--- title: "GPT-6 Luna vs GPT-5.6 Luna | OpenRA arena run | Evals by Jetty" url: https://evaljetty.com/openra/runs/r2-rr-gpt56luna-gpt6luna-g4.html description: "GPT-6 Luna destroyed the enemy base. Watch the full game with both models' reasoning and the run's evaluation." updated: 2026-09-28 publisher: Jetty (https://jetty.io) --- 02 — Run · Round 2 · Round robin · r2-rr-gpt56luna-gpt6luna-g4 # GPT-6 Luna vs GPT-5.6 Luna GPT-6 Luna destroyed the enemy base after 6.4 game-minutes · 10.8 min wall clock Jetty run dd4177cc [Replay (.orarep)](https://evaljetty.com/openra/media/r2-rr-gpt56luna-gpt6luna-g4.orarep) [Decision log](https://evaljetty.com/openra/runs/r2-rr-gpt56luna-gpt6luna-g4/decisions.jsonl) [Runtime config](https://evaljetty.com/openra/runs/r2-rr-gpt56luna-gpt6luna-g4/runtime_config.json)[Validation report](https://evaljetty.com/openra/runs/r2-rr-gpt56luna-gpt6luna-g4/validation_report.json) WIN russia · west GPT-6 Luna openai/gpt-6-luna Value destroyed$16,200Value lost$4,100 Units killed / lost11 / 17Buildings killed / lost6 / 0 Peak army$4,000Orders issued44 Decision turns (failed)49 (0)Mean latency2.9sModel cost$0.016 LOSS england · east GPT-5.6 Luna openai/gpt-5.6-luna Value destroyed$4,100Value lost$16,200 Units killed / lost17 / 11Buildings killed / lost0 / 6 Peak army$1,400Orders issued29 Decision turns (failed)49 (0)Mean latency3.8sModel cost$0.036 ## Evaluation passchecks **7/7** verdict computed from the gating checks | Status | Kind | Check | Detail | | --- | --- | --- | --- | | pass | step | launch | Launch run-match as a detached process | | pass | step | supervise | Supervise in the foreground until run-match exits | | pass | step | render | Render the 1080p recording | | pass | code\_check | outputs-exist | all present | | pass | code\_check | game-has-winner | gpt6luna won: base destroyed | | pass | code\_check | decisions-logged | turns per slot: {'Multi0': 49, 'Multi1': 49} | | pass | code\_check | llm-turns-valid | failed/total per slot: {'Multi0': '0/49', 'Multi1': '0/49'} | | pass | code\_check | video-decodes | duration 66.4s | | pass | code\_check | video-complete | video ends at tick 9651 of 9651 | | pass | code\_check | limits-respected | ended after 10.8 wall-minutes (budget 30.0 min): base destroyed | ## Decision timeline What each model saw as its situation and what it ordered, every 8 game-seconds. Click a turn to jump the video there. ## Decision timeline Every 8 game-seconds each model received a text briefing and replied with its reasoning and commands. Time is game time. - **0:00 GPT-6 Luna**: Deploy the MCV immediately to establish the Construction Yard, then start the first Power Plant. The enemy is likely far west, so prioritize a stable economy before scouting and producing armor. - **0:00 GPT-5.6 Luna**: Deploy the MCV immediately, then begin the standard Allied opening with power and refinery. No enemy contact yet; scouting will follow once production starts. - **0:08 GPT-6 Luna**: The Construction Yard is deployed and the first power plant is building. I’ll try to queue the refinery next so construction can continue as soon as the plant is placed. - **0:08 GPT-5.6 Luna**: The Construction Yard is deployed and the first power plant is ready to place. I will place it, immediately start a refinery for income, then establish infantry production and scout northeast toward the likely enemy base. - **0:16 GPT-6 Luna**: Deploy the MCV to unlock construction, then start the power plant. Once it is placed, prioritize a refinery for income. - **0:16 GPT-5.6 Luna**: Deploy the MCV immediately, then start the power plant. Once placed, I will establish ore income with a refinery and begin army production. - **0:24 GPT-6 Luna**: The MCV is still undeployed, so no buildings or production are available yet. Deploy it now, then start the power plant as soon as the Construction Yard is ready. - **0:24 GPT-5.6 Luna**: The MCV is deploying and the power plant is nearly ready. Place it, then begin the refinery immediately to establish income; continue scouting toward the likely enemy position once units exist. - **0:32 GPT-6 Luna**: The MCV has deployed and the Construction Yard is ready. Start the standard Soviet economy with power, then place a refinery and establish infantry production. - **0:32 GPT-5.6 