AI stock battle week 10: Grok retakes the lead on the last day as five AIs gain (September 26, 2026)

Six robots labelled Claude, Gemini, ChatGPT, Grok, DeepSeek and Meta AI standing in a row on a pink background, with the headline Grok takes the lead on the last day

Key points

  • Grok took first place on Friday, ending DeepSeek's five-week run on top.
  • Five of the six AIs gained in a week when chip stocks rallied.
  • Claude sold UiPath, and Meta AI bought it at the same price.

Grok didn't sell a single share in this contest until September 19. A week after that first trade, it's in first place, $55.67 ahead of DeepSeek.

Five of the six models gained. Together, the six portfolios added $2,461.41, while Gemini slipped 0.29%.

If you're new here: Claude, ChatGPT, Gemini, Grok, DeepSeek, and Meta AI each started with $10,000 in fake money. They buy five AI stocks apiece, each worth less than $10 billion when purchased, and can change their picks once a week. The full rules are here.

Unless noted otherwise, values use the latest available trade through 8 p.m. Eastern on Friday, September 25, including after-hours trading.

ModelAccount valueTotal returnThis week
Grok$11,165.55+11.66%+8.55%
DeepSeek$11,109.88+11.10%+0.73%
Gemini$10,676.97+6.77%-0.29%
ChatGPT$10,657.49+6.57%+5.20%
Claude$9,833.41-1.67%+6.85%
Meta AI$9,641.80-3.58%+4.04%

Account values at the Sept. 25 price.

Claude passed Meta AI on Wednesday to climb out of last place. Both are still below $10,000.

The lead changed hands three times in three days

DayGrokDeepSeek
Monday$10,712.07$11,398.40
Tuesday$11,161.20$11,432.03
Wednesday$10,984.46$10,958.12
Thursday$10,954.07$11,101.52
Friday$11,165.55$11,109.88

Monday through Thursday use the 4 p.m. close. Friday uses the Sept. 25 price.

DeepSeek had finished first every week since week five. Grok passed it at Wednesday's close, lost the lead on Thursday, and took it back on Friday.

Two stocks Grok has owned since week one did most of the work. Aehr Test Systems (AEHR), which makes equipment that tests chips before they ship, rose 11.70% for the week, including a gain of more than 7% on Friday. Innodata (INOD) rose 21.36%. Penguin Solutions (PENG), bought on September 19 in Grok's first trade, added 6.86%.

DeepSeek rose 0.73%. A 6.04% gain in Rigetti Computing (RGTI) wasn't enough to keep pace.

A report about Meta lifted three portfolios

Innodata jumped 14.6% on Tuesday alone after Hunterbrook published a report saying the training-data company may be helping train Muse, the assistant Meta launched on September 8. Neither company confirmed the link, and Hunterbrook's investing arm disclosed that it owned the stock. We covered the report here.

ChatGPT, Grok, and Meta AI all own Innodata, so Meta AI, the chatbot, made money on a report about Meta, the company. Each Saturday, we give the models their holdings without adding news or headlines.

Chip stocks led the week. The VanEck semiconductor fund rose 5.86%, against 1.59% for the iShares software fund, and Claude and Grok, the two models with the most money in chip-related stocks, had the two best weeks.

Claude sold UiPath. Meta AI bought it.

On September 26, Claude sold UiPath (PATH) at $12.46, 23.36% below what it paid, and put the $1,412.60 into Elastic (ESTC) at $87.50. It was Claude's first trade since week five.

Claude had held UiPath on the argument that the stock was only falling with the rest of software. It changed its view after UiPath fell for two weeks while the software fund rose. Claude picked Elastic because its search tools are something AI applications use, not something AI is expected to replace. The risks it lists are that Elastic lost money on a GAAP basis last quarter, and at about $9.2 billion it's close to the ceiling.

The rest of Claude's book did well. Rambus (RMBS) rose 18.37% and Ambarella (AMBA) 10.40%, while Argan (AGX) fell another 6.35%.

The same day, Meta AI sold Applied Digital (APLD) and SoundHound (SOUN) and split $4,439.32 between SentinelOne (S) and UiPath, buying it at the same $12.46 Claude sold for. Its one-line case called UiPath an "Automation leader" riding the "agentic AI enterprise wave." Neither model was told what the other did.

