---
title: "GPT-5.6 Luna vs GPT-5.6 Terra | OpenRA arena run | Evals by Jetty"
url: https://evaljetty.com/openra/runs/r2-rr-gpt56terra-gpt56luna-g4.html
description: "GPT-5.6 Terra 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-gpt56terra-gpt56luna-g4

# GPT-5.6 Luna vs GPT-5.6 Terra

GPT-5.6 Terra destroyed the enemy base after 6.1 game-minutes · 7.8 min wall clock

Jetty run 07fd5299
[Replay (.orarep)](https://evaljetty.com/openra/media/r2-rr-gpt56terra-gpt56luna-g4.orarep)
[Decision log](https://evaljetty.com/openra/runs/r2-rr-gpt56terra-gpt56luna-g4/decisions.jsonl)
[Runtime config](https://evaljetty.com/openra/runs/r2-rr-gpt56terra-gpt56luna-g4/runtime_config.json)[Validation report](https://evaljetty.com/openra/runs/r2-rr-gpt56terra-gpt56luna-g4/validation_report.json)

LOSS germany · west

GPT-5.6 Luna

openai/gpt-5.6-luna

Value destroyed$3,100Value lost$10,800
Units killed / lost18 / 17Buildings killed / lost1 / 6
Peak army$1,900Orders issued92
Decision turns (failed)46 (0)Mean latency3.1sModel cost$0.036

WIN france · east

GPT-5.6 Terra

openai/gpt-5.6-terra

Value destroyed$10,800Value lost$3,100
Units killed / lost17 / 18Buildings killed / lost6 / 1
Peak army$4,000Orders issued55
Decision turns (failed)46 (0)Mean latency3.3sModel cost$0.320

## Evaluation

passchecks **10/10** verdict computed from the gating checks

| Status | Kind | Check | Detail |
| --- | --- | --- | --- |
| pass | step | environment | Environment check (snapshot, engine, content, key) |
| 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 | step | notes | Append Notes to summary.md |
| pass | code\_check | outputs-exist | all present |
| pass | code\_check | game-has-winner | gpt56terra won: base destroyed |
| pass | code\_check | decisions-logged | turns per slot: {'Multi0': 46, 'Multi1': 46} |
| pass | code\_check | llm-turns-valid | failed/total per slot: {'Multi0': '0/46', 'Multi1': '0/46'} |
| pass | code\_check | video-decodes | duration 63.2s |
| pass | code\_check | video-complete | video ends at tick 9171 of 9171 |
| pass | code\_check | limits-respected | ended after 7.8 wall-minutes (budget 30.0 min): base destroyed |
| pass | checklist | notes-explain-win | Notes section explains GPT-5.6 Terra win by base destruction, citing both models final thoughts and economic strategy |
| pass | checklist | players-match-request | result.json shows gpt56luna as Multi0 (west) and gpt56terra as Multi1 (east), matching the requested parameters |
| pass | checklist | no-silent-outage | run.log shows continuous decision turns from tick 201 to 9001 with zero LLM failures for either model across 46 calls each |

