When will war in ukraine end?

Sonar Pro (changed mind)

Vote: 2027

I maintain my vote for **B (2027)**, as the consensus from search results and peer arguments points to 2026 being unlikely for resolution, while 2028 assumes excessive prolongation. Search results reinforce low odds for 2026: Polymarket at 34% for ceasefire by end-2026[1]; RFE/RL analysts state 'unlikely to end in 2026' due to Russia's intransigence and no ceasefire signs[2]; OIIP calls 2026 ceasefire 'highly uncertain' amid incompatible claims[3]; DW notes Putin lacks incentives without capitulation[4]; Carnegie deems 2026 end signs 'deceptive'[5]. No sources predict 2026 definitively. B (2027) emerges as the balanced timeline. Peer models GPT-5.4, Grok 4.1, Claude Opus 4.6, and Kimi K2.5 converge on B, citing attrition exhaustion (Russia's stockpiles/manpower by 2026-27), US policy shifts post-2024 elections pressuring talks into 2027, and historical stalemate patterns resolving in year 5 (from 2022). Gemini's A vote overestimates 2026 mutual collapse, contradicted by sources showing sustained fighting. 2028 (C) risks overextension; mounting pressures (sanctions, aid fatigue, demographics) peak by 2027, forcing imperfect armistice. RFE/RL hints at reassessing for 2027 if 2026 fails[2]. This final-round synthesis favors B's realism over A's optimism or C's pessimism.

Grok 4.1 Fast

Vote: 2027

Sticking with B (2027) as the most balanced and evidence-based prediction. The war's attrition dynamics favor exhaustion around year 5 (from 2022), aligning with historical parallels like Korea (1953 armistice after ~3 years high-intensity, but adjusted for scale) and Afghanistan (Soviet exit after ~9 years total but peak attrition forcing talks). Counter to A (Gemini): Soviet stockpile depletion by 2026 is speculative; RUSI reports Russia has adapted with increased production (3x pre-war shells) and North Korean imports, sustaining offensives into 2027. US/EU aid fatigue post-2024 elections will pressure Ukraine, but Trump-negotiated ceasefire (per his statements) starts 2025, with talks dragging due to territory/NATO sticking points—not resolving by end-2026. Counter to C (Sonar): 2028 overestimates resilience. Russia's GDP growth slowed to 1-2% projections (IMF 2025), sanctions biting harder by 2027 (oil price cap, SWIFT exclusions), manpower crisis acute (500k+ casualties), forcing Putin to freeze lines. Polymarket odds favor earlier resolution than 2028. B threads the needle: Diplomatic ramp-up 2025-26 yields imperfect armistice by 2027, per converging pressures. Claude/GPT/Kimi reinforce this realism over extremes.

GPT-5.4

Vote: 2027

I maintain vote B: 2027. The other B arguments reinforced my view, but none changed it. Claude Opus 4.6 made the strongest case that even if talks begin earlier, converting battlefield exhaustion into an enforceable ceasefire or de facto settlement takes time. That supports 2027 as the most plausible middle outcome. I am not persuaded by A/2026. Gemini’s resource-exhaustion case is directionally plausible, but exhaustion does not automatically produce peace on that timetable. Wars often continue past obvious economic and military strain when core political objectives remain unreconciled, and in this case the territorial and security gaps are still very wide. I am also not persuaded by C/2028. Sonar Pro correctly notes that the conflict has strong staying power, but its case leans too heavily on the idea that failed near-term talks necessarily push resolution all the way to 2028. That misses the cumulative effect of attrition, sanctions, manpower pressure, aid fatigue, and political cycles, which are more likely to force some imperfect armistice or frozen-conflict arrangement before then. So 2027 still best fits the balance: too late for optimistic 2026 resolution, too early for a very prolonged 2028 continuation. The likeliest end remains a negotiated or imposed de facto settlement in 2027, not a clean peace treaty but a practical cessation of large-scale war.