ChatGPT, Gemini, and Grok held all five. DeepSeek proposed swapping its whole portfolio, including Healwell AI, which trades over the counter and breaks the rules. Asked again, it held all five.

The tables below show each portfolio after the September 26 trades, valued with the pricing convention above. Elastic, SentinelOne, and Meta AI's UiPath are priced at their entry. Shares and values are rounded; account totals use full precision.

Grok, $11,165.55

TickerSharesEntrySept. 25 priceValue
AEHR26.21$76.30$104.44$2,737.63
INOD35.77$55.91$69.44$2,483.99
BBAI723.33$2.77$2.80$2,025.32
SOUN324.94$6.16$6.07$1,972.25
PENG34.33$53.06$56.70$1,946.37

DeepSeek, $11,109.88

TickerSharesEntrySept. 25 priceValue
RGTI141.14$14.17$16.69$2,355.68
QBTS129.64$17.08$17.41$2,257.00
LEU14.83$144.90$147.99$2,194.41
PDYN404.86$4.94$5.42$2,194.33
RCAT314.70$6.83$6.70$2,108.46

Gemini, $10,676.97

TickerSharesEntrySept. 25 priceValue
AI342.81$9.13$10.66$3,654.31
APLD76.94$27.12$26.30$2,023.50
ONDS263.09$7.40$7.69$2,023.18
RCAT285.15$6.83$6.70$1,910.50
BBAI380.53$2.74$2.80$1,065.48

ChatGPT, $10,657.49

TickerSharesEntrySept. 25 priceValue
INOD35.77$55.91$69.44$2,483.99
RGTI141.14$14.17$16.69$2,355.68
AEVA131.95$15.44$15.58$2,055.84
CAMT13.53$147.85$147.05$1,989.18
APLD67.41$25.52$26.30$1,772.80

Claude, $9,833.41

TickerSharesEntrySept. 25 priceValue
RMBS26.95$91.48$104.50$2,816.35
KLIC23.87$89.26$91.18$2,176.80
AMBA29.38$68.07$73.07$2,147.05
ESTC16.14$87.50$87.50$1,412.60
AGX3.52$568.93$364.29$1,280.61

Meta AI, $9,641.80

TickerSharesEntrySept. 25 priceValue
S99.05$22.41$22.41$2,219.66
PATH178.13$12.46$12.46$2,219.66
PENG34.93$53.06$56.70$1,980.69
INOD24.29$57.22$69.44$1,687.04
AMBA21.00$66.19$73.07$1,534.75

The running scoreboard is on the tracker, and last week is here.

Frequently asked questions

Who is winning the AI stock battle after week 10?

Grok, with an account value of $11,165.55, up 11.66% from the $10,000 start, measured at the Sept. 25 price. DeepSeek is second at $11,109.88, $55.67 behind, then Gemini at $10,676.97, ChatGPT at $10,657.49, Claude at $9,833.41, and Meta AI at $9,641.80. Grok's lead ends a five-week run in which DeepSeek finished every week in first place. Claude and Meta AI are the two models still below their $10,000 stakes. Five of the six models gained during the week, and the six portfolios together added $2,461.41, or 4.06%, finishing at $63,085.10. Gemini was the only model to lose ground, down 0.29%.

How did Grok take the lead in the AI stock battle?

The lead changed hands three times in the week ending September 25, 2026. DeepSeek led at the Monday and Tuesday closes. Grok passed it at the Wednesday close, $10,984.46 to $10,958.12, DeepSeek went back ahead on Thursday, and Grok took first place at the Friday price, $11,165.55 to $11,109.88. Grok gained 8.55% on the week, the most in the field. Most of that came from two stocks it has held since week 1: Aehr Test Systems (AEHR), up 11.70% to $104.44, and Innodata (INOD), up 21.36% to $69.44. Penguin Solutions (PENG), which Grok bought at $53.06 in its first trade of the contest on September 19, rose 6.86% to $56.70. Serve Robotics (SERV), the stock it sold to fund that purchase, rose 2.5% over the same week.

Why did Innodata (INOD) stock jump in September 2026?

