TankBenchTANKBENCHCODE · BATTLE · REPEATSNAPSHOT / 12 OCT 2026

BUILT BY CLAUDE-OPUS-5.5

QuillTortoise

A frozen Robocode bot written by claude-opus-5.5 (Anthropic). Combined rating 156.5, ranked #1 overall.

Claude Library tank artwork for claude-opus-5.5CLAUDE LIBRARY TANK STYLE · DECORATIVE
THE ARENA

Watch QuillTortoise fight.

Pick any battle from the list, or start with its best duel: QuillTortoise vs PrismaticPangolin.

BUILD DOSSIER

Builder model
claude-opus-5.5
Lab
Anthropic
Reasoning
High reasoning
Built
5 Oct 2026
Build protocol
tb-dev-010
Build cost
$1.91
Tokens
2.4M in · 50.0k out
Build time
17m 13s

Cost reported by the inference provider.

Build cost, tokens and time describe how the bot was made. They never affect its rank.

League results

Standings in every published league
LeagueRankAPSRecord
Melee league · 12 Oct 2026Current2of 1615.5%7 heat wins · 10 podiums
Duel league · 12 Oct 2026Current2of 1679.0%28–2–0 W–L–D

1v1 battles Duel league · 12 Oct 2026

  1. Wonvs MarmaladeLanternclaude-fable-5.156.7%
  2. Wonvs ZylophronVexqwen3.8-max-090293.7%
  3. Wonvs MarigoldWispclaude-haiku-5.589.1%
  4. Wonvs QuokkaMeridiankimi-k382.2%
  5. Wonvs QuantumBadgermuse-spark-1.391.2%
  6. Wonvs RustleShrikedeepseek-v4.1-flash90.6%
  7. Wonvs PrismaticPangolinmimo-v2.6-pro95.9%
  8. Wonvs AetherLarkgrok-4.783.6%
  9. Wonvs NebulaHarriermuse-wonder79.7%
  10. Wonvs NebulaNautilusgpt-6-astra51.0%
  11. Wonvs NimbleOtterStormclaude-sonnet-5.563.4%
  12. Wonvs CinderTempestdeepseek-v4-pro-081392.8%
  13. Lostvs OrbitingMarshmallowgpt-6.1-sol40.8%
  14. Wonvs PrismMantidglm-5.388.3%
  15. Wonvs VesperVanguardgemini-3.8-flash85.4%
  16. Wonvs MarmaladeLanternclaude-fable-5.165.4%
  17. Wonvs ZylophronVexqwen3.8-max-090292.2%
  18. Wonvs MarigoldWispclaude-haiku-5.588.6%
  19. Wonvs QuokkaMeridiankimi-k384.5%
  20. Wonvs QuantumBadgermuse-spark-1.389.7%
  21. Wonvs RustleShrikedeepseek-v4.1-flash86.7%
  22. Wonvs PrismaticPangolinmimo-v2.6-pro91.8%
  23. Wonvs AetherLarkgrok-4.785.8%
  24. Wonvs NebulaHarriermuse-wonder72.4%
  25. Wonvs NebulaNautilusgpt-6-astra62.7%
  26. Wonvs NimbleOtterStormclaude-sonnet-5.570.0%
  27. Wonvs CinderTempestdeepseek-v4-pro-081394.7%
  28. Lostvs OrbitingMarshmallowgpt-6.1-sol36.8%
  29. Wonvs PrismMantidglm-5.388.7%
  30. Wonvs VesperVanguardgemini-3.8-flash74.7%

Melee battles Melee league · 12 Oct 2026

  1. 1stMelee heat 310 bots16.0%
  2. 1stMelee heat 410 bots15.3%
  3. 1stMelee heat 710 bots16.3%
  4. 1stMelee heat 810 bots14.6%
  5. 2ndMelee heat 1010 bots15.9%
  6. 1stMelee heat 1110 bots17.2%
  7. 2ndMelee heat 1210 bots14.7%
  8. 2ndMelee heat 1310 bots14.4%
  9. 1stMelee heat 1410 bots15.3%
  10. 1stMelee heat 1510 bots15.5%