---
title: "Claude Sonnet 5 vs Jev Router | OpenRA arena run | Evals by Jetty"
url: https://evaljetty.com/openra/runs/r2-rr-jev-sonnet5-g2.html
description: "Jev Router 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-jev-sonnet5-g2

# Claude Sonnet 5 vs Jev Router

Jev Router destroyed the enemy base after 5.0 game-minutes · 7.2 min wall clock

Jetty run dcf50a3a
[Replay (.orarep)](https://evaljetty.com/openra/media/r2-rr-jev-sonnet5-g2.orarep)
[Decision log](https://evaljetty.com/openra/runs/r2-rr-jev-sonnet5-g2/decisions.jsonl)
[Runtime config](https://evaljetty.com/openra/runs/r2-rr-jev-sonnet5-g2/runtime_config.json)[Validation report](https://evaljetty.com/openra/runs/r2-rr-jev-sonnet5-g2/validation_report.json)

LOSS england · west

Claude Sonnet 5

anthropic/claude-sonnet-5

Value destroyed$600Value lost$12,800
Units killed / lost2 / 4Buildings killed / lost0 / 11
Peak army$1,400Orders issued53
Decision turns (failed)38 (0)Mean latency4.4sModel cost$0.224

WIN germany · east

Jev Router

typesafe/jev-router

Value destroyed$12,800Value lost$600
Units killed / lost4 / 2Buildings killed / lost11 / 0
Peak army$2,600Orders issued84
Decision turns (failed)38 (0)Mean latency4.2sModel cost$0.065

## 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 | jev won: base destroyed |
| pass | code\_check | decisions-logged | turns per slot: {'Multi0': 38, 'Multi1': 38} |
| pass | code\_check | llm-turns-valid | failed/total per slot: {'Multi0': '0/38', 'Multi1': '0/38'} |
| pass | code\_check | video-decodes | duration 51.8s |
| pass | code\_check | video-complete | video ends at tick 7466 of 7466 |
| pass | code\_check | limits-respected | ended after 7.2 wall-minutes (budget 30.0 min): base destroyed |
| pass | checklist | notes-explain-win | summary.md Notes section cites both models final thoughts and explains Jevs infantry sweep victory |
| pass | checklist | players-match-request | result.json shows Multi0=sonnet5 (anthropic/claude-sonnet-5) and Multi1=jev (typesafe/jev-router) as requested |
| pass | checklist | no-silent-outage | run.log shows continuous tick progress with 0 LLM failures in 38 turns each no gaps |

