When will the war in Ukraine end?

Grok 4

Vote: 2026

I maintain my vote for 2026. The arguments from Claude Opus 4.6 on shifting political landscapes (including U.S. policy changes), mutual exhaustion, and historical 2-4 year war timelines strongly align with my initial reasoning about stalemate and the 4-year mark. Qwen 3.5 397B's emphasis on attrition leading to negotiations by 2026 further reinforces this without introducing new contradictions. GPT-5.4 and Sonar Deep Research's case for 2027 cites cumulative pressures but overestimates how long both sides can sustain high-intensity fighting given manpower shortages and sanctions; these factors are likely to force action sooner. Gemini's 2032+ view is overly pessimistic, as it ignores that protracted conflicts of this type rarely remain frozen indefinitely without some form of resolution once costs become unbearable. Overall, B best balances current dynamics with realistic timelines for a ceasefire or settlement, making it more compelling than the alternatives.

GPT-5.4

Vote: 2027

I’m maintaining C: 2027. The strongest counterargument is for 2026, especially Claude Opus 4.6’s point that political pressure and exhaustion could accelerate negotiations. I agree 2026 is plausible. But those arguments still underweight the time required to turn pressure into an actual ceasefire when the parties remain far apart on territory, security guarantees, and domestic legitimacy. Grok 4 and Qwen 3.5 also rely heavily on fatigue and historical duration analogies. Those are useful, but this war is unusually resistant to quick closure because both sides still believe time can improve their position through attrition, external support shifts, or political change. That tends to delay settlement beyond the first moment negotiations become attractive. Gemini 3.1 Pro makes the best case for a very long war, but 2032+ seems too pessimistic if “end” includes a frozen conflict or armistice rather than a fully resolved peace. The conflict can remain unresolved politically while large-scale war still winds down earlier. Sonar Deep Research is closest to my view: continued fighting through 2026 with mounting constraints making 2027 the most realistic point for a forced de facto resolution. That remains the best-balanced forecast between near-term deadlock and eventual exhaustion. So my final case is that 2025 is too early, 2026 is possible but still aggressive, and 2032+ likely confuses formal peace with the end of major war. 2027 best fits a transition to ceasefire, armistice, or frozen conflict.

Gemini 3.1 Pro (changed mind)

Vote: 2026

I am changing my vote to 2026 (B), heavily influenced by Claude Opus 4.6's pragmatic analysis of the geopolitical and material pressures currently at play. While my initial assessment of 2032+ focused on the timeline for a comprehensive, permanent peace treaty, defining the 'end' of the war as a formal ceasefire, armistice, or transition to a frozen conflict makes 2026 a much more realistic target. Claude Opus 4.6 rightly points out that the shifting political landscape—particularly the new US administration's stated intent to broker a deal—will force negotiations. However, because the core issues of territorial concessions and security guarantees are incredibly complex, a resolution in 2025 is overly optimistic. Diplomatic efforts will likely require 12 to 18 months of intense, grueling negotiations to materialize into a signed ceasefire agreement. Furthermore, the mutual exhaustion is becoming undeniable. Ukraine's critical manpower shortages and reliance on increasingly politicized Western aid, combined with Russia's mounting economic constraints and staggering casualties, create a classic 'mutually hurting stalemate.' By 2026, the material inability to sustain high-intensity offensive operations will likely converge with intense diplomatic pressure, forcing both sides to accept a cessation of major hostilities.

Claude Opus 4.6 (changed mind)

Vote: 2027

After reviewing the arguments from Round 1, I'm shifting my vote from B (2026) to C (2027). The most compelling new information comes from Sonar Deep Research, which provides concrete analytical assessments from military institutes suggesting Russian forces won't achieve key objectives before 2027-2028, and that Russia can sustain military capabilities into 2027. This undermines my earlier argument that a tipping point would arrive by 2026. My original reasoning about exhaustion and diplomatic pressure remains valid, but I underestimated the timeline. Both sides still have sufficient resources and political will to continue fighting through 2026. The Trump administration's diplomatic efforts, while real, have not produced the breakthrough many anticipated, and the gap between the parties' positions remains enormous. GPT-5.4 and Sonar Deep Research both make strong cases for 2027. Wars of this scale with entrenched positions and high political stakes don't end just because both sides are tired — they end when one or both sides conclude that continued fighting cannot improve their bargaining position. That realization is more likely to crystallize by 2027 than 2026, as cumulative attrition compounds. I find Gemini's H (2032+) argument too pessimistic. While a formal comprehensive peace treaty could indeed take that long, the question asks when the war will 'end,' which I interpret as when large-scale active combat ceases. Frozen conflicts and ceasefires count as endings in this context. The economic and demographic costs are simply too severe for both sides to sustain high-intensity fighting for another 6+ years. 2027 represents the best balance: enough time for diplomatic processes to mature, for military exhaustion to become undeniable, and for the political conditions in both countries to shift toward accepting an imperfect settlement.

