---
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-g2.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-g2

# GPT-5.6 Luna vs GPT-5.6 Terra

GPT-5.6 Terra destroyed the enemy base after 5.9 game-minutes · 7.7 min wall clock

Jetty run 7caea988
[Replay (.orarep)](https://evaljetty.com/openra/media/r2-rr-gpt56terra-gpt56luna-g2.orarep)
[Decision log](https://evaljetty.com/openra/runs/r2-rr-gpt56terra-gpt56luna-g2/decisions.jsonl)
[Runtime config](https://evaljetty.com/openra/runs/r2-rr-gpt56terra-gpt56luna-g2/runtime_config.json)[Validation report](https://evaljetty.com/openra/runs/r2-rr-gpt56terra-gpt56luna-g2/validation_report.json)

LOSS russia · west

GPT-5.6 Luna

openai/gpt-5.6-luna

Value destroyed$2,600Value lost$9,600
Units killed / lost20 / 15Buildings killed / lost0 / 6
Peak army$1,700Orders issued69
Decision turns (failed)45 (0)Mean latency3.2sModel cost$0.034

WIN russia · east

GPT-5.6 Terra

openai/gpt-5.6-terra

Value destroyed$9,600Value lost$2,600
Units killed / lost15 / 20Buildings killed / lost6 / 0
Peak army$4,000Orders issued84
Decision turns (failed)45 (0)Mean latency3.4sModel cost$0.322

## 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': 45, 'Multi1': 45} |
| pass | code\_check | llm-turns-valid | failed/total per slot: {'Multi0': '0/45', 'Multi1': '0/45'} |
| pass | code\_check | video-decodes | duration 60.7s |
| pass | code\_check | video-complete | video ends at tick 8801 of 8801 |
| pass | code\_check | limits-respected | ended after 7.7 wall-minutes (budget 30.0 min): base destroyed |
| pass | checklist | notes-explain-win | summary.md Notes section cites final thoughts from both models and explains Terra won via economic dominance and base destruction |
| pass | checklist | players-match-request | result.json records gpt56luna as Multi0 and gpt56terra as Multi1 exactly as requested |
| pass | checklist | no-silent-outage | run.log shows uninterrupted decision turns with 0 LLM failures across all 45 turns per player |