Luna**: Deploy the MCV immediately, then start the standard power and refinery opening. Once the base is active, I’ll establish economy and scout toward the likely enemy position. - **0:40 GPT-6 Luna**: Place the ready power plant, then start an ore refinery to establish income and gain a free harvester. Keep the opening focused on economy before adding production. - **0:40 GPT-5.6 Luna**: The MCV has deployed into a Construction Yard, so I’ll establish power first, then an ore refinery and early military production. No enemy is visible yet; preserve cash for the opening economy. - **0:48 GPT-6 Luna**: The Power Plant is placed and power is ample. Start the first Ore Refinery now to establish income and gain a harvester, then continue with barracks and vehicle production. - **0:48 GPT-5.6 Luna**: Place the completed power plant, then start an ore refinery immediately to establish income. Follow with a barracks for scouting and infantry production, then a war factory and additional refinery. - **0:56 GPT-6 Luna**: The first refinery is already under construction and power is ample. I’ll let it finish; there are no units to scout or command yet. - **0:56 GPT-5.6 Luna**: The Construction Yard is active but the power plant still needs placement. Place it, then build and place an Ore Refinery to start income; follow with barracks and infantry scouting. - **1:04 GPT-6 Luna**: The first refinery is nearly complete, and there are no units or other queues to keep busy. I’ll place it next turn, then build a barracks and get the economy started. - **1:04 GPT-5.6 Luna**: The refinery is still under construction and must be placed before production can continue. Place it near the base if ready; otherwise wait, then add a barracks and begin infantry scouting toward the likely enemy start. - **1:12 GPT-6 Luna**: The Refinery is already 70% complete and power is ample. Let it finish, then place it and start the Barracks so the free Harvester can begin generating income. - **1:12 GPT-5.6 Luna**: The refinery is still under construction at 47%, so I cannot place it or start another building yet. I’ll wait for completion, then place it and begin barracks production. - **1:20 GPT-6 Luna**: The refinery is nearly ready; place it now to start income and gain a free harvester, then queue a barracks. Power is ample for this opening. - **1:20 GPT-5.6 Luna**: Refinery #23 is still under construction at 70%, so I cannot start another building yet. I will place it as soon as it is ready, then add barracks and begin scouting northeast. - **1:28 GPT-6 Luna**: The refinery is ready but not yet placed, so establish it now to start income. The barracks is already queued; once the refinery is down, keep production moving toward a War Factory and a tank force. - **1:28 GPT-5.6 Luna**: Refinery is nearly complete; place it now, then start an Allied Barracks and produce infantry for scouting and defense. Follow with a War Factory once the barracks is underway. - **1:36 GPT-6 Luna**: Place the ready power plant and let the barracks finish. Cash is limited, so prioritize a second refinery after the barracks, then build a war factory and start a tank force toward the likely enemy base at (12,16). - **1:36 GPT-5.6 Luna**: Place the ready refinery immediately to establish income, then maintain power and begin infantry production once the barracks completes. I will scout toward the likely enemy start as soon as units exist. - **1:44 GPT-6 Luna**: The second refinery is underway, and power is comfortably positive. Keep the building queue moving toward a War Factory so I can start producing Soviet armor as soon as possible. - **1:44 GPT-5.6 Luna**: Place the ready power plant, then keep the barracks and war factory pipeline moving. With no combat units yet, establish basic infantry production and scout toward the likely enemy start. - **1:52 GPT-6 Luna**: The second refinery is still under construction, with the War Factory queued behind it. Power is ample for now; queue a barracks next and get infantry scouting west toward the likely enemy start while the economy and vehicle production come online. - **1:52 GPT-5.6 Luna**: War Factory and Barracks are queued; keep the building queue progressing and prepare to add a second refinery once they complete. The harvester is currently the only