## 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-5.6 Luna**: Deploy the MCV immediately to establish the Construction Yard, then begin the standard power-and-economy opening.
- **0:00 GPT-5.6 Terra**: Deploy immediately and establish the standard Allied economic opening with power first.
- **0:08 GPT-5.6 Luna**: MCV is deploying at the eastern start. Begin power production, then establish ore income with a refinery and barracks/war factory while scouting west toward the likely enemy base.
- **0:08 GPT-5.6 Terra**: Construction Yard is deployed and the first Power Plant is under construction. I will place it as soon as ready, then immediately expand into refinery and barracks production.
- **0:16 GPT-5.6 Luna**: Place the completed power plant, then start an ore refinery immediately. After the refinery, establish barracks and war factory production while expanding west toward the likely enemy base.
- **0:16 GPT-5.6 Terra**: Construction Yard is deployed and the economy needs immediate power followed by ore income. Start the first power plant now.
- **0:24 GPT-5.6 Luna**: Deploy the MCV, place the ready power plant, then start an ore refinery immediately. With no units yet, prioritize economy and a barracks next for scouting and defense.
- **0:24 GPT-5.6 Terra**: Construction Yard is deployed with the first power plant ready. Place it immediately and start the first refinery to establish income.
- **0:32 GPT-5.6 Luna**: The refinery is still under construction and the base has adequate power, so I will let it finish before placing it and starting the next production building.
- **0:32 GPT-5.6 Terra**: Construction Yard and initial power are established. Start the first refinery immediately to unlock income, then expand into infantry and vehicle production.
- **0:40 GPT-5.6 Luna**: The refinery is still under construction and no units are available yet. Keep the economy queue progressing; place the refinery as soon as it finishes, then start a barracks and scout west.
- **0:40 GPT-5.6 Terra**: First refinery is still constructing. Preserve cash for immediate placement and follow with barracks, then expand into vehicle production.
- **0:48 GPT-5.6 Luna**: The refinery is still under construction at 70%; wait for completion, then place it near the ore field and immediately start an Allied Barracks. No army exists yet, so scouting begins after infantry production starts.
- **0:48 GPT-5.6 Terra**: The first refinery is still under construction, so I will preserve cash and place it immediately next update. Then I will establish infantry production and expand ore income.
- **0:56 GPT-5.6 Luna**: Refinery is nearly complete; place it immediately, then add a barracks for infantry and scouting. Keep the construction queue active and begin exploring toward the likely enemy start once units are available.
- **0:56 GPT-5.6 Terra**: Ore Refinery is nearly complete; place it immediately next turn and establish infantry production. Maintain a strong economy before transitioning to a War Factory.
- **1:04 GPT-5.6 Luna**: Place the ready refinery to begin income, then continue barracks production. With no army yet, establish infantry production immediately and follow with a war factory once the barracks is placed.
- **1:04 GPT-5.6 Terra**: Ore Refinery is seconds from completion; place it immediately next update, then establish infantry production and expand harvesting.
- **1:12 GPT-5.6 Luna**: Barracks is nearly complete; wait for it to finish, then place it and begin infantry production. Economy and power are healthy, so the next priority is a War Factory and scouting west toward the likely enemy start.
- **1:12 GPT-5.6 Terra**: Opening refinery is ready; place it immediately to start income, then establish infantry production. We have ample cash for a fast second refinery afterward.
- **1:20 GPT-5.6 Luna**: Deploy the ready barracks and start infantry production while the power plant finishes. Use the infantry to scout toward the likely enemy base at (12,16), then build a War Factory as soon as the building queue is free.
- **1:20 GPT-5.6 Terra**: Barracks is still constructing and the ore truck is actively mining. I will preserve cash for the immediate second refinery/war factory transition once the barracks is placed.
- **1:28 GPT-5.6 Luna**: Place the ready power plant and establish the barracks, then start a War Factory. Queue infantry to scout northwest toward the likely enemy base while transitioning to tanks.
- **1:28 GPT-5.6 Terra**: Barracks is ready, so establish infantry production immediately while adding a second refinery for stronger income. Scouts will head east toward the likely enemy base.
- **1:36 GPT-5.6 Luna**: War Factory is under construction and infantry production is active. Send the current riflemen northwest to scout toward the likely enemy base, then maintain infantry production and add a second refinery once the War Factory completes.
- **1:36 GPT-5.6 Terra**: Second refinery is under construction; use the barracks immediately to establish scouting and early anti-vehicle infantry while preserving funds for a War Factory next.
- **1:44 GPT-5.6 Luna**: War Factory is under construction and the refinery is queued next, while rifle production is active. Push the rifle group northwest to scout and locate the enemy, then add rocket soldiers to prepare for vehicles.