## 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, then establish power and an ore refinery to start the Soviet economy.
- **0:00 GPT-5.6 Terra**: Deploy immediately and establish the standard Soviet economic opening: power, refinery, barracks, then a second refinery/war factory.
- **0:08 GPT-5.6 Luna**: Construction Yard is deployed and the first power plant is being completed. Place it, then start an ore refinery immediately to establish income; queue another power plant afterward if available.
- **0:08 GPT-5.6 Terra**: Construction Yard is deployed and the opening priority is power followed by an Ore Refinery for income.
- **0:16 GPT-5.6 Luna**: Deploy the MCV immediately, then start power production so the base can begin its economy.
- **0:16 GPT-5.6 Terra**: Construction Yard is deployed and the first power plant is ready. Place it immediately and begin the refinery to establish income.
- **0:24 GPT-5.6 Luna**: Place the ready Power Plant, then start an Ore Refinery to establish income. After the refinery is placed, build a barracks and begin scouting west toward the likely enemy base.
- **0:24 GPT-5.6 Terra**: Construction Yard and initial power are online with ample cash. Start the first refinery immediately for income, then establish infantry production and a second refinery.
- **0:32 GPT-5.6 Luna**: Deploy the MCV, place the queued power plant, then start the refinery to establish income. After that I will add barracks and scout west toward the likely enemy base.
- **0:32 GPT-5.6 Terra**: First refinery is still under construction. Preserve cash for immediate placement and start barracks as soon as the building queue opens.
- **0:40 GPT-5.6 Luna**: The refinery is still under construction, so I will let it finish before placing it and starting the barracks. No units are available yet; the immediate priority is completing the economy and infantry production.
- **0:40 GPT-5.6 Terra**: Ore Refinery is still constructing; it should complete during this interval. I will immediately follow with barracks and begin infantry pressure once production comes online.
- **0:48 GPT-5.6 Luna**: The refinery is still under construction at 47%; let it finish before placing it. No units are available yet, so conserve the remaining cash and continue the planned economy opening.
- **0:48 GPT-5.6 Terra**: First refinery is nearly complete; place it immediately next update, then establish barracks and a second refinery for sustained Soviet vehicle production.
- **0:56 GPT-5.6 Luna**: The refinery is still under construction at 70%; no units are available yet. I will wait for placement, then establish infantry production and scout west toward the enemy start.
- **0:56 GPT-5.6 Terra**: First refinery is nearly complete; place it immediately when ready, then establish infantry production and expand ore income.
- **1:04 GPT-5.6 Luna**: The refinery is nearly complete; place it as soon as ready, then build a barracks and begin scouting west toward the likely enemy start. Maintain power and spend cash on early infantry once production is available.
- **1:04 GPT-5.6 Terra**: Opening refinery is ready; place it immediately to start income, then establish barracks for early scouting and map control.
- **1:12 GPT-5.6 Luna**: Place the completed refinery now to start harvesting, then build a barracks and queue infantry for scouting and defense. The enemy is likely far west near (12,16).
- **1:12 GPT-5.6 Terra**: Barracks is nearing completion while the first refinery sustains income. I will place it as soon as ready, then immediately begin infantry scouting and expand with a second refinery.
- **1:20 GPT-5.6 Luna**: Barracks is nearly complete; keep the refinery harvesting and wait for placement, then queue a War Factory and begin scouting west with infantry.
- **1:20 GPT-5.6 Terra**: Barracks is ready and the economy can support a second refinery immediately. Train infantry scouts and send them east toward the likely enemy position while expanding production.
- **1:28 GPT-5.6 Luna**: Place the completed barracks, start infantry scouting, then queue a War Factory while economy and power are healthy. Send the first infantry west toward the likely enemy start to reveal the map.
- **1:28 GPT-5.6 Terra**: Second refinery is under construction; use the new barracks to establish infantry scouting while preserving cash for a War Factory next. Power is ample for the immediate expansion.
- **1:36 GPT-5.6 Luna**: War Factory is nearly complete and the barracks is now operational. Queue infantry for scouting and defense, then add a second refinery after the War Factory to accelerate the economy.
- **1:36 GPT-5.6 Terra**: Second refinery is under construction and infantry production is queued. I will scout east toward the expected enemy position while banking enough to start the War Factory as soon as the refinery finishes.
- **1:44 GPT-5.6 Luna**: War Factory and second Refinery are in the building queue; economy and power are currently stable. Send the three starting riflemen west to scout toward the likely enemy base, while barracks production continues and rallies forward.
- **1:44 GPT-5.6 Terra**: Second refinery is nearly ready and infantry production is queued. Continue scouting toward the likely enemy start while saving for the War Factory.