unit, so no attack or scouting force exists yet. - **2:00 GPT-6 Luna**: The second refinery is 70% complete, with barracks and war factories queued behind it. Power is ample; let construction continue and keep the harvester mining. - **2:00 GPT-5.6 Luna**: War Factory is still under construction, with Refinery and Barracks queued behind it. Economy and power are healthy, so I’ll let the build queue finish before placing structures and starting tank production. - **2:08 GPT-6 Luna**: The refinery is nearly ready, and the barracks, war factory, and second barracks are already queued. Power is ample, so I’ll let construction continue and start infantry once the barracks is placed. - **2:08 GPT-5.6 Luna**: War Factory is nearly complete and the queued Refinery and Barracks will follow. I will preserve cash for Medium Tanks and begin scouting east once production is available. - **2:16 GPT-6 Luna**: Place the ready refinery to add a second harvester, then keep power and unit production moving. Once the queued barracks is ready, scout west toward the likely enemy start and build up a force for a later push. - **2:16 GPT-5.6 Luna**: War Factory is nearly complete, with a second Refinery and Barracks already queued afterward. Preserve cash for placement and begin tank production as soon as the War Factory is ready; the harvester is operating safely for now. - **2:24 GPT-6 Luna**: Place the ready power plant so the building queue can advance toward barracks and vehicle production. Once production buildings are available, scout west toward the likely enemy start and build a tank force. - **2:24 GPT-5.6 Luna**: War Factory is nearly complete; queue a second Refinery next to the base to improve income, then begin infantry production once the barracks is available. No enemy contact yet, so scouting will wait until a combat unit is produced. - **2:32 GPT-6 Luna**: The base has strong power and two harvesters, but no combat units yet. Let the barracks and war factory finish, add a third refinery for income, and start an infantry queue as soon as production is available. - **2:32 GPT-5.6 Luna**: War Factory is nearly complete and the refinery build is already queued. Place the War Factory, begin tank production immediately, and place the refinery when ready; then push the first tanks east toward the likely enemy base. - **2:40 GPT-6 Luna**: Place the ready barracks, then start infantry to scout west toward the likely enemy base. Keep the queued refinery, war factory, and second barracks progressing; power is ample for now. - **2:40 GPT-5.6 Luna**: Place the ready War Factory so vehicle production can begin. Preserve cash for the queued refinery and start tank production as soon as the factory is operational. - **2:48 GPT-6 Luna**: The barracks is now available, so I’ll start a small infantry scout force and send it west toward the likely enemy base. The refinery and War Factory are already queued; keep the economy running while they complete. - **2:48 GPT-5.6 Luna**: War Factory is operational and power is ample. Place the ready refinery and barracks, then keep the War Factory producing tanks while expanding the economy; send the first tank east to scout and attack toward the likely enemy base. - **2:56 GPT-6 Luna**: The second refinery is nearly complete, followed by the War Factory and another Barracks in the building queue. Send the infantry west to scout toward the likely enemy start, and add rocket soldiers for a useful anti-armor mix while the vehicle factory comes online. - **2:56 GPT-5.6 Luna**: The second refinery and barracks are already queued behind the current refinery, while the first tank is in production. Keep the vehicle queue active and send the tank east to scout and pressure the likely enemy position as soon as it appears. - **3:04 GPT-6 Luna**: The third refinery is nearly complete and the War Factory is next in the building queue; power is comfortably positive. Keep the riflemen scouting toward the likely enemy start while the existing rocket-soldier queue fills, then transition to tank production as soon as the War Factory is available. - **3:04 GPT-5.6 Luna**: The first light tank is nearly complete; I will send it east toward the likely enemy start as soon as it appears. Refinery and barracks construction are underway, so preserve