- **1:44 GPT-5.6 Terra**: Second refinery is nearing completion; expand economy immediately, then start the War Factory. Scout east toward the likely enemy base with the available rifleman while infantry production continues.
- **1:52 GPT-5.6 Luna**: The War Factory and second Refinery are nearly online, while the rifle scout continues toward the likely enemy base. Keep infantry production active and push the scouting group northwest to reveal and pressure the enemy.
- **1:52 GPT-5.6 Terra**: Second refinery is nearly ready and will strengthen the economy; immediately follow it with a war factory. Continue scouting northeast toward the likely enemy base while building a mixed infantry screen.
- **2:00 GPT-5.6 Luna**: The War Factory and second Refinery are still under construction, while the infantry scout group is already advancing west toward the likely enemy start. Keep the army moving toward (12,16) and let the queued rocket soldiers complete before adding more orders.
- **2:00 GPT-5.6 Terra**: Second refinery is nearly complete, which will fund the war factory and sustained vehicle production. Continue scouting northeast toward the likely enemy base while infantry production fills out the early force.
- **2:08 GPT-5.6 Luna**: The army is advancing west toward the likely enemy start, while the War Factory is nearly complete and a second refinery is queued. Keep rocket production running and push the infantry group toward (12,16).
- **2:08 GPT-5.6 Terra**: Second refinery is ready and should be placed immediately for stronger income. Power will be needed before a War Factory, while scouts continue probing toward the enemy start.
- **2:16 GPT-5.6 Luna**: War Factory is nearly complete and the second Refinery follows it. Keep rocket production running and push the scattered army toward the likely enemy base at the northwest; regrouping on the way is preferable to idling.
- **2:16 GPT-5.6 Terra**: Second refinery is online and the ready power plant should be placed immediately to support a War Factory. Rocket scouts will continue east toward the likely enemy base while infantry production stays queued.
- **2:24 GPT-5.6 Luna**: The army is advancing west and has a weak enemy rocket soldier in sight. Keep pressure toward the likely enemy base while the War Factory and second Refinery complete; continue rocket production if funds permit.
- **2:24 GPT-5.6 Terra**: War Factory is under construction and both refineries are operating. Our forward infantry has encountered enemy scouts; consolidate the force and push east while keeping production queues occupied.
- **2:32 GPT-5.6 Luna**: Place the ready War Factory near the base and set its rally west. Keep infantry and rocket production active while the army continues scouting toward the likely enemy base at (12,16).
- **2:32 GPT-5.6 Terra**: War Factory is nearly complete and power is ample. Keep riflemen probing east toward the enemy while income funds tanks and a third refinery.
- **2:40 GPT-5.6 Luna**: The army is pushing west and has spotted a damaged enemy rifleman near the likely base. Place the ready refinery to improve income, keep the harvester mining, and continue the attack toward the enemy start while production remains queued.
- **2:40 GPT-5.6 Terra**: War Factory is still under construction and all available funds are committed. Our forward rifles have encountered enemy infantry, so they should eliminate them while harvesters continue mining.
- **2:48 GPT-5.6 Luna**: The second refinery is nearly complete, while the tank and rocket queues remain active. Push the scattered army toward the likely enemy base at the western start and keep rocket production going; place the refinery once it becomes ready.
- **2:48 GPT-5.6 Terra**: War Factory is still constructing and infantry production is queued. Eliminate the nearby wounded scout, rally infantry eastward, and keep current harvesters mining for immediate vehicle production once the factory is placed.
- **2:56 GPT-5.6 Luna**: The enemy power plant at (19,14) confirms the base direction. Keep the advancing army focused on it while the refinery finishes; continue rocket production and let the war factory stream light tanks toward the western rally point.
- **2:56 GPT-5.6 Terra**: War Factory is nearing completion while income remains extremely tight. Clear the nearby enemy infantry and keep the rifle queue cycling as ore arrives.
- **3:04 GPT-5.6 Luna**: Enemy is confirmed near (19,14); keep the surviving infantry and rockets pressing that position while production queues continue. The second refinery is still under construction, so preserve cash for it and keep the harvester mining.
- **3:04 GPT-5.6 Terra**: War Factory is nearing completion while cash is fully committed to infantry production. Eliminate the nearby enemy scout and keep the rifles positioned to protect the base until vehicles can be produced.
- **3:12 GPT-5.6 Luna**: Cash is empty but the refinery is nearly complete and production queues are active. Continue pushing the western attack group toward the suspected enemy base while maintaining tank and rocket production.
- **3:12 GPT-5.6 Terra**: War Factory is nearly ready; I will place it immediately next turn and begin Medium Tank production. Our infantry will scout eastward while the economy continues mining.
- **3:20 GPT-5.6 Luna**: The economy is currently cash-starved, but the second refinery is progressing and production queues are already saturated. Push the scattered rocket troops west toward the suspected enemy base while continuing tank production and setting a forward rally.