- **1:52 GPT-5.6 Luna**: The War Factory is nearly complete and the second Refinery is queued, so economy and armor production are coming online. Send the scouting rifles west toward the likely enemy start while maintaining infantry production and add rocket soldiers behind the rifle queue.
- **1:52 GPT-5.6 Terra**: Second refinery is nearly complete and should be placed immediately to expand income. I will add power for the coming War Factory while the scouting infantry continues east toward the suspected enemy base.
- **2:00 GPT-5.6 Luna**: The War Factory is nearly complete and the refinery is queued behind it. Keep the rifle scout group moving west toward the suspected enemy base while rocket soldiers finish; save resources for tanks and place the War Factory as soon as it becomes ready.
- **2:00 GPT-5.6 Terra**: Second refinery is ready and should be placed immediately for stronger income. Keep infantry production active while scouts advance toward the likely enemy base; save toward a War Factory after the current power plant completes.
- **2:08 GPT-5.6 Luna**: War Factory is nearly complete and the refinery is queued behind it, so preserve cash for expansion and tanks. Keep the scouting group moving west toward the suspected enemy while the infantry queues remain active.
- **2:08 GPT-5.6 Terra**: Second refinery is operating and the ready power plant should be placed immediately to support the upcoming War Factory. Forward scouts will continue east toward the likely enemy base while infantry production continues.
- **2:16 GPT-5.6 Luna**: The War Factory is nearly complete; place it immediately, then keep the scout force advancing west toward the likely enemy base. Barracks queues are already busy, so preserve cash for the refinery and vehicle production.
- **2:16 GPT-5.6 Terra**: Place the completed power plant and preserve the forward pressure with our infantry/rockets moving toward the likely Allied start. Income must build until we can afford the War Factory.
- **2:24 GPT-5.6 Luna**: The refinery is nearly complete and the army is scouting west toward the likely enemy base. I will attempt to place the ready War Factory, keep rocket production running, and push the surviving force toward (12,16).
- **2:24 GPT-5.6 Terra**: Our forward infantry/rocket force should continue scouting toward the enemy start while we preserve funds for a War Factory. Keep the barracks producing cheap rifles and ensure both harvesters remain mining.
- **2:32 GPT-5.6 Luna**: The refinery is still constructing and the army is scouting west toward the likely enemy start. Keep rocket production active and push the current force toward (12,16) while saving for tanks and a second harvester.
- **2:32 GPT-5.6 Terra**: We have ample power and two refineries but need preserve cash to reach a War Factory. The infantry screen should continue scouting northeast toward the likely enemy base while new infantry rally forward.
- **2:40 GPT-5.6 Luna**: The western force is advancing toward the likely enemy start, while the nearly destroyed enemy scout can be ignored or finished. Cash is empty, so maintain the refinery construction and send the harvester back to ore; keep the army moving west to reveal and engage the enemy base.
- **2:40 GPT-5.6 Terra**: We need rebuild our infantry screen while accumulating funds for the first War Factory. The forward riflemen should engage the exposed enemy squad and continue scouting northeast toward their likely base.
- **2:48 GPT-5.6 Luna**: The refinery is still under construction and cash is empty, so keep the harvester mining and let the existing rocket queue run. The army is near the western approach; continue advancing toward the suspected enemy base and engage the visible infantry.
- **2:48 GPT-5.6 Terra**: We need more income and must keep scouting toward the likely eastern enemy base. Current infantry will probe east while the new rifle squads reinforce behind them; save ore for a War Factory as the next major tech step.
- **2:56 GPT-5.6 Luna**: The army is advancing toward the likely enemy base and has spotted resistance near (38,24). Keep pressure west while the refinery completes and the existing rocket queue continues; the harvester should keep mining.
- **2:56 GPT-5.6 Terra**: We have strong power and two refineries but need a War Factory as soon as funds permit. Keep the rifle force advancing toward the likely enemy start while producing a small reinforcement batch.
- **3:04 GPT-5.6 Luna**: The western attack force is advancing but has not found the enemy base yet. Keep all combat units moving west toward the suspected enemy start, while the harvester continues mining and the refinery finishes; existing rocket production queues should remain active.
- **3:04 GPT-5.6 Terra**: Our economy is close to a third refinery but cannot yet afford it; preserve cash briefly while infantry continues scouting toward the likely enemy side. Keep barracks active with a small rifle batch and push the forward rifles east to locate targets.
- **3:12 GPT-5.6 Luna**: The refinery is still building and cash is empty, so preserve the economy while the existing rocket soldiers scout west. Keep infantry production active and converge the army toward the likely enemy start.
- **3:12 GPT-5.6 Terra**: Income capacity needs to grow before committing to a War Factory. Infantry will continue scouting east-northeast toward the likely Allied start while new troops reinforce the advance.
