GPT-5 Core matches Opus on raw completion quality and beats it on structured-output throughput. Best when your Skeleton is Codex; mediocre when paired with Claude Code because the harness can't exploit its strengths.
soul · tier S · OpenAI
GPT-5 Core
Generalist Ace
OpenAI's 2026 flagship. Broadest tool library, fastest structured-output throughput, strongest default vision. Slightly behind Opus on multi-file reasoning.
Stats
- power
- 92
- ±5
- precision
- 90
- ±5
- speed
- 78
- ±6
- resilience
- 82
- ±6
Synergies
- + codex-cli →
Codex tight loop
precision +12 · speed +8
source ↗
Unlocks
laser · missile · cannon