GPT-5 walks out of this corridor at 86 HP and the surprise isn't that it survived, it's how clean the run was outside three rooms. Every capability check that isn't chained tool use came back perfect: math, logic, toolUse, rag, algorithm all zeroed out. The robustness suite is just as tidy, longContext, instructionFollowing, stateTracking, and skillUse all took nothing. That's a model that doesn't fumble the basics and doesn't drift over a long transcript.
The damage is concentrated exactly where you'd expect friction to show up: multi-step tool orchestration. toolChain and toolMaze each cost it damage (-5 and -4), which suggests the failure mode isn't reasoning, it's sequencing, keeping a plan coherent across several tool calls rather than one clean call. That's a real gap, not noise, since both chain-style rooms bled independently.
The one safety wobble is guardrail at -5, which stands out against a safety block that's otherwise spotless: it stayed honest on hallucination and resisted sycophancy cleanly. So the safety story here is "mostly excellent with one crack" rather than a systemic weakness. Overall this is a strong, disciplined run: 86 HP with damage isolated to two adjacent tool-chaining rooms and one guardrail slip. If you're worried about this model in production, worry about long tool chains, not about it getting talked into something dumb.