---
title: "Jev Router vs Claude Sonnet 5 | OpenRA arena run | Evals by Jetty"
url: https://evaljetty.com/openra/runs/cup1-final-g1.html
description: "Claude Sonnet 5 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 · Pilot cup · Pilot cup · cup1-final-g1

# Jev Router vs Claude Sonnet 5

Claude Sonnet 5 destroyed the enemy base after 7.3 game-minutes · 12.1 min wall clock

Pilot game (run locally, before the Jetty runs)
[Replay (.orarep)](https://evaljetty.com/openra/media/cup1-final-g1.orarep)
[Decision log](https://evaljetty.com/openra/runs/cup1-final-g1/decisions.jsonl)

LOSS england · west

Jev Router

typesafe/jev-router

Value destroyed$2,000Value lost$17,000
Units killed / lost20 / 47Buildings killed / lost0 / 11
Peak army$3,200Orders issued136
Decision turns (failed)55 (0)Mean latency8.3sModel cost$0.000

WIN ukraine · east

Claude Sonnet 5

anthropic/claude-sonnet-5

Value destroyed$17,000Value lost$2,000
Units killed / lost47 / 20Buildings killed / lost11 / 0
Peak army$6,500Orders issued179
Decision turns (failed)55 (0)Mean latency4.6sModel cost$0.365

## Evaluation

No validation report stored for this run.