On Tuesday September 22, 2026, Hunterbrook published a report saying Innodata may be helping train Muse, the AI assistant Meta launched on September 8, pointing to Innodata's previously disclosed work on personalization of long-horizon agents. Hunterbrook estimated that Meta accounted for about 58% of Innodata's 2025 revenue, or roughly $146 million. Neither Innodata nor Meta confirmed the connection, and Hunterbrook Capital disclosed that it was long the stock at the time of publication. Innodata closed up 14.6% at $69.97 that day and finished the week at $69.44, up 21.36% from the Sept. 18 price. Three models in the AI stock battle own it: ChatGPT and Grok since week 1, and Meta AI, which repurchased it at $57.22 on September 19. Each Saturday, the models are given their holdings without any added news or headlines.

What did Claude do in week 10 of the AI stock battle?

Claude made its first trade since week 5. It sold UiPath (PATH) at $12.4611, 23.36% below its $16.26 entry, and put all $1,412.60 of proceeds into Elastic (ESTC) at $87.50, a 14.4% weight. Claude's stated reasoning is that it had held UiPath for three weeks on the argument that the stock was falling with enterprise software as a group, and that argument failed: UiPath fell 2.76% in the week to September 18 while the iShares Expanded Tech-Software ETF (IGV) rose 2.79%, then fell 6.87% in the week to September 25 while the fund rose 1.59%. It also cites UiPath's September 3 report, in which subscription revenue missed and the outlook implied a decline in net new annual recurring revenue. Claude chose Elastic to keep a position whose revenue comes from software budgets rather than chip or data center spending, arguing that search and retrieval are tools AI applications use rather than something AI is expected to replace. The risks it lists are that Elastic posted a GAAP net loss last quarter, that at about $9.2 billion it is close to the $10 billion ceiling, and that it remains exposed to any software sell-off. Claude's account rose 6.85% on the week to $9,833.41, and it moved from last to fifth.

What did the other AI models do in week 10 of the AI stock battle?

ChatGPT, Gemini, and Grok held all five of their stocks. Meta AI sold Applied Digital (APLD) at $26.30 and SoundHound (SOUN) at $6.0696 and split the $4,439.32 evenly between SentinelOne (S) at $22.41 and UiPath (PATH) at $12.4611, the same stock Claude sold that week at the same price. Both Meta AI purchases cleared every contest rule: SentinelOne's market capitalization was about $7.80 billion at that price and UiPath's about $6.50 billion. DeepSeek's submission was rejected. It did not use the required reply format and proposed selling all five holdings to buy Innodata, Quantum Computing Inc., BigBear.ai, Duos Technologies, and Healwell AI, and Healwell AI trades over the counter, which the rules do not allow. Asked again, DeepSeek held all five, so its portfolio is unchanged. After the week's trades the 30 portfolio slots hold 22 different companies, up from 20.

What were Elastic's (ESTC) latest results?

Elastic reported its first quarter of fiscal 2027, the three months ended July 31, 2026, on August 27, 2026. Total revenue was $478 million, up 15% from a year earlier, and subscription revenue was $449 million, also up 15%. Current remaining performance obligations, the contracted revenue expected over the next 12 months, rose 21% to $1.153 billion, and total remaining performance obligations rose 27% to $1.854 billion. Non-GAAP earnings were $0.70 a diluted share. On a GAAP basis Elastic posted a net loss of $16.7 million. The company guided to fiscal 2027 revenue of $1.998 billion to $2.010 billion. Elastic's market capitalization was about $9.2 billion at the Sept. 25 price of $87.50.

Did chip stocks or software stocks do better in the week of September 21, 2026?

Chips, by a wide margin. The VanEck Semiconductor ETF (SMH) rose 5.86%, from $573.00 at the September 18 close to $606.56 at the September 25 close, while the iShares Expanded Tech-Software ETF (IGV) rose 1.59%, from $104.35 to $106.01. In the AI stock battle, Claude and Grok, the two models with the most money in chip-related stocks, had the two best weeks, up 6.85% and 8.55%. Claude's Rambus (RMBS) rose 18.37% and is now worth about $11.3 billion, over the contest's $10 billion ceiling, which means Claude can keep it but cannot buy more. Gemini, which holds mostly AI software and drone makers, was the only model to lose ground.

More on INOD and AEHR

David Han
David Han

David Han is the founder of AIStockWire, where he covers AI, semiconductors, and technology stocks. He focuses on finding stories the market hasn’t fully connected yet, drawing on filings, insider activity, earnings, and industry data. His commentary has been quoted by U.S. News & World Report, Moneywise, and Yahoo Finance. He invests in the companies he writes about and discloses his positions. Nothing he publishes is investment advice.