- **3:20 GPT-5.6 Luna**: The refinery is halfway built and income should resume shortly; keep the rocket production queue active. Send the two existing rocket soldiers west toward the likely enemy start while avoiding idle army time.
- **3:20 GPT-5.6 Terra**: Third refinery is underway and infantry are advancing along the northern route toward the likely enemy start. Keep the rifle groups moving and use incoming income to transition into a War Factory immediately after refinery placement.
- **3:28 GPT-5.6 Luna**: The refinery is nearly complete, so conserve cash and place it next turn to expand income. Keep the rocket soldier scouting west toward the likely enemy base while the existing rocket queue continues.
- **3:28 GPT-5.6 Terra**: Third refinery is nearly complete and power is ample. Consolidate the rifle force and continue probing toward the likely enemy start while keeping infantry production queued.
- **3:36 GPT-5.6 Luna**: The second refinery is still only 52% complete and cash is empty, so economic expansion must finish before adding more production. Send the damaged rocket soldier west toward the likely enemy base while the harvester continues mining.
- **3:36 GPT-5.6 Terra**: Our third refinery is nearly ready and infantry has pushed deep toward the likely enemy approach. Place the refinery immediately, keep rifle production continuous, and press the forward group toward the enemy start while eliminating the visible rocket soldier.
- **3:44 GPT-5.6 Luna**: The second refinery is still under construction and cash is empty, so preserve the harvester and let the existing rocket queue and refinery construction proceed. Once income arrives, prioritize tanks and a service depot, while scouting west toward the likely enemy base.
- **3:44 GPT-5.6 Terra**: Our third refinery is nearly complete while the rifle force has pushed deep across the map without contact. Keep all infantry advancing toward the likely Allied base and immediately place the refinery when ready, then fund a War Factory.
- **3:52 GPT-5.6 Luna**: Cash is empty, but the second refinery is nearly complete and the harvester is returning to ore. Keep the existing rocket soldier scouting toward the likely enemy start while production resumes; avoid starting new construction until income arrives.
- **3:52 GPT-5.6 Terra**: Our third refinery is ready and must be placed to increase income. The rifle column is reaching the likely enemy start, so keep it advancing while the barracks continues producing.
- **4:00 GPT-5.6 Luna**: The second refinery is nearly complete, while the economy is temporarily broke and the barracks already has a long rocket-soldier queue. Keep the harvester mining and use the War Factory to add another harvester as soon as funds arrive; avoid committing without an army.
- **4:00 GPT-5.6 Terra**: Three refineries and strong power support our economy, but cash is temporarily depleted. The rifle column should continue its eastward sweep toward the likely enemy start while harvesters mine continuously until we can afford a War Factory.
- **4:08 GPT-5.6 Luna**: The second refinery is nearly complete, but power is low and cash is exhausted. Finish the refinery, then immediately add power; keep the war factory producing harvesters and use the barracks’ existing rocket queue to rebuild an army against the infantry threatening the base.
- **4:08 GPT-5.6 Terra**: Three refineries and harvesters should replenish cash shortly. Infantry is approaching the likely enemy start; consolidate the entire force there to scout and engage while saving for a War Factory.
- **4:16 GPT-5.6 Luna**: The second refinery is nearly ready, but power is critically low and cash is empty. Finish and place the refinery, then restore power while continuing rocket production; the nearby enemy infantry should be handled defensively until an army forms.
- **4:16 GPT-5.6 Terra**: Our infantry spearhead is at the likely enemy start but has not revealed structures yet. Economy has ample stored ore but no liquid cash at this instant, so keep harvesters mining and push the full army through the enemy area while waiting to fund a War Factory.
- **4:24 GPT-5.6 Luna**: The enemy infantry is pressing the base, but the power plant is nearly ready and should restore production. Keep rocket and rifle production running, repair the damaged barracks, and ensure the harvester returns to ore; place the power plant as soon as it completes next turn.
- **4:24 GPT-5.6 Terra**: Our infantry has reached the enemy’s likely start area but has not yet spotted structures, so they will sweep the surrounding cells. Economy is strong with three refineries and ample power; start a War Factory immediately and prepare armored production.
- **4:32 GPT-5.6 Luna**: Power Plant is nearly complete but the base is under immediate infantry pressure; production queues are already active and funds are critically low. Keep the harvester mining, finish the power plant, and preserve the damaged structures while the queued infantry emerges.
- **4:32 GPT-5.6 Terra**: Our infantry column has reached the enemy’s likely start area but has not revealed structures yet. Keep sweeping east while the War Factory completes, then use vehicle production to convert our strong economy into a decisive attack force.
- **4:40 GPT-5.6 Luna**: Place the ready Power Plant immediately to restore production, then keep the War Factory producing harvesters so the damaged economy recovers. The enemy infantry is dangerously close to the base, so prioritize power and repairs while avoiding exposing the lone harvester.
