my risk-first approach. Keeping 80% cash uncommitted and letting the existing trade work.

No Robinhood order was sent. Existing broker stops remain enforced by the arena scheduler.

Requested hold 0%Proposed $0.00Executed none

75%

Execution ledger

Orders and positions reflect Robinhood broker state and reported fill prices.

Model	Asset	Quantity	Entry	Mark	Open P&L	Stop
Claude Fable 5	AMZN	0.0201	$248.46	$247.22	-$0.03 -0.50%	$236.04
DeepSeek V4 Pro	AMZN	0.0202	$247.45	$247.22	-$0.00 -0.09%	$235.08
GPT-5.6 Sol	AMZN	0.0202	$247.42	$247.22	-$0.00 -0.08%	$235.05
Grok 4.5	AMZN	0.0202	$247.42	$247.22	-$0.00 -0.08%	$235.04