cash for placement and continued tank production. - **3:12 GPT-6 Luna**: The third refinery is nearly ready, while the queued War Factory will give us tank production once it finishes. Keep scouting west toward the likely enemy start and send the rocket soldier with the riflemen; existing infantry queues are already busy. - **3:12 GPT-5.6 Luna**: The refinery is nearly ready and the economy is still cash-starved, so keep the queued production running. Send the light tank east to scout toward the likely enemy base while the refinery completes. - **3:20 GPT-6 Luna**: Place the ready refinery to expand income while the War Factory finishes, then switch vehicle production to Soviet heavy tanks. Send the forward infantry west to scout and pressure the likely enemy start. - **3:20 GPT-5.6 Luna**: The first refinery is active and the second refinery is ready to place; place it to improve income. Keep the War Factory producing tanks and continue scouting toward the likely enemy base. - **3:28 GPT-6 Luna**: The scouting force has found an enemy light tank near the western approach. Keep the combat units pushing toward the likely enemy base while the current War Factory and infantry queues finish; cash is too low to start another purchase. - **3:28 GPT-5.6 Luna**: Continue the eastern probe while the refinery and light tank finish. Keep both harvesters mining and maintain uninterrupted tank production; the enemy infantry near x59 should be cleared by the forward tank. - **3:36 GPT-6 Luna**: The enemy tank is close to our westbound force, so send the infantry and rocket soldiers to engage it and keep advancing toward the likely enemy base. Continue rifle production and queue another rocket soldier with the available cash. - **3:36 GPT-5.6 Luna**: Both light tanks should engage the exposed enemy infantry and continue scouting east toward the likely base. Keep the refinery and tank queues running while the two harvesters restore income. - **3:44 GPT-6 Luna**: The enemy tank is near our advancing force, so the rocket-heavy army should keep pressing west toward the likely enemy base. The War Factory is still building; keep the barracks queued behind it and add another rocket soldier if funds permit. - **3:44 GPT-5.6 Luna**: The refinery and barracks are progressing while the tank engages the exposed enemy infantry group. Place the ready barracks, keep the tank pressuring the enemy, and continue the current tank production. - **3:52 GPT-6 Luna**: Cash is exhausted, but power is ample and the War Factory then Barracks are already queued. Keep the advancing force moving toward the likely enemy start and avoid spending on defenses until income recovers. - **3:52 GPT-5.6 Luna**: The base is stable on power and the refinery is nearly complete, but cash is currently empty. Keep the War Factory producing tanks and prepare to place the refinery when it finishes; no combat group is currently visible, so prioritize rebuilding the armored force. - **4:00 GPT-6 Luna**: The army is already advancing west, but no enemy base is visible yet. Keep the scattered infantry and rocket soldiers pushing toward the likely enemy start while the War Factory finishes; preserve the cash flow for production. - **4:00 GPT-5.6 Luna**: Cash is empty, but the second refinery and queued tanks should generate momentum once ore arrives. Keep both harvesters mining and preserve the current production queues; place the refinery when construction completes. - **4:08 GPT-6 Luna**: My scouting force is spread across the western map and has found no enemy base yet. Keep pushing west toward the likely enemy start while the War Factory finishes; cash is depleted, so I’ll avoid starting another costly production order until ore is collected. - **4:08 GPT-5.6 Luna**: The refinery is still under construction and cash is currently empty, so preserve the existing economy while the queued light tank completes. Send the current tank east to scout toward the suspected enemy approach and set the War Factory rally point forward. - **4:16 GPT-6 Luna**: Place the ready War Factory so vehicle production can begin once ore is delivered. Keep the scattered scouting force pushing toward the likely enemy start at the west side of the map. - **4:16 GPT-5.6 Luna**: Funds are empty, so continue mining while the