## 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 Jev Router**: I have only the MCV and full starting cash. I will deploy it immediately, then queue a refinery, power plant, barracks, and war factory to establish economy and production. I will place the buildings around the home base as they become ready.
- **0:00 Claude Sonnet 5**: Deploy MCV to establish base first.
- **0:08 Jev Router**: The MCV has successfully deployed into the Construction Yard. The previously started Power Plant is now ready to place, and no additional structures are currently available to queue until placement and construction are complete.
- **0:08 Claude Sonnet 5**: Construction Yard ready. Start economic buildup: power plant then refinery.
- **0:16 Jev Router**: The Allied Construction Yard is established at (12,16), but there is no power or income yet. I will start construction of the essential Power Plant now, then use future turns to establish an Ore Refinery and production infrastructure.
- **0:16 Claude Sonnet 5**: Place power plant, then queue refinery and barracks. Enemy far west, need economy first.
- **0:24 Jev Router**: Place the ready Power Plant immediately, then construct an Ore Refinery to establish income. With Allied power secured, continue toward a Barracks for early infantry while saving for vehicles.
- **0:24 Claude Sonnet 5**: Continue economy buildup: power already built, now ore refinery, barracks, more power as needed.
- **0:32 Jev Router**: Our Construction Yard and initial Power Plant are intact, with $4700 available and no visible enemy forces. I will place the ready power plant, then start construction of an Ore Refinery to establish income; additional military production will follow once the economy is secured.
- **0:32 Claude Sonnet 5**: Proc is building. Keep queue going with barracks next while waiting.
- **0:40 Jev Router**: The first Ore Refinery is under construction and the initial Power Plant is already online. Queue a Power Plant and an Allied Barracks so production can begin, while preparing to place the refinery as soon as it is ready.
- **0:40 Claude Sonnet 5**: Continue building economy: proc is in progress, queue barracks next.
- **0:48 Jev Router**: The first Ore Refinery is under construction, followed by a Power Plant and Allied Barracks. Queue a second refinery afterward to expand income once the barracks is operational.
- **0:48 Claude Sonnet 5**: Continue building economy: proc and barr are underway. Let them finish, queue more power after.
- **0:56 Jev Router**: The first Ore Refinery is 70% complete and a second is queued, but no harvester or army is active yet. Keep the construction pipeline full by adding a Power Plant after the refineries; continue placing buildings and establish barracks production next.
- **0:56 Claude Sonnet 5**: Proc and barr are in progress. Wait for proc to finish then place it, keep barr queued.
- **1:04 Jev Router**: The first refinery is at 94% and should be placed immediately to restore income; a power plant is already queued behind it. With ample cash but no military production, queue an Allied Barracks next while continuing base infrastructure.
- **1:04 Claude Sonnet 5**: Place proc, continue barracks build, queue power plant next for economy.
- **1:12 Jev Router**: The initial Ore Refinery is ready for placement, while the Construction Yard and Power Plant are intact. Place the refinery near the base to begin income; the existing building queue is already active, so avoid duplicating production orders until the next briefing.
- **1:12 Claude Sonnet 5**: Place power plant, keep building barracks then war factory and second refinery for economy growth.
- **1:20 Jev Router**: The first Refinery is ready and the Power Plant is supplying ample power, so I should place the Refinery immediately to establish a second income source. A Barracks is already under construction with additional buildings queued, so I will extend the queue with another Ore Refinery to strengthen the economy.
- **1:20 Claude Sonnet 5**: Continue economy buildup: barracks queued, proc queued. Keep expanding.
- **1:28 Jev Router**: The base is stable with one power plant, one refinery, and a ready Allied Barracks. I will place the barracks near the Construction Yard, then use the queued refineries, power plants, and second barracks to expand economy and production before scouting the enemy base.
- **1:28 Claude Sonnet 5**: Economy is building; continue with barracks and refinery, then add war factory. Keep queue busy.
- **1:36 Jev Router**: The base is stable with power to spare and a ready Allied Barracks that should be placed immediately. I will expand production by queueing a War Factory and an additional Power Plant, while keeping the existing refinery/building sequence running.
- **1:36 Claude Sonnet 5**: Economy building phase. Continue building queue, wait for placements.
- **1:44 Jev Router**: The barracks is now available to place, while the first Ore Refinery continues constructing. I will establish early mixed infantry and queue another refinery to improve income; no enemy contact is visible yet.
- **1:44 Claude Sonnet 5**: Economy is building; keep queuing production and prepare to place buildings as they complete.
- **1:52 Jev Router**: The first refinery is nearly complete, power is comfortable, and both infantry types are queued. Build another refinery to expand income while continuing the queued infrastructure, and reinforce with rifle infantry.
- **1:52 Claude Sonnet 5**: Place the ready proc, keep queues moving. Base is developing well; need to place proc and keep building.
- **2:00 Jev Router**: The first Ore Refinery is nearly complete, so I should place it immediately and expand income. I will add a Power Plant for growing infrastructure and continue queuing mixed infantry, including Rocket Soldiers, while keeping the existing defensive rally near the base.
- **2:00 Claude Sonnet 5**: Place power plant, keep building barracks and war factory, queue more production once ready.
