---
id: "entity-gpt-5-5"
type: "entity"
entityType: "product"
canonicalName: "GPT-5.5"
aliases: ["GPT 5.5", "5.5"]
source_timestamps: ["00:00:01", "00:09:36"]
tags: ["openai", "frontier-model"]
related: ["concept-moving-the-floor", "entity-codex", "claim-gpt-5-5-superiority", "concept-can-it-carry"]
sources: ["s26-gpt55-claude-gemini"]
sourceVaultSlug: "s26-gpt55-claude-gemini"
originDay: 26
---
# GPT-5.5

## Profile
OpenAI's claimed latest frontier model and the central subject of this vault. It is described as 'resetting the bar' for AI capabilities by excelling at complex, multi-step execution, risk management, and data hygiene. It operates highly effectively within the [[entity-codex|Codex]] environment.

## Notable Performance Claims
- **Dingo (executive judgment):** 87.3 vs Opus 67.0 — see [[claim-gpt-5-5-superiority]].
- **Splash Brothers (data migration):** First to catch all planted traps — see [[claim-gpt-5-5-caught-traps]].
- **TerminalBench:** 82% (per OpenAI) — see [[entity-terminalbench]].

## Capabilities & Limits
- ✅ Strong at: file ops, code, multi-step execution, risk-aware judgment, semantic trap detection.
- ❌ Weak at: blank-canvas visual taste (see [[concept-visual-taste-vs-density]]), backend hygiene (enum normalization, service code preservation; see [[concept-production-trust]]).

## Routing Defaults
Default choice for [[action-route-complex-execution]]. See [[action-mockup-to-code]] for hybrid use with [[entity-claude-opus-4-7|Claude Opus]].

## External Verifiability
**Not publicly confirmed as a released OpenAI product** as of the enrichment cutoff. As of April 2026, OpenAI's documented frontier models are o1/o3 and GPT-4o variants. Treat all GPT-5.5-specific claims as speaker projection.