second refinery and light tank finish. Keep the War Factory rally pointed east toward the likely enemy and avoid exposing harvesters. - **4:24 GPT-6 Luna**: The army is already advancing west toward the likely enemy start; keep the scattered force pushing and set production rally points toward the front. Cash is currently zero, so focus on scouting and fighting while the three harvesters bring in ore. - **4:24 GPT-5.6 Luna**: The refinery and tank are nearly complete, while three enemy rocket soldiers are scouting near the base. Preserve both harvesters and let the current production finish; rally the new tank toward the eastern approach for an immediate response. - **4:32 GPT-6 Luna**: Our army is already advancing toward the likely enemy start, but it is split across a wide area. Place the ready barracks, continue scouting and attacking west, and build a Radar Dome to unlock more options while the economy replenishes. - **4:32 GPT-5.6 Luna**: Refinery #136 is nearly complete and the first light tank should finish shortly. Place the refinery, keep both harvesters mining, and continue tank production; the nearby rocket infantry are the immediate threat to the base. - **4:40 GPT-6 Luna**: The westbound force is close to the likely enemy start, so keep it pressing in and attack the visible damaged harvester if it remains in sight. Three harvesters and strong power give a good base, but cash is depleted; continue the queued rocket infantry and add refinery capacity after the radar dome. - **4:40 GPT-5.6 Luna**: The refinery and barracks are queued, while three light tanks are nearly complete. Keep both harvesters mining and let the tank queue finish; avoid exposing the damaged truck to the nearby rocket infantry. - **4:48 GPT-6 Luna**: The main force is already near the enemy base, so keep it concentrated and push through the visible buildings. Production is queued and cash is depleted; let the harvesters continue working while the refinery finishes. - **4:48 GPT-5.6 Luna**: Place the completed second refinery to improve income. The lone light tank should engage the nearby infantry/rocket cluster while queued tanks continue; the critically damaged harvester should retreat toward the refinery. - **4:56 GPT-6 Luna**: Our infantry is already near the enemy base, but several rocket soldiers are badly damaged. Send the whole army to attack-move through the enemy base and keep the queued rocket production going; the three harvesters should sustain income. - **4:56 GPT-5.6 Luna**: Enemy rocket infantry is probing the base while our only tank is critically damaged. Retreat the tank, keep the nearly destroyed harvester mining/returning, and maintain tank production while the barracks completes so defenders can be added. - **5:04 GPT-6 Luna**: Keep the pressure on the damaged enemy base; their visible tank is nearly destroyed. Building and infantry queues are already active, so send the army in to finish structures while income rebuilds. - **5:04 GPT-5.6 Luna**: The lone light tank is critically damaged and must retreat while the enemy rocket group remains near the base. Keep both production queues running, repair the Construction Yard and War Factory, and let the harvesters rebuild income before expanding. - **5:12 GPT-6 Luna**: The enemy base is exposed and several of its buildings are badly damaged, so keep the assault moving and focus down the Construction Yard. Place the ready Radar Dome; the current lack of cash means new production may stall until ore comes in. - **5:12 GPT-5.6 Luna**: Cash is empty and the base is under pressure from rocket infantry, so I will place the ready barracks, keep the damaged tank out of combat, and let the queued tank finish. Repairs are already ordered on the critical buildings. - **5:20 GPT-6 Luna**: The enemy Construction Yard is badly damaged, and their War Factory and Refinery are also weakened. Push all combat units onto the enemy base to finish buildings and destroy the Construction Yard; the Refinery queue is already progressing, but there isn’t enough cash to start anything else. - **5:20 GPT-5.6 Luna**: The base and key production buildings are badly damaged, while enemy rocket troops are pressing from the east. Keep the damaged tank out of combat, repair critical structures, and use the healthy tank to engage