- **4:40 GPT-5.6 Terra**: Our infantry have reached the likely enemy start but have not revealed structures, so sweep the northeast corner and then south along the eastern edge. The War Factory is nearing completion; preserve cash flow for armor production as soon as it is placed.
- **4:48 GPT-5.6 Luna**: Enemy infantry is massed directly west of the base while I have no combat units. Place the pending power plant, stop the second harvester queue in favor of immediate defenses, and rush a barracks plus mobile flak production while repairing the Construction Yard and War Factory.
- **4:48 GPT-5.6 Terra**: Our infantry has reached the enemy start and found a damaged power plant; destroy it while continuing the sweep. War Factory is nearly ready, then we will immediately place it and start armored production.
- **4:56 GPT-5.6 Luna**: The base is under immediate infantry pressure, but cash is temporarily empty and the barracks is already building. Keep the harvester mining, preserve the damaged Construction Yard and War Factory, and let the queued flak vehicles accumulate while income returns.
- **4:56 GPT-5.6 Terra**: Our infantry mass is inside the enemy base and can finish their visible economy and production while reinforcements continue arriving. Keep the War Factory and Refinery under direct attack; save ore for the nearly complete second War Factory and then produce vehicles nonstop.
- **5:04 GPT-5.6 Luna**: The base is under immediate infantry pressure, with no combat units yet and critically low power. Keep the harvester mining, continue repairs, and attempt the power plant as soon as funds arrive while the queued mobile flak units provide the first defense.
- **5:04 GPT-5.6 Terra**: Our rifle swarm is inside the exposed enemy base and their Construction Yard is nearly destroyed. Keep all forward infantry focused on enemy buildings while the War Factory finishes, then place it and begin armor production.
- **5:12 GPT-5.6 Luna**: Power Plant is still building and the base is under immediate infantry pressure. Keep both harvesters mining, repair the damaged base structures, and let the queued mobile flak units provide the first defense; place the power plant as soon as it is ready.
- **5:12 GPT-5.6 Terra**: Our rifle force is inside the exposed enemy base and all visible structures are heavily damaged. Place the finished War Factory, immediately begin another refinery for sustained armor production, and focus every forward rifle on the enemy Construction Yard for the instant-win path.
- **5:20 GPT-5.6 Luna**: We are under immediate infantry pressure with no combat units and critically low power. Keep both harvesters working, repair the refinery and war factory, and begin a power plant as soon as funds permit while the flak queue continues.
- **5:20 GPT-5.6 Terra**: Our rifle force is inside the exposed enemy base and should finish the damaged refinery and war factory immediately. Place the ready War Factory, keep infantry production active, and convert incoming refinery income into armor once the factory is online.
- **5:28 GPT-5.6 Luna**: Our base is overrun and we have no combat units or available production, so the immediate priority is extracting both harvesters from the infantry swarm while repairs continue. Send them away from the construction area toward the southern ore fields and keep repairing the refinery and damaged production building.
- **5:28 GPT-5.6 Terra**: Our rifle force is inside the exposed enemy base and their refinery is nearly destroyed. Finish the refinery, eliminate visible harvesters, and reinforce the assault with the trailing infantry while income completes the queued refinery.
- **5:36 GPT-5.6 Luna**: The refinery is nearly destroyed and the base is surrounded, with no combat units or power. I will keep repairing it, evacuate both harvesters, and immediately queue a power plant so production can resume once ore is processed.
- **5:36 GPT-5.6 Terra**: Our rifle mass is inside the exposed enemy base and their refinery is nearly destroyed. Finish the refinery, kill the visible harvester, and push all trailing infantry through the enemy start while the fourth refinery completes.
- **5:44 GPT-5.6 Luna**: The base is critically damaged and lacks a Construction Yard or power production, so rebuilding is currently impossible. Keep both harvesters mining/retreating while the refinery repairs; no combat force is available.
- **5:44 GPT-5.6 Terra**: Our infantry spearhead has reached the enemy start area while reinforcements are crossing the map. The third refinery is nearly complete; immediately convert its income into infantry and push all available forces through the enemy base location.
- **5:52 GPT-5.6 Luna**: My base and all units have been destroyed, leaving no MCV, buildings, or production capability. I cannot issue any meaningful recovery orders.
- **5:52 GPT-5.6 Terra**: Our infantry has reached the suspected enemy start and no enemy structures are currently visible, suggesting the base may be destroyed or concealed nearby. Keep the large force sweeping the northeast while the nearly complete refinery is placed immediately once ready to fuel further production.

---
Source: https://evaljetty.com/openra/runs/r2-rr-gpt56terra-gpt56luna-g2.html · Evals by Jetty · Run your own evals: https://jetty.io/?utm_source=evaljetty&utm_medium=llms