Codex's +12 Precision with GPT-5 is the second-largest synergy in the arena — only Opus/Claude Code beats it. Running Codex with Opus is wasteful; the harness overrides the thinking stream.
skeleton · tier S · OpenAI
Codex CLI
Agent Fleet Controller
OpenAI's first-party agent runner. Parallel-agent-spawning is the trick. Tuned for GPT-5, penalizes other Souls.
Stats
- power
- 80
- ±4
- precision
- 84
- ±5
- speed
- 88
- ±4
- resilience
- 78
- ±6
Synergies
- + gpt-5-core →
Codex tight loop — parallel agents, shared context
precision +12 · speed +8
Unlocks
missile · cannon · railgun