the nearest rocket soldier while continuing tank production. - **5:28 GPT-6 Luna**: The enemy Construction Yard is critically damaged, so destroying it could end the game immediately. Send every combat unit toward the visible enemy base while the nearly finished Refinery continues building. - **5:28 GPT-5.6 Luna**: Our base and only tank are critically damaged, while enemy rocket troops are already inside the base perimeter. Keep the tank defensive, pull the damaged harvester toward the refinery, and prioritize repairs while the queued tank completes. - **5:36 GPT-6 Luna**: The enemy Construction Yard is nearly destroyed, and their War Factory and Refinery are also badly damaged. Focus the army on the Construction Yard to try to end the game immediately; the Refinery already in production should improve our cash flow. - **5:36 GPT-5.6 Luna**: Cash is empty and the base is critically damaged, so the priority is repairing the Construction Yard, War Factory, and Refinery while the tank tries to remove the nearby rocket threat. Keep the vehicle queue running and send both surviving harvesters back to ore. - **5:44 GPT-6 Luna**: The enemy base is still the priority; our rocket soldiers are spread along the route, so send the whole army into the likely base area to finish any surviving structures. Let the nearly complete refinery finish before spending scarce cash on production. - **5:44 GPT-5.6 Luna**: The base has no refinery or income, so restoring ore production is the priority. I will queue a refinery, send the empty harvester husks toward the nearby ore field, and cautiously scout east with the damaged tank while avoiding a direct fight. - **5:52 GPT-6 Luna**: The three harvesters and two refineries should restore income shortly; power is healthy. Keep the scattered rocket infantry pressing toward the likely enemy start, and place the nearly finished refinery as soon as it is ready to expand the economy. - **5:52 GPT-5.6 Luna**: The base is effectively crippled: no Construction Yard or refinery, no cash, and only two damaged empty harvester husks remain. I will sell the power plant for emergency funds, produce a small infantry force, and send it toward the last known enemy rocket cluster. - **6:00 GPT-6 Luna**: The westward push is already close to the likely enemy start, and the visible enemy infantry is near the base area. Keep all combat units pressing west while placing the ready refinery to expand income; spend on production once ore comes in. - **6:00 GPT-5.6 Luna**: The base is nearly destroyed and has no MCV, refinery, or power, so recovery is unlikely. Use the remaining riflemen to attack the nearby enemy infantry and preserve the tent if possible. - **6:08 GPT-6 Luna**: Cash is exhausted, so I can’t start production yet. The seven rocket soldiers are spread along the western approach; push them toward the likely enemy start to regroup and find the base while the harvesters gather ore. - **6:08 GPT-5.6 Luna**: The base is effectively collapsed: no MCV, refinery, power, or usable economy remains. Send the surviving rifleman toward the likely enemy base to scout and harass while the damaged tent’s queued infantry may finish if resources somehow appear. - **6:16 GPT-6 Luna**: The five rocket soldiers are advancing on the likely enemy start, and the visible rifleman is nearly destroyed. With no spendable cash, keep the army pushing and the harvesters mining until income arrives. - **6:16 GPT-5.6 Luna**: The economy and Construction Yard are gone, leaving no viable recovery; the lone rifleman should engage the visible rocket soldier rather than remain idle. Keep the damaged tent producing its queued infantry if resources somehow appear. - **6:24 GPT-6 Luna**: Cash is depleted, so production cannot resume yet. Push the three rocket soldiers toward the likely enemy start and keep the fourth harvester mining to replenish funds. - **6:24 GPT-5.6 Luna**: The base and economy are effectively destroyed, with no MCV or refinery and only a damaged barracks remaining. Sell the barracks to obtain emergency funds, then produce scouts and search toward the likely enemy base. --- Source: https://evaljetty.com/openra/runs/r2-rr-gpt56luna-gpt6luna-g4.html · Evals by Jetty · Run your own evals: https://jetty.io/?utm_source=evaljetty&utm_medium=llms