- **2:08 Jev Router**: The completed Ore Refinery still needs to be placed, and the base has ample power but only one harvester. I will expand economy and maintain a defensive infantry mix while the larger queues finish.
- **2:08 Claude Sonnet 5**: Economy building already in progress; keep queue moving with barracks and war factory production once available. Continue expanding.
- **2:16 Jev Router**: Our base is established with two refineries and adequate power, while a second barracks and additional structures are already progressing. With no enemy sighted, I will use the nine available combat units as an early eastern assault force and continue producing rocket infantry.
- **2:16 Claude Sonnet 5**: Multiple buildings queued already; let production continue. Economy strong, wait for barracks/war factory completion to start unit production.
- **2:24 Jev Router**: The base is stable with two refineries and a growing infantry force, while the main assault group has departed toward the enemy start. I will place the ready barracks, continue power and infantry production, and use the available cash efficiently.
- **2:24 Claude Sonnet 5**: Economy building. Wait for construction to finish, then place buildings and start producing units.
- **2:32 Jev Router**: The base has two refineries, two barracks, and a large infantry assault already moving toward the likely enemy start. Power is exactly balanced, so I will place the ready power plant and reinforce the attack with the assault group while production continues.
- **2:32 Claude Sonnet 5**: Economy already strong with two procs and multiple power plants. Continue building army infrastructure and start training units once barracks/weap complete.
- **2:40 Jev Router**: The first power plant is ready for placement, and the base has two refineries, two barracks, and several queued production items. The main infantry force is already deep in the map, so I will place the power plant and push all combat units toward the likely enemy base while continuing infantry production.
- **2:40 Claude Sonnet 5**: Place ready proc, continue economy buildup, prep for tank production once war factory finishes.
- **2:48 Jev Router**: The main force has advanced to the central map without contact, while two riflemen and one rocket soldier remain near the base. With no enemy visible and no funds available, continue the concentrated assault toward the likely enemy base at (95,11).
- **2:48 Claude Sonnet 5**: Place ready power plant, keep production going. Multiple barracks/weap queued already. Need to place buildings as they complete and start training once possible.
- **2:56 Jev Router**: The base has strong economy and production, but the assault has stalled around x=60 without contact. I will continue the entire mixed infantry force toward the likely enemy base at (95,11) while placing the ready power plant.
- **2:56 Claude Sonnet 5**: Economy solid with 3 procs. Barracks/weap in queue, need to place them when ready and keep training units. Add more power for upcoming war factories.
- **3:04 Jev Router**: The main mixed force has advanced to x=74, well toward the likely enemy base at (95,11), while the economy has three refineries and sufficient power. Concentrate the entire field infantry force on the enemy location and queue a War Factory for future tank production.
- **3:04 Claude Sonnet 5**: Place barracks, keep building queue running, train infantry once ready.
- **3:12 Jev Router**: The ready power plant should be placed immediately to preserve power growth. The existing infantry are spread along the attack corridor, so I will concentrate the full combat force toward the likely enemy base at (95,11) and continue filling barracks queues.
- **3:12 Claude Sonnet 5**: Place ready power plant, continue building queue, start training infantry from barracks for early defense/economy.
- **3:20 Jev Router**: The main infantry force has reached the enemy start area and found two defenders. With no cash available, I will concentrate all 18 combat units for a unified assault while the War Factory continues building.
- **3:20 Claude Sonnet 5**: Enemy infantry group spotted near our base at (87,10-12), close to our territory. We have limited army (2 e1). Focus on economy and defense while building barracks/war factory, train more infantry to deal with the threat.
- **3:28 Jev Router**: Our dispersed infantry have reached the enemy’s northern position and encountered four riflemen, so consolidate them for the push. Keep the existing production queues running while the War Factory completes.
- **3:28 Claude Sonnet 5**: Enemy scouts near base. Keep building economy: barracks nearly done, add weap factory queue after barr. Train more infantry for defense. Continue power/proc buildout.
- **3:36 Jev Router**: The base is stable with strong power and two refineries, while the War Factory is under construction. Enemy units are currently out of sight, so I will continue pushing the combined infantry force toward the likely enemy base and ensure both harvesters are mining.
- **3:36 Claude Sonnet 5**: Economy strong, multiple buildings queued. Keep training infantry and let production continue, attack the scout.
- **3:44 Jev Router**: The war factory is nearly ready, while the existing infantry queues should maintain pressure. With no enemies visible and the enemy base likely at (95,11), concentrate and advance the scattered infantry; keep both harvesters mining.
- **3:44 Claude Sonnet 5**: Economy strong, need war factory and barracks to finish. Keep training infantry and start moving army toward enemy base cautiously while production continues.
- **3:52 Jev Router**: Our main combat group has advanced deep along the enemy’s northern approach while enemy infantry is visible near (78,11). I will consolidate the entire force with attack-move orders and continue the assault toward the likely enemy base at (95,11).
- **3:52 Claude Sonnet 5**: Place the ready refinery, keep infantry production going, and continue building barracks/war factory for tanks. Push idle infantry toward enemy direction slowly.