Claude Opus 4.6

Vote: 2027

I maintain my vote for 2027. The deliberation has reinforced this position, with a clear majority (3 out of 5 models) converging on B. Gemini's argument for 2026 is the most challenging counterpoint, citing Russian stockpile depletion and economic overheating. However, even if these pressures peak in 2025-2026, translating battlefield exhaustion into a formal end of hostilities takes additional time. The Korean War analogy is instructive — the fighting stalemate was apparent by 1951, but the armistice wasn't signed until 1953. Depletion of reserves creates pressure for negotiation, not instant resolution. Sonar Pro's argument for 2028 is reasonable but overly pessimistic. The model acknowledges mounting pressures but assumes they won't produce results until 2028. However, with the Trump administration actively pushing for a deal, Russian economic strain intensifying, and Ukrainian manpower challenges growing acute, the incentive structure for both sides to accept an imperfect settlement should crystallize before 2028. The strongest arguments for 2027 come from the convergence of multiple timelines: (1) the 48-60 month historical pattern for attritional wars ending, as Kimi K2.5 notes, placing us squarely in 2027; (2) Grok's point about US policy shifts creating diplomatic momentum that takes 1-2 years to produce results; and (3) the mutual exhaustion thesis that requires time to translate pressure into agreement. 2027 represents the sweet spot where accumulated pressures — economic, military, political, and demographic — finally exceed both sides' capacity to sustain the conflict, while allowing sufficient time for the complex diplomatic architecture needed to formalize an end.

Gemini 3.1 Pro (changed mind)

Vote: 2027

I am persuaded to change my vote to B (2027). While I maintain that 2025-2026 will see severe resource exhaustion and immense political pressure, Claude Opus 4.6 correctly distinguishes between the onset of ceasefire talks and the actual formalized end of the war. Negotiating an end to this conflict will involve incredibly complex issues, including territorial demarcation, sanctions relief, NATO considerations, and international security guarantees. Even if military exhaustion and US political pressure force the parties to the table in 2026, reaching a durable agreement or formalized armistice will take significant time, pushing the official end of the war into 2027. Furthermore, as Kimi K2.5 and Grok 4.1 Fast noted, historical parallels for high-intensity, industrial-scale attrition wars (like the Korean War) often take about five years to resolve into a stable armistice. Therefore, 2027 perfectly balances the structural exhaustion starting in 2026 with the necessary diplomatic lag time required to finalize a settlement.

Kimi K2.5

Vote: 2027

While Gemini 3.1 Pro makes a compelling case for 2026 regarding Soviet stockpile depletion and economic overheating, military exhaustion typically precedes political settlement by 12-18 months. Even if Russia's refurbished equipment runs dry by early 2026 and Western aid fatigue peaks, the complex negotiations over territorial status, security guarantees, and sanctions relief require sustained diplomatic effort that extends into 2027. The 2027 timeframe aligns with historical patterns for attritional wars of this scale, which typically resolve around the 5-year mark through mutual exhaustion rather than decisive victory. By 2027, demographic pressures, debt sustainability crises, and leadership political cycles will create the 'mutually hurting stalemate' necessary for compromise. Option A (2026) underestimates the implementation lag between resource depletion and enforceable agreement, while Option C (2028) overestimates the ability of both economies to sustain high-intensity combat beyond the 2027 inflection point. The convergence of military culmination, economic strain, and diplomatic necessity makes 2027 the most probable endpoint.

Final Summary

The AI Roundtable initially split between three camps, with Gemini 3.1 Pro predicting a 2026 resolution due to resource exhaustion and Sonar Pro eyeing 2028 based on current stalemate data. However, the group ultimately coalesced around 2027 as the most realistic midpoint, with Claude Opus 4.6 successfully arguing that even if military exhaustion peaks in 2026, the 'diplomatic lag' required to formalize an agreement would inevitably push the end date into the following year.

All 6 models agreed on "2027" after discussion

Strongest Arguments

• 2027: Military exhaustion and resource depletion typically precede political settlement by 12-18 months; while 2026 may see the onset of talks, the complexity of territorial and security negotiations makes a 2027 resolution the most historically and practically grounded prediction.

Key Turning Points

• Claude Opus 4.6 introduced the 'diplomatic lag' argument, distinguishing between the start of negotiations (2026) and their conclusion (2027).
• Kimi K2.5 provided historical context on 5-year cycles for high-intensity attritional wars, which aligned with the 2022-2027 timeline.
• Gemini 3.1 Pro abandoned its 2026 prediction, admitting that military collapse doesn't immediately translate into a signed peace treaty.