## 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 Claude Sonnet 5**: Deploy MCV to start base, then build power and economy.
- **0:00 Jev Router**: Standard opening: deploy MCV immediately to get Construction Yard, then queue a power plant. Next turn will place it and start the refinery.
- **0:08 Claude Sonnet 5**: MCV should be deploying now. Start building power plant, then refinery.
- **0:08 Jev Router**: MCV has deployed into Construction Yard. Starting Power Plant construction to begin opening build order.
- **0:16 Claude Sonnet 5**: Place the ready power plant, then queue an ore refinery and barracks for economy start.
- **0:16 Jev Router**: Opening is standard: my MCV is deployed (fact #122) and a powr is ready to place. I'll place the power plant adjacent to the ConYard and start the first Ore Refinery for income.
- **0:24 Claude Sonnet 5**: Continue economy build: power plant already placed, now build ore refinery and barracks to establish economy and army production.
- **0:24 Jev Router**: Power plant is placed and functioning. Starting production of Ore Refinery to get economy and harvester going.
- **0:32 Claude Sonnet 5**: Proc and tent are building. Let's queue another power plant to sustain expansion and prepare for war factory.
- **0:32 Jev Router**: Opening is underway: refinery is 23% complete. Nothing else can be queued while the Building queue is busy, so I'll attempt to queue the barracks (tent) to keep production flowing as soon as the refinery finishes. No army yet, so no combat actions.
- **0:40 Claude Sonnet 5**: Continue building economy: proc, powr, tent are queued. Let them finish, then queue weap and start army production.
- **0:40 Jev Router**: Opening is on track: proc nearly done, powr up, tent queued. No army yet and nothing to build this turn since the single building queue is busy with the refinery. Next turn I place the refinery and get harvesters mining.
- **0:48 Claude Sonnet 5**: Continue base setup, wait for buildings to complete then place them.
- **0:48 Jev Router**: Opening is on track: power plant up, refinery at 70%, barracks queued. No army yet, so just keep the building queue fed. I'll queue a war factory after the barracks, then a second refinery to grow income.
- **0:56 Claude Sonnet 5**: Proc, powr, tent building. Wait for them to complete then place. Keep queue going.
- **0:56 Jev Router**: Economy opening continues: refinery nearly done, barracks queued. Nothing to fight yet. I'll make sure the building queue keeps moving and prep war factory for tank production.
- **1:04 Claude Sonnet 5**: Place ore refinery near base, continue building queue.
- **1:04 Jev Router**: Place the ready Ore Refinery to get income and a free harvester. With $3300 in the bank, keep the building queue busy: after the barracks finishes, get a War Factory going for tanks.
- **1:12 Claude Sonnet 5**: Place ready powr, keep building tent, then queue war factory and second proc for economy scaling.
- **1:12 Jev Router**: Barracks nearly done, economy running with one harvester and ~$3k banked. Queue the War Factory next so I can build tanks and a second harvester, then push production.
- **1:20 Claude Sonnet 5**: Economy is building up. Keep building proc and tent, plan to add weap factory next once funds allow.
- **1:20 Jev Router**: Barracks is ready to place. I'll drop it near my base, queue some infantry to scout, and keep the war factory building. Economy is decent with one harvester, so I'll add a second refinery soon.
- **1:28 Claude Sonnet 5**: Continue economy build-up: proc and tent already queued. Keep producing power and prepare war factory next.
- **1:28 Jev Router**: Economy is stable (power 100/50, $2555 cash). War Factory is already building. Keep the barracks busy with cheap infantry to scout and defend, and keep cash flowing. Once weap finishes, build tanks and a service depot.
- **1:36 Claude Sonnet 5**: Continue economy buildup; proc/powr/tent already queued. Wait for them to finish, then queue war factory.
- **1:36 Jev Router**: Economy is fine (power 100/50, 1 harvester mining). weap is at 32% and infantry queues are running. I'll send my 3 idle riflemen east to scout toward the enemy start at (95,11) while continuing infantry production so every queue stays busy.
- **1:44 Claude Sonnet 5**: Continue economic buildup: proc and powr finishing, tent queued. Once done, build weap factory for tanks. Keep queue busy.
- **1:44 Jev Router**: Early game: 1 harvester only, need more income. weap almost done, then queue proc#2 for economy. Keep infantry training and continue scouting east to find enemy base.
- **1:52 Claude Sonnet 5**: Place the ready proc, keep building power and barracks queued. Economy still ramping up.
- **1:52 Jev Router**: Economy is thin (1 harvester, $1158). War factory at 66% — finish it, then add a second refinery and service depot for tanks. Keep the 3 rifle infantry pushing east toward the suspected enemy base to map territory.
- **2:00 Claude Sonnet 5**: Place ready powr, keep economy and production going. Queue war factory and more units after barracks finishes.
