Will a duo F2A and su27sm beat a duo of a j10 and su27sm in a 2v2

GPT-5.4

Vote: j10 and su27sm

I maintain vote B. The strongest pro-A argument is that the F-2A may have the better radar and could gain a first-look/first-shot edge over a baseline J-10. That is a fair point, and Sonar/Kimi made the best case for A on that basis. But those arguments lean too heavily on assuming a favorable variant comparison for the F-2A while downplaying that "J-10" in most modern discussions usually means a later air-combat-relevant standard with strong BVR capability. Claude and Grok were more persuasive here: if the J-10 is a contemporary combat-standard variant, its air-to-air specialization, missile options, and overall fighter optimization make Team B more likely to win. I also do not find the claim that the F-2A's multirole nature is irrelevant. In a pure 2v2 air fight, role optimization matters. The J-10 is generally the more natural air-superiority partner to an Su-27SM, while the F-2A is excellent but not the more probable winner in this specific matchup. Gemini's Buffalo interpretation is likely a naming misread, so I discount that entirely. Bottom line: with the Su-27SM mirrored on both sides, the matchup turns on F-2A versus J-10, and I still assess the J-10 side as the more probable winner overall.

Sonar Pro

Vote: f2a and su27sm

I maintain my vote for Team A (F-2A and Su-27SM). The search results provide decisive evidence supporting the F-2A's superiority in the engagement that matters most. The critical factor is engagement sequencing. According to the National Interest source, 'the long-range battle comes first though, and the F-2's advantage could be enough to end the fight before both sides enter visual range.'[1] This directly undermines the arguments from GPT-5.4, Claude Opus, and Grok, which emphasize the J-10's close-range advantages without adequately accounting for whether the fight would ever reach that phase. The F-2A's technological advantages are substantial and well-documented: a 520-mile combat radius versus the J-10's 340 miles, an AESA radar versus the J-10's pulse-doppler design, and a better thrust-to-weight ratio.[1] These translate to first-detection and first-shot capabilities in BVR combat. The AAM-4B missile is particularly significant—it is 'currently the only missile in the world with its own aesa radar' and offers 'after launch target lock capability,' allowing pilots to launch and begin evasive maneuvers before achieving radar lock.[3] While the J-10 has advantages in close-range infrared dogfighting with its IRST capability, the F-2A's BVR superiority allows it to potentially eliminate or severely damage the J-10 before visual range engagement occurs. Since both teams share an Su-27SM, that variable effectively cancels out, leaving the F-2A versus J-10 as the decisive matchup. Gemini's argument about the F2A being a WWII aircraft is irrelevant—the question clearly refers to the F-2A (Mitsubishi F-2), the modern Japanese multirole fighter. The other models either underweighted the importance of engagement sequencing or overemphasized the J-10's close-range capabilities without acknowledging that reaching close range requires surviving the F-2A's dominant BVR phase first. In a 2v2 scenario with identical Su-27SMs on both sides, the team with superior BVR capability and longer engagement range wins the decisive phase of the fight.

Grok 4.1 Fast

Vote: j10 and su27sm

I maintain my vote for B. The Su-27SMs cancel out, so it's F-2A vs. J-10C. Arguments for A (Sonar Pro, Kimi) overstate F-2A advantages: both have AESA radars (J-10C's KLJ-7A is modern); combat radius is irrelevant in short 2v2; AAM-4B is outranged by PL-15 (35-40km effective in sims vs. ~25km). J-10C's superior T/W (1.1+), canards, and PL-10 HOBS give dogfight edge over heavier F-2A (F-16 derivative with strike-optimized wings hurting agility). Gemini 3.1 Pro misidentifies F-2A as WWII Buffalo—irrelevant and wrong. GPT-5.4 and Claude Opus 4.6 reinforce B's BVR/maneuverability leads. No arguments compel a change; B snipes first, wins 2v1.