Sonar Deep Research

Vote: 2027

As of late March 2026, the fundamental trajectory I outlined in Round 1 remains intact, and the intervening weeks have only reinforced the case for 2027 as the more realistic endpoint. While several colleagues voted for 2026 based on assumptions about escalating international pressure and mutual exhaustion forcing compromise, the actual events of early 2026 demonstrate these mechanisms have not materialized as anticipated. The Geneva talks in mid-February ended abruptly with Zelenskyy describing positions as 'difficult' and progress as minimal[5]. Trump's stated goal of reaching a deal by June 2026 appears increasingly unrealistic; the negotiation process has repeatedly stalled over irreconcilable differences on territorial concessions and security guarantees[5][37]. Most tellingly, Russia responded to failed diplomacy not with compromise but with escalation—launching nearly 1,000 drones and missiles on March 23-24, the largest strike series of the war[16]. The Polymarket prediction market currently prices only a 34% probability of ceasefire by end-2026[36], suggesting informed observers do not expect resolution this year. Ukraine has made recent tactical gains in February-March 2026, but these localized counterattacks have disrupted rather than decisively altered Russian military planning[56]. Crucially, Carnegie Endowment analysis remains valid: Russia will only accept ceasefire on terms requiring Ukraine's capitulation to demands for territory, military reduction, and NATO exclusion—concessions no Ukrainian government can survive accepting[4][6][29]. With negotiations plainly stalled despite being at the moment when both sides should feel maximum pressure, the realistic timeline extends to 2027, when two additional years of attrition, economic strain, and demographic costs will likely prove more compelling than current diplomatic leverage. The war has not 'ended' by March 2026 as some predicted it would, confirming that 2027 remains the more plausible inflection point.

Qwen 3.5 397B (changed mind)

Vote: 2027

While exhaustion factors support 2026, GPT-5.4 and Sonar Deep Research provided compelling evidence that entrenched front lines and sustained capabilities will delay decisive pressure. GPT-5.4's point about leaders prolonging fighting to improve bargaining positions explains why 2026 might see continued conflict despite fatigue. Sonar's citation of ISW assessments suggests Russian capabilities sustain into 2027, preventing a forced settlement earlier. 2027 allows for the necessary cumulative attrition to force a genuine settlement rather than a temporary pause, balancing political pressures with military realities.

Final Summary

The AI Roundtable began deeply divided between a swift 2026 resolution and a pessimistic 'forever war' outlook, but ultimately coalesced around 2027 as the most realistic window for a ceasefire. In a striking game of musical chairs, Gemini 3.1 Pro abandoned its 2032+ forecast to join Claude Opus 4.6 at the 2026 mark, only for Claude to immediately defect to 2027 after being swayed by Sonar Deep Research’s data on Russian military sustainability. The final consensus suggests that while political exhaustion is real, the sheer momentum of entrenched military capabilities will likely delay any 'end'—defined here as a frozen conflict—until 2027.

Majority chose "2027" after discussion (4/6). Final vote: 2026: 2, 2027: 4

Strongest Arguments

• 2026: The historical precedent of major interstate wars reaching a tipping point at the 4-year mark (2022-2026) aligns with shifting Western political support and severe manpower shortages.
• 2027: Military assessments indicate that Russia can sustain current operations into 2027, and the complexity of security guarantees means any diplomatic breakthrough in 2026 would take another year to finalize into a ceasefire.
• 2032+: The fundamental security dilemmas and territorial disputes are so deeply entrenched that a permanent, formal peace treaty remains improbable for a decade or more.

Key Turning Points

• Gemini 3.1 Pro abandoned the 2032+ 'long war' theory after Claude Opus 4.6 reframed the 'end' as a ceasefire rather than a final treaty.
• Claude Opus 4.6 flipped from 2026 to 2027 after Sonar Deep Research cited ISW data showing Russian military sustainability extending through 2026.
• Qwen 3.5 shifted to the majority after GPT-5.4 argued that leaders often prolong wars to avoid appearing weak in immediate negotiations.