- **2:00 Jev Router**: War Factory nearly done (82%), economy stable with 1 harvester and positive power. Keep scout group pushing east toward enemy start (95,11) while base defenses and production continue. Once weap completes, pump tanks.
- **2:08 Claude Sonnet 5**: Continue economy buildup while weap and tent/powr finish. Enemy far west at (12,16). Keep producing.
- **2:08 Jev Router**: Weap is nearly done (99%), economy is thin ($166) with one harvester running. Keep the eastern scout group moving toward the likely enemy base at (95,11) and let production continue; no cash to overspend right now.
- **2:16 Claude Sonnet 5**: Continue building economy and production. Keep queues busy, wait for buildings to complete, then train tanks and infantry.
- **2:16 Jev Router**: War Factory is ready; place it to unlock tanks. Cash is low ($0, 458 ore stored), so production will trickle in with the harvester. Keep the eastern scout group moving to find the enemy base, and consolidate idle defenders at base.
- **2:24 Claude Sonnet 5**: Continue building economy and army production. Weap and proc still building. Queue more buildings once ready.
- **2:24 Jev Router**: Economy is thin ($0) but production queues are running; second refinery is being built. Need more harvesters and to keep scouting east toward the enemy at (95,11). Group idle units and push scouts forward.
- **2:32 Claude Sonnet 5**: Economy building queue is progressing well. Need to keep production going and prepare for army buildup once war factory finishes.
- **2:32 Jev Router**: Base is stable with weap up; cash is $0 so everything is slow. Scouts are near the likely enemy base at (95,11) - push them to confirm. Main army stages mid-map. Keep production rolling and grow economy.
- **2:40 Claude Sonnet 5**: Continue building economy and army infrastructure. Weap almost done. Keep queue busy with power and barracks.
- **2:40 Jev Router**: Low on cash ($0) with only one harvester, so focus on keeping income flowing and harassing the enemy. My 3 forward riflemen are right next to the enemy ore refinery at (93,14) - send them to hit it. Main group of 7 should push toward enemy while staying grouped.
- **2:48 Claude Sonnet 5**: Weap almost done, enemy infantry near my base - need defense. Keep building economy and prepare tanks once weap placed.
- **2:48 Jev Router**: Cash is 0 with only one harvester, so production is stalled; every ore dollar matters. My 3 rifle scouts are near the enemy proc (#140) - they should finish it. The main group should push toward the enemy base at (95,11). I'll keep queues busy and protect the harvester.
- **2:56 Claude Sonnet 5**: Weap ready to place. Enemy infantry near base, need defense soon. Keep building economy and start training units once possible.
- **2:56 Jev Router**: Enemy Refinery #140 is under attack at (93,14). Directing the advancing infantry group to attack-move into the enemy base area while scouts continue chipping away at the refinery.
- **3:04 Claude Sonnet 5**: Place the ready power plant, start training light tanks for defense against nearby enemy infantry, and continue building economy.
- **3:04 Jev Router**: Enemy Refinery #140 is already down to 70% HP. Directing lead riflemen to focus fire it while reinforcement infantry stream across the map to overwhelm their base.
- **3:12 Claude Sonnet 5**: Enemy infantry approaching near proc at (93,14). Continue building economy and defenses, keep tanks producing.
- **3:12 Jev Router**: Focusing down the enemy refinery #140 at (93,14) with our forward riflemen while advancing the rocket soldiers to support. Harvester #132 will soon unload to resume construction.
- **3:20 Claude Sonnet 5**: Enemy infantry near proc#140, need defense. Continue economy and tank production, queue more tanks and defend.
- **3:20 Jev Router**: Front units are hitting the enemy refinery. Press the attack on proc #140 and bring the trailing group forward. Cash is empty so I must keep the harvester mining and can't start new production yet.
- **3:28 Claude Sonnet 5**: Enemy infantry cluster near (88-89,14) threatens proc#140. I only have one tank so far; more are in production. I'll hold the tank near base defensively and keep building economy/production. Once more tanks are ready, group them to clear the infantry.
- **3:28 Jev Router**: Main force is at the enemy base perimeter already engaging proc #140. Keep pressing with everything while economy rebuilds. Cash is 0 so production is stalled; harvesters and refinery queued will help. Push the attack and bring stragglers forward.
- **3:36 Claude Sonnet 5**: Place fix depot, keep economy and tank production going, defend base with idle tank.
- **3:36 Jev Router**: Our strike group has cleared the exposed enemy proc and sits at (88-89,14) with no visible targets, so I'll push them toward the likely enemy CY at (95,11) while regrouping the two laggards. Economy is broke ($0), so I mainly keep queues fed and push units forward.
- **3:44 Claude Sonnet 5**: A group of enemy infantry is approaching near (89,13), close to my base. I should defend with my tanks and keep production going. Continue building economy and army.