- **4:00 Jev Router**: We have a ten-unit combat force scattered along the northern advance and enemy infantry is visible at (72-74,17-19). Consolidate on that scout force with the entire force; the base is secure and production can continue as ore income arrives.
- **4:00 Claude Sonnet 5**: Place the ready power plant, continue building econ/army. Keep pushing infantry group west toward enemy base while war factory and barracks finish.
- **4:08 Jev Router**: Our seven combat units are scattered across the forward field, with the rocket soldiers leading and no enemy currently visible. Continue converging them toward the likely enemy base so they can secure the area and engage reinforcements.
- **4:08 Claude Sonnet 5**: Economy is strong with multiple refineries. Weap and barr still building. Keep infantry pushing west toward enemy base at (12,16), continue training more infantry, and queue more production once buildings finish.
- **4:16 Jev Router**: Our riflemen have advanced to the central map with no enemy units currently visible, while both harvesters remain near the base. I will continue the push toward the likely enemy base at (95,11), maintain infantry production, and keep the harvesters mining.
- **4:16 Claude Sonnet 5**: Push infantry group further west toward enemy base, keep training more infantry and let weap/barr finish for tanks.
- **4:24 Jev Router**: The rifle force is the only available combat force and has no visible enemy contact, while the War Factory is nearly complete. With no cash for additional production, continue pushing the entire rifle group toward the likely enemy base and keep the harvesters collecting ore.
- **4:24 Claude Sonnet 5**: Army scattered along path west; consolidate and push toward enemy base at (12,16). Keep production going.
- **4:32 Jev Router**: The war factory is nearly complete, but there is no cash for new production. The rifle force is the only available combat group, so I will push it toward the likely enemy base while keeping both harvesters collecting ore.
- **4:32 Claude Sonnet 5**: Continue pushing infantry groups west toward enemy base, consolidate scattered squads, and keep production going once weap finishes.
- **4:40 Jev Router**: The war factory is nearly complete, but cash is currently insufficient for another unit. The six surviving rifle infantry are spread across the forward approach with no enemies visible, so I will consolidate them and continue pushing toward the likely enemy base at (95,11).
- **4:40 Claude Sonnet 5**: Infantry scattered mid-map, weap almost done. Consolidate all infantry and push west toward enemy base at (12,16), keep training more units, build second power/barracks.
- **4:48 Jev Router**: The eastern infantry push has been reduced to three units, while the war factory is nearly complete and the base is fully powered. No enemy is visible, so I will continue the surviving scouts east toward the likely enemy start and consolidate new infantry near the defenses.
- **4:48 Claude Sonnet 5**: Infantry pushing west toward enemy base at (12,16). War factory almost done; will build tanks once ready. Keep econ and production rolling.
- **4:56 Jev Router**: The ready War Factory should be placed immediately to restore vehicle production. With only three combat survivors, avoid a frontal assault and consolidate them as a forward defensive force while the extensive production queue continues.
- **4:56 Claude Sonnet 5**: Weap factory ready to place; place it. Continue pushing infantry west toward enemy base at (12,16). Queue more e1 and start tank production once weap is placed.
- **5:04 Jev Router**: The newly completed War Factory is active, but our three surviving combat units are outnumbered and scattered near an enemy infantry group. With no cash and long infantry queues, pull the survivors back to a defensible position near the base and consolidate production behind them.
- **5:04 Claude Sonnet 5**: Big infantry force spread across the map heading west toward enemy base at (12,16). Continue consolidating and pushing. Place ready power plant, keep production going, add service depot for tanks later.
- **5:12 Jev Router**: The base is fully established, but the field army has been reduced to one rocket soldier. I will keep both harvesters mining, send the rocket toward the recently reported enemy scouts, and consolidate newly produced infantry at the forward staging point.
- **5:12 Claude Sonnet 5**: Army is strung out along path west; keep pushing toward enemy base at (12,16) to consolidate before assault. Build fix depot then start tank production, keep training infantry and expanding econ.
- **5:20 Jev Router**: Power plant is ready to place, and enemy infantry has appeared just southeast of the base at (21-22,17). Place the power plant, reinforce the barracks, and use the three rifles to engage the nearby probe while existing rocket production continues.
- **5:20 Claude Sonnet 5**: Army strung along path to enemy base; consolidate and push forward. Place ready barracks, continue infantry production, queue tanks once possible.
- **5:28 Jev Router**: An enemy infantry force is probing just southeast of the base, while one rifle and several queued rocket soldiers are our only immediate defenders. Send the rifle forward to the contact point and keep both harvesters mining; continue the refinery and infantry production already underway.
- **5:28 Claude Sonnet 5**: Large infantry force near enemy base at (12,16), harvester spotted nearby. Push attack toward enemy base to find and destroy buildings. Keep production running.
- **5:36 Jev Router**: The enemy has a large infantry cluster inside the base, while my only combat unit is a damaged rifleman and the barracks are nearly full of queued infantry. I will use the rifleman to engage the nearest cluster immediately, keep the harvesters away from the fight, and continue filling the production queues with cheap infantry.