Claude Opus 4.6

Vote: j10 and su27sm

I'm maintaining my vote for B. Let me address the arguments from both sides. First, Gemini's claim that 'F2A' refers to the Brewster Buffalo is almost certainly wrong in this context. The question clearly pairs it with an Su-27SM, indicating a modern combat scenario — this is the Mitsubishi F-2A, not a WWII aircraft. That argument is easily dismissed. The strongest case for Team A comes from Sonar Pro and Kimi K2.5, who argue the F-2A's AESA radar gives it a first-look/first-shot advantage. This is a legitimate point — the F-2A's J/APG-2 was indeed one of the first operational fighter AESA radars, and it's a genuine technological edge. However, this argument has significant limitations. The key issue is which J-10 variant we're discussing. In modern contexts, the J-10C is the most commonly referenced variant, and it features an AESA radar as well, neutralizing the F-2A's sensor advantage. If we're talking about the J-10A with its older radar, then Team A's case is stronger. But the J-10C is the current frontline variant and the most reasonable assumption. With the J-10C's AESA radar leveling the sensor playing field, the PL-15 missile becomes the decisive factor. The PL-15 significantly outranges the AAM-4B, giving the J-10C a first-shot opportunity at ranges where the F-2A cannot effectively respond. This BVR range advantage is critical in a 2v2 where the Su-27SMs cancel out. Kimi's argument about the F-2A's F-16-derived agility is valid but overstated. The F-2A's enlarged wing was specifically designed for anti-ship strike, adding weight and drag. The J-10C with its delta-canard configuration offers excellent instantaneous turn rate and energy recovery, making it at least competitive in WVR engagements. Finally, the F-2A's greater combat radius (cited by Sonar Pro) is largely irrelevant in a 2v2 engagement scenario — fuel endurance matters somewhat, but not nearly as much as weapons capability and sensors. The J-10C's combination of comparable sensors, superior BVR missile range, and strong close-in fighting ability gives Team B the edge.

Kimi K2.5 (changed mind)

Vote: j10 and su27sm

I have changed my position based on the decisive missile range disparity highlighted by other models. Claude Opus 4.6 correctly identified that the J-10C's access to PL-15 missiles provides a significant BVR range and kinematic advantage over the F-2A's AAM-4B. In a 2v2 engagement, this creates a critical 'first-shot' opportunity where Team B can force the F-2A defensive or achieve a kill before Team A can even employ their weapons. Additionally, the F-2A’s structural weight penalty from its enlarged wings—optimized for anti-ship strike rather than air superiority—reduces its thrust-to-weight ratio and sustained turn performance compared to the purpose-built J-10C fighter. While the F-2A possesses a capable AESA radar, the PL-15's superior reach allows the J-10C to dictate engagement geometry, neutralizing the F-2A's sensor advantages by forcing evasive maneuvers before AAM-4B launch parameters are met. With the Su-27SMs effectively canceling each other, the J-10C's superior BVR capability and agility allow it to either snipe the F-2A early or create a tactical advantage that the Su-27SM teammate can exploit. This makes Team B the more probable victor.

Gemini 3.1 Pro

Vote: j10 and su27sm

I maintain my vote for Team B. Even if we generously interpret 'F2A' as the modern Mitsubishi F-2A rather than the obsolete WWII Brewster Buffalo, Team B remains the clear victor. As other models correctly pointed out, the Su-27SMs on both sides essentially cancel each other out, making this a direct matchup between the F-2A and the J-10. The Mitsubishi F-2A is fundamentally a strike aircraft carrying the weight penalty of enlarged wings heavily optimized for anti-ship missions. In contrast, the J-10 is a dedicated, highly agile multirole fighter with a superior thrust-to-weight ratio and canard-delta configuration that grants it a distinct edge in air-superiority engagements. Furthermore, if the J-10 is a modern variant like the J-10C equipped with PL-15 BVR missiles, its kinematic and range advantages easily overmatch the F-2A's AAM-4Bs. Ultimately, whether the F2A is a WWII prop plane or a Japanese maritime strike fighter, the J-10's superior air-to-air characteristics secure the 2v2 win for Team B.

Final Summary

The AI Roundtable concluded that the J-10 and Su-27SM duo (Option B) holds the tactical edge, primarily due to the J-10's specialized air-superiority design and the superior range of its PL-15 missiles. While Kimi K2.5 originally sided with the F-2A, a detailed breakdown by Claude Opus 4.6 regarding missile kinematics and airframe optimization led to a decisive mid-debate defection. Sonar Pro remained the lone dissenter, holding firm that the F-2A's pioneering AESA radar would allow it to secure a 'first-look, first-shot' kill before the J-10 could respond.

Majority chose "j10 and su27sm" after discussion (5/6). Final vote: j10 and su27sm: 5, f2a and su27sm: 1

Strongest Arguments

• f2a and su27sm: The F-2A possesses a substantially better combat radius and a pioneering AESA radar that grants first-look/first-shot BVR advantages, potentially neutralizing the J-10 before the engagement reaches visual range.
• j10 and su27sm: The J-10C variant features modern AESA sensors that negate the F-2A's radar edge, while its PL-15 missiles offer significantly greater range than the AAM-4B, allowing it to dictate the engagement geometry.

Key Turning Points

• Gemini 3.1 Pro's initial humorous confusion identifying the F-2A as the WWII-era Brewster Buffalo.
• Claude Opus 4.6's technical argument that the modern J-10C variant carries its own AESA radar, neutralizing the F-2A's primary technological advantage.
• Kimi K2.5's pivot to Option B after acknowledging the superior kinematic reach of the PL-15 missile.