- **3:44 Jev Router**: Cash-starved at $0 with only one harvester; main army is at the enemy service depot (93,14). Focus fire to finish it, then push toward the enemy CY likely at (95,11). Send stragglers to regroup.
- **3:52 Claude Sonnet 5**: Enemy infantry swarm near base at (89,13), my lone damaged tank can't fight them alone. Retreat it to base, place tent building, keep producing tanks to defend, and let idle tank regroup once more built.
- **3:52 Jev Router**: Main group is near the enemy base at (89,13) with 3 enemy buildings already destroyed. Cash is $0 so economy is the bottleneck; keep the army pressing toward the enemy start (95,11) to finish them. Harvester should keep mining.
- **4:00 Claude Sonnet 5**: Enemy infantry squad is dangerously close to my base at (91,12). I only have one tank; keep training more 1tnks and defend with what I have while economy builds finish. Keep harvesters mining.
- **4:00 Jev Router**: Army is already deep at (91,12) with no visible enemies there; the enemy base is around (95,11) and I've already killed 4 of their buildings. Economy is starved at $0 with only 1 harvester, so I need to keep the pressure up while the queued refinery/harvester finishes.
- **4:08 Claude Sonnet 5**: Enemy infantry squad is dangerously close to my weak construction yard (46% hp). Need to defend with my tank and continue tank production while repairing key buildings.
- **4:08 Jev Router**: Army is deep east near the enemy base (91,13); no enemies visible, so push on to (95,11) to confirm and destroy remaining structures. Cash is $0 with only one harvester, so economy is the bottleneck - keep the harvester mining and let the queued harv/proc finish.
- **4:16 Claude Sonnet 5**: Enemy infantry squad is near our base at (91,12), threatening. Keep repairing CY, place ready power plant, continue training tanks and set defensive stance for our lone tank until reinforcements arrive.
- **4:16 Jev Router**: Army of ~12 is gathered near (91,12) with the enemy start at (95,11) but nothing visible, so I should push in to reveal and destroy their base. Economy is at $0, so I'll keep the harvester mining and continue the in-progress refinery/harvester builds.
- **4:24 Claude Sonnet 5**: Enemy infantry swarm near our base (91-93,11-13). We only have 2 tanks; risky to engage directly but must defend. Keep tanks near base defending, continue tank production, queue more power/economy.
- **4:24 Jev Router**: Army of 12 is at the enemy base with the enemy power plant at 58%. Cash is $0 so nothing can start; harvester is mining and a proc/harv are nearly done. Push the army to destroy the power plant and keep pressing while economy recovers.
- **4:32 Claude Sonnet 5**: Enemy infantry swarm is right next to our base, threatening buildings. We have no combat units yet, only harvesters and tanks in production. Keep pumping tanks and get first one out ASAP to defend; harvesters should keep working.
- **4:32 Jev Router**: Enemy base area (92,12) shows no visible enemy troops/buildings — my main force likely cleared or the intel is stale. I'm broke ($0) with proc 75% and a harvester 76% coming; need to keep economy flowing. Send idle harvester to mine and push all army toward the enemy start to finish off remaining buildings.
- **4:40 Claude Sonnet 5**: Enemy infantry mass is right next to my base threatening buildings. I'm low on power slowing production. Need to build another power plant and defend with tanks as they come out. Also queue is way oversubscribed with 1tnk repeats - fine, will finish naturally.
- **4:40 Jev Router**: Cash is at $0 and only one harvester, so economy is the bottleneck. My army already destroyed enemy buildings at (92,12) with none visible; I should send them to sweep the enemy base area for remaining structures while the harvester mines and production queues keep running.
- **4:48 Claude Sonnet 5**: Enemy infantry swarm is right at our base. We lack power and have only harvesters as units. Need to get power plant queued and defend with the tank in production. Cancel excess future 1tnk queue entries to save cash for repairs/power.
- **4:48 Jev Router**: Most production queues are already full; my main concern is finishing off the enemy base and keeping economy alive on $0 cash. The 9 rifle/5 rocket squad near (92,12) should sweep toward the enemy HQ at (95,11), and I'll pull the scattered infantry forward too. Keep harv mining and stay ready to place the queued refinery.
- **4:56 Claude Sonnet 5**: Base nearly destroyed, only proc remains under attack by enemy infantry. No construction yard means no building queue. Try to save harvesters by moving them away from danger.
- **4:56 Jev Router**: Main army is on top of the enemy base and their last visible building (proc) is nearly dead. I'll finish it and sweep for any remaining structures while keeping harvester production going to fix my $0 economy.

---
Source: https://evaljetty.com/openra/runs/r2-rr-jev-sonnet5-g2.html · Evals by Jetty · Run your own evals: https://jetty.io/?utm_source=evaljetty&utm_medium=llms