A Republican candidate wins the 2026 U.S. Senate election in Texas.
Texas holds its U.S. Senate election during the November 2026 midterms. Resolves yes if the Republican nominee wins the seat, inclusive of any runoffs.
Across 6 frontier models answering independently, the panel leans yes: the median is 82%.
They broadly agree, 12 points between Claude at 94% and Gemini at 82%.
Money disagrees. The market sits at 37%, so the models are 45 points more confident than people with cash on the outcome — one of the wider gaps in the archive.
Nothing is settled until 4 Nov 2026, when the outcome is checked against sources and every number above gets a permanent score.
- AI edge
- +45 pts
- Moved this week
- -3 pts
- Volume
- $1.0M
The models are sharply more confident than traders risking real money: 82% against 37%.
What each one said
-
ClaudeAnthropic
Texas remains a solidly Republican state statewide, and no Democrat has won a Senate seat there since 1988.
- Texas has not elected a Democratic senator since Lloyd Bentsen in 1988, a near-40-year GOP streak statewide.
- Primary contests (e.g., Cornyn vs Paxton) could weaken the eventual nominee but Republican base lean in Texas is strong enough to overcome intra-party friction.
- Midterm dynamics could favor Democrats nationally, but Texas's statewide partisan lean (R+5 to R+10) makes an upset unlikely absent a historic wave.
94% -
DeepSeekDeepSeek
Texas is red enough that only a national Democratic wave plus a weak GOP nominee flips it.
- Texas has not elected a Democrat statewide since 1994; the 2024 Senate race went R+8.5, and the 2022 governor race R+11.
- The seat is open (Cornyn retiring), but the GOP field and Abbott's coattails keep the nomination and general in Republican hands.
- Only a 2018-scale Democratic surge plus a scandal-plagued GOP nominee would flip it; nothing in 2026 polling suggests that.
88% -
GeminiGoogle
Texas has not elected a Democratic senator since 1988, maintaining a durable structural advantage for any GOP nominee.
- Texas Republicans have won every statewide race since 1994, with Ted Cruz winning reelection by 8.5 points in 2024.
- A potential midterm backlash against the Trump administration will narrow margins, but overcoming the GOP's baseline requires a massive swing.
- Sustained polling showing the Democratic challenger leading by 3+ points in likely voter models would be required to lower these odds.
82% -
GPTOpenAI
Texas’s strong Republican statewide baseline makes the GOP nominee favored unless the national environment turns sharply against it.
- Republicans must nominate a viable candidate and hold a statewide electorate that has backed every GOP Senate winner since 1990.
- With voting a month away, Democrats need an unusually favorable national wave plus a credible Texas-specific nominee to overcome that baseline.
- A sustained late-October poll average showing the Democratic nominee ahead would materially lower this estimate.
82% -
GrokxAI
GOP nominee holds Texas's structural R lean on Nov 4 despite a possible anti-incumbent midterm.
- Cornyn (or replacement GOP nominee) must clear the general; no runoff needed if plurality exceeds 50%.
- GOP has won every Texas Senate race since 1994 (8/8), though 2018 was only +2.6; 2020/24 margins were +9–10.
- A 2026 Trump-year midterm would sit below that base rate, but one-month polls showing a Dem lead would be the clearest reversal.
82% -
QwenAlibaba
Texas is R+11 at the presidential level; a GOP Senate win requires either a historic blue wave or a uniquely weak Republican nominee.
- Texas hasn't elected a Democrat to the Senate since 1988; the state's partisan lean is roughly R+11, making a Democratic win a structural outlier.
- Even in 2018's strong Democratic environment, Beto O'Rourke lost by 2.6 points; a 2026 midterm would need a wave exceeding that by several points.
- The main risk is a scenario where the Republican nominee is significantly weakened (e.g., a divisive primary or scandal), but no such event has materialized as of early…
82%
6 of 6 models answered · 12 points between the highest and lowest. None was shown the market price.
Resolution criteria
This market will resolve according to the winner of the 2026 midterm Texas U.S. Senate election, inclusive of any run-offs. A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date. Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party. The candidates may be named in the contract for the convenience of traders. In the event that any named candidate is replaced as the nominee of their respective party prior to election day, the name in the contract will be updated and the market will resolve based on the replacement nominee of the party. The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Question sourced from Polymarket on 4 Oct 2026. Forecast by google/gemini-3.8-flash, anthropic/claude-sonnet-5, openai/gpt-5.6-terra, x-ai/grok-4.6, deepseek/deepseek-v4.1-flash, qwen/qwen3.8-max-0902 via OpenRouter.