GPT-5 / o-series
OpenAI's flagship model + reasoning line
GPT-5 is OpenAI's 2025 flagship, unifying the fast GPT line with the o-series chain-of-thought reasoning models behind a single router that decides how much to think. It powers ChatGPT and the API across text, vision, and tool use, and anchors OpenAI's agentic push. The o-series (o1/o3 lineage) pioneered inference-time reasoning scaling.
Maker
OpenAI
Type
Multimodal + reasoning router
Runs on
Nvidia GPUs (Azure/Oracle/CoreWeave)
How it fits the stack
GPT-5 / o-series with what it depends on (above) and what it feeds (below). The figure renders as a crawlable diagram and upgrades to an interactive 3D graph as it scrolls into view.
GPT-5 / o-series in the AI stack. GPT-5 / o-series with its immediate upstream dependencies (top) and downstream dependents (bottom) in the AI value chain. Hover a node in 3D, or read the full relationships below.
Graph data (text) — 15 entities, 15 relationships
- GPT-5 / o-series —uses→ Alignment Methods (RLHF, Constitutional AI, DPO)
- GPT-5 / o-series —used by→ Evaluation & benchmark infrastructure
- GPT-5 / o-series —used by→ Frontier Evals (MMLU, GPQA, SWE-bench, ARC-AGI, HLE)
- GPT-5 / o-series —uses→ Synthetic data & distillation
- GPT-5 / o-series —used by→ Synthetic data & distillation
- GPT-5 / o-series —supplies→ Training Data & Web Corpus
- GPT-5 / o-series —uses→ Transformer / MoE Architecture
- Abridge / ambient clinical AI —uses→ GPT-5 / o-series
- Enterprise & Vertical AI (Palantir, Glean, Harvey, Sierra, Abridge) —depends on→ GPT-5 / o-series
- Financial Services AI —uses→ GPT-5 / o-series
- GitHub Copilot —uses→ GPT-5 / o-series
- Harvey AI —uses→ GPT-5 / o-series
- JPMorgan (LLM Suite / financial AI) —uses→ GPT-5 / o-series
- Palantir Technologies —uses→ GPT-5 / o-series
- GPT-5 / o-series —designs→ OpenAI
Depends on ↑ · 7
Feeds ↓ · 9
Context — capital, rivals, policy · · 1