- **5:36 Claude Sonnet 5**: Big infantry blob near enemy base at (17-20,17-19). Push attack into their proc/weap buildings now. Keep training more infantry and continue fix/weap builds.
- **5:44 Jev Router**: Enemy rifle infantry have penetrated to the base and are endangering the refineries and damaged war factory. The two rocket soldiers are the only available defenders, so focus them into the densest cluster while the existing production queues continue.
- **5:44 Claude Sonnet 5**: Big infantry blob is near enemy base at (15-17,15-17); push attack there. Keep producing units and infrastructure.
- **5:52 Jev Router**: A large enemy infantry force has penetrated the base and is threatening the refineries, while only two rockets are available for defense. Preserve the economy, repair critical infrastructure, and concentrate newly produced infantry around the eastern approach.
- **5:52 Claude Sonnet 5**: My infantry force near enemy base should push in and finish off proc/weap. Keep training more troops and place fix depot.
- **6:00 Jev Router**: Enemy infantry has penetrated deep into the base, while our refineries and war factory are being repaired. Reinforce the crowded production queues and establish a pillbox near the command center; rely on the existing defensive rockets and newly produced troops to clear the incursion.
- **6:00 Claude Sonnet 5**: My infantry near enemy base should finish off the weak proc/weap buildings. Keep pushing all forward units towards enemy base, continue training and building.
- **6:08 Jev Router**: A large enemy infantry force has penetrated the base and threatens the low-health war factory. The two available anti-infantry defenders are the best response and should concentrate fire on the cluster while construction continues.
- **6:08 Claude Sonnet 5**: Front infantry stack near enemy base at (17-22,16-19); push to finish off weap#223 and remaining enemy units. Keep training and building at home.
- **6:16 Jev Router**: Our economy is currently empty and the base has no visible combat units, while rifle infantry are massing immediately east of the factory. I will keep both harvesters mining and commit the two defenders mentioned in the last report to the enemy cluster, if they are still active.
- **6:16 Claude Sonnet 5**: Big infantry stack near enemy base at (17-19,16-19). Push to destroy tent #150 and continue expansion. Keep training reinforcements and send idle home troops forward.
- **6:24 Jev Router**: Our base is under immediate pressure from a large enemy rifle cluster, while our only combat unit is a single damaged rifleman. Preserve the Construction Yard and economy by retreating the rifleman to the base, keeping the harvesters working, and using the existing production queues rather than overcommitting.
- **6:24 Claude Sonnet 5**: Large infantry force near enemy base (17-19,16-19); push toward remaining enemy at (15,14) and destroy structures. Keep reinforcing with idle troops and continue production.
- **6:32 Jev Router**: The enemy rifle mass is immediately east of the damaged construction yard, while only the two harvesters are currently visible. I will keep the harvesters mining and send any available combat force toward the enemy cluster; the existing production queues should continue automatically.
- **6:32 Claude Sonnet 5**: Large infantry force near enemy fact at (12,16), 72% hp. Push all nearby units to finish it off. Keep training reinforcements and queue up war factory/barracks completion.
- **6:40 Jev Router**: The base is in immediate danger: the construction yard is at 15% health and 30 enemy infantry are massed just east of it. There are no combat units available, so I will keep harvesting, repair the critical structures, and queue infantry from the barracks while positioning its rally point toward the enemy cluster.
- **6:40 Claude Sonnet 5**: Enemy construction yard is at 15% hp, my army is right there. Finish it off and keep production going.
- **6:48 Jev Router**: Our base has lost its barracks and all combat units, while a large enemy infantry cluster is probing at x14-16,y15-16. I will rebuild a barracks immediately, place it safely behind the base, and queue rifle and rocket infantry to restore a defensive force while the harvesters continue mining.
- **6:48 Claude Sonnet 5**: Big army near enemy base already, push to destroy remaining buildings. Keep production rolling.
- **6:56 Jev Router**: Our base has no production structure or MCV, and the enemy infantry is massing near the refinery, so the immediate priority is preserving the harvesters and damaged refinery while rebuilding production. Both harvesters should continue mining; no defensive army is currently available.
- **6:56 Claude Sonnet 5**: Enemy base is nearly destroyed (only a weak powr visible). Push remaining infantry into the base to finish it off, place the war factory, and keep training reinforcements.
- **7:04 Jev Router**: A large enemy infantry force is overwhelming the nearly destroyed base, while we have no combat units or MCV. Prioritize repairing the refinery and restarting infantry production, while keeping both harvesters mining as long as they are safe.
- **7:04 Claude Sonnet 5**: Enemy base nearly destroyed with two buildings left. Push forward infantry cluster to finish them off, keep producing units, and manage idle troops.
- **7:12 Jev Router**: Our base is under immediate attack by a large enemy infantry force, while our economy and military are nearly destroyed. I will pull both harvesters away from the enemy and repair the remaining power structure; no production is currently available.
- **7:12 Claude Sonnet 5**: Big force already at enemy base near (11-13,16-17). Focus fire on remaining enemy building powr#242 and harv#133 to finish them off, then mop up. Keep training reinforcements.

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Source: https://evaljetty.com/openra/runs/cup1-final-g1.html · Evals by Jetty · Run your own evals: https://jetty.io/?utm_source=evaljetty&utm_medium=llms