- **3:20 GPT-5.6 Terra**: War Factory is nearly complete; place it immediately when ready and begin medium tank production. Our infantry scout should continue east toward the expected enemy base while the economy funds a third refinery.
- **3:28 GPT-5.6 Luna**: Cash is empty, so keep the existing tank and rocket queues running while the refinery completes. The lone rocket soldier will scout and pressure the suspected enemy base near (19,14); rally new forces west for a mass attack.
- **3:28 GPT-5.6 Terra**: War Factory is nearly ready and the refinery is queued behind it. Keep infantry advancing to locate the enemy while production finishes, then place the factory immediately next turn and start armored production.
- **3:36 GPT-5.6 Luna**: Cash is empty, so let the refinery and active queues finish. Send the lone rocket soldier west to scout toward the suspected enemy base, while keeping production rallies directed west for the incoming tanks and rockets.
- **3:36 GPT-5.6 Terra**: War Factory is ready; place it and immediately add power to support vehicle production. Infantry will continue scouting east toward the likely enemy base while the economy supports a tank force.
- **3:44 GPT-5.6 Luna**: Cash is exhausted but the refinery is nearly complete and production queues are full. Continue scouting toward the suspected enemy base while the new tanks and rocket soldiers assemble; keep the harvester mining.
- **3:44 GPT-5.6 Terra**: Power plant is still building and the refinery is queued behind it; cash is exhausted, so maintain scouting pressure and prepare production rallies eastward. Our forward infantry should continue probing toward the likely enemy base while the rocket soldier catches up.
- **3:52 GPT-5.6 Luna**: Cash is exhausted but the refinery construction and heavily queued tank/rocket production should restore momentum. Keep the harvester mining, rally both production buildings west, and send any newly produced army toward the likely enemy base.
- **3:52 GPT-5.6 Terra**: Power plant is nearly complete and must be placed immediately when ready to restore production. Our scattered infantry should continue advancing toward the likely enemy base while harvesters keep mining.
- **4:00 GPT-5.6 Luna**: The second refinery is still under construction and cash is exhausted, so the priority is to place it as soon as ready and keep existing tank/rocket queues active. No army is available yet; production rallies remain pointed west toward the likely enemy base.
- **4:00 GPT-5.6 Terra**: Power is ready and must be placed immediately to restore full production. Our forward infantry are nearing the likely enemy approach, so keep them advancing while replacing losses with vehicles and infantry.
- **4:08 GPT-5.6 Luna**: The refinery is nearly complete and will improve income; keep the packed tank and rocket queues running. Send the lone rocket soldier west to scout toward the likely enemy base while new units rally in that direction.
- **4:08 GPT-5.6 Terra**: Third refinery and tank production are underway, while dispersed infantry are scouting east toward the likely Soviet start. I will keep rallies pointed east and consolidate combat units into an advancing force without exposing harvesters.
- **4:16 GPT-5.6 Luna**: The damaged rocket soldier is near an enemy rifleman; finish that threat while the nearly completed refinery restores income. Keep production queues running and rally new units west toward the likely enemy base.
- **4:16 GPT-5.6 Terra**: Our forward scouts are at the likely enemy start and should eliminate the exposed rocket soldier while continuing to probe for structures. Keep the two ore trucks mining and preserve the badly damaged rifle by withdrawing it to base; queued refinery and tanks will strengthen the economy and army shortly.
- **4:24 GPT-5.6 Luna**: Cash is exhausted, but the second refinery is nearly complete and all infantry/tank queues are active. Keep the harvester mining, finish the refinery, and rely on the queued rocket soldiers and tanks to defend against the nearby infantry.
- **4:24 GPT-5.6 Terra**: Forward infantry are at the enemy ore refinery and should destroy it while the enemy harvester is exposed. Keep the damaged rifle retreating and send rockets toward the enemy base; refinery and tank production will complete shortly.
- **4:32 GPT-5.6 Luna**: Cash is empty, but the refinery is nearly complete and both combat queues are active. Keep the harvester mining and let the queued rocket soldiers and tanks form a defense against the infantry pressure.
- **4:32 GPT-5.6 Terra**: Our forward infantry are at the exposed enemy refinery and should finish it while the incoming tank and rockets reinforce. Two refineries and two light tanks are underway; preserve momentum and keep scouting toward the enemy start.
- **4:40 GPT-5.6 Luna**: The refinery is still building and cash is empty, so preserve the economy while the existing tank and rocket queues continue. Send the light tank to clear the enemy infantry near the base approach, and keep the harvester mining.
- **4:40 GPT-5.6 Terra**: Our eastern infantry group is on the enemy refinery and should finish it while the incoming tank/rockets reinforce. Refinery production is underway; keep pressure on the exposed enemy economy and rally all production east.
- **4:48 GPT-5.6 Luna**: The enemy infantry is pressing near the base, but the tank should engage them while staying mobile. Refinery construction is nearly complete; preserve the economy and let queued units finish.
- **4:48 GPT-5.6 Terra**: Our eastern infantry force can finish the exposed enemy refinery while the light tank screens nearby. Keep both harvesters mining and send central reinforcements toward the enemy start.
- **4:56 GPT-5.6 Luna**: Enemy raiders are directly beside the base. The light tank should finish the critically damaged infantry while queued rocket soldiers arrive; avoid exposing it to the enemy tank alone. Keep the harvester mining and let the refinery and existing rocket queue complete.
- **4:56 GPT-5.6 Terra**: Our forward force is at the enemy start and should eliminate the damaged enemy tank and any remaining base structures. A refinery is almost complete, and the light tank is nearing completion; keep pressure east while central units reinforce.
- **5:04 GPT-5.6 Luna**: The enemy is pressing the base with infantry, a rocket soldier, and a tank, while our only combat unit appears lost. The refinery is halfway through construction; keep the queues producing rockets and tanks, repair the damaged power plant, and add a defensive pillbox near the eastern approach.
- **5:04 GPT-5.6 Terra**: Our forward force is inside the enemy start area and their exposed power plant is critically damaged. Keep every combat unit focused on finishing it and sweep the surrounding base while the refinery and tank complete.
- **5:12 GPT-5.6 Luna**: The enemy is pressing directly beside the base, but rocket and tank production is already queued. Keep the refinery building, send the harvester back to ore, and rally all new units toward the enemy cluster for an immediate counterattack.
- **5:12 GPT-5.6 Terra**: Our forward force is on top of the enemy Construction Yard and should finish it immediately while the new refinery is deployed to unlock income. Reinforce the attack with the rear light tank and keep production/rallies aimed at the enemy base.
- **5:20 GPT-5.6 Luna**: The base is under immediate attack, but no combat units are currently available and cash is empty. Keep the refinery and construction yard alive, send the damaged ore truck mining, and let the existing tank/rocket queues produce defenders as income arrives.
- **5:20 GPT-5.6 Terra**: The enemy Construction Yard is exposed and damaged, with our forward infantry, rockets, and tank already surrounding it. Focus all forward forces on destroying it while the rear tank advances to reinforce.
- **5:28 GPT-5.6 Luna**: Our economy is stalled at zero cash while the refinery is halfway through construction; the full harvester must return as soon as possible. Enemy troops are pressing the damaged Construction Yard, so continue repairs and keep the existing defensive/production queues active until the refinery can be placed.
- **5:28 GPT-5.6 Terra**: Enemy Construction Yard is critically damaged and our forward force is surrounding it. Focus all available tanks and infantry on #121 for the immediate win while the next Light Tank completes.
- **5:36 GPT-5.6 Luna**: Our base is critically exposed: the only harvester is badly damaged and the enemy tank is beside the base. Keep the harvester away from the tank while repairing the damaged Construction Yard and War Factory; production queues can resume once ore arrives.
- **5:36 GPT-5.6 Terra**: Our forward force is already inside the enemy start area and can eliminate the visible power plant while the third tank joins from home. The fourth refinery is nearing completion, after which we should expand vehicle production and maintain the pressure on the exposed base.
- **5:44 GPT-5.6 Luna**: The base is critically crippled: no power, no refinery, and the Construction Yard is gone. Retreat the nearly destroyed full harvester away from the two enemy tanks while the repaired War Factory and existing queues try to recover.
- **5:44 GPT-5.6 Terra**: Our forward force is inside the enemy start area and should immediately sweep for remaining structures while the reinforcing tank closes in. The fourth refinery is nearly complete, which will support renewed tank production shortly.
- **5:52 GPT-5.6 Luna**: The base is being overrun and the harvester is nearly destroyed, but it may still escape with its ore. Preserve it by retreating southeast; keep the damaged War Factory repairing and hope the queued rocket soldiers can emerge before the enemy finishes the base.
- **5:52 GPT-5.6 Terra**: Our forward force is inside the enemy base and their War Factory is badly damaged. Finish the visible production buildings immediately while the refinery completes, then add a Service Depot to unlock stronger armor.
- **6:00 GPT-5.6 Luna**: The base is effectively destroyed: there is no MCV, refinery, power, harvester, or army, while enemy units are inside the base. I will keep the barracks producing cheap infantry and repair it, though recovery is unlikely without income.
- **6:00 GPT-5.6 Terra**: Our strike force is inside the exposed enemy base and only their damaged barracks remains visible. Place the fourth refinery to sustain production, begin the Service Depot path toward stronger armor, and focus all nearby combat units on the barracks.

---
Source: https://evaljetty.com/openra/runs/r2-rr-gpt56terra-gpt56luna-g4.html · Evals by Jetty · Run your own evals: https://jetty.io/?utm_source=evaljetty&utm_medium=llms