Quick Summary
- GPT‑5 is OpenAI’s newest flagship model with built‑in thinking for better accuracy, coding, and tool use.
- GPT‑5 Thinking is a selectable mode in ChatGPT that takes longer but reasons deeper—great for complex, high‑stakes tasks.
- In the API, developers also get reasoning controls like
reasoning_effort: minimal|low|medium|highand a newverbosityswitch.
What exactly is GPT‑5 ?
GPT‑5 boosts reliability, speed, and reasoning versus previous models. It’s stronger at coding and long tool chains, and handles longer context (up to ~400K tokens in the API). In ChatGPT, it’s the new default for logged‑in users.
Key upgrades at a glance
- Built‑in thinking so ChatGPT can go deeper when needed.
- Coding & agents: better at multi‑step tool calling and end‑to‑end tasks.
- Long context: handles very long inputs and keeps details straight.
- Controls for devs: tune reasoning effort and verbosity; choose
gpt‑5,gpt‑5‑mini, orgpt‑5‑nanoin API.
GPT‑5 vs GPT‑5 Thinking — What’s the difference?
Same brain, different pace.
- GPT‑5 (default): Fast, accurate, and balanced. Best for everyday work—content, summaries, code snippets, brainstorming, research with quick turnarounds.
- GPT‑5 Thinking: Slower on purpose. It spends extra time thinking through steps and edge cases. Use it when the answer must be extra reliable—strategy, complex analysis, high‑impact emails/presentations, modeling, or safety‑critical plans.
- GPT‑5 Thinking Pro (select tiers): A higher‑duty version of Thinking for power users and teams.
How to choose:
- Need speed? GPT‑5.
- Need deep, methodical reasoning and fewer mistakes? GPT‑5 Thinking.
Who gets it and how to access
- ChatGPT: GPT‑5 is rolling out to Free, Plus, Pro, and Team; Enterprise/Edu next. In the model picker, choose GPT‑5 or GPT‑5 Thinking (some tiers also see Thinking Pro).
- API: Use
gpt‑5family for maximum performance (withreasoning_effort&verbosity), orgpt‑5‑chat‑latestfor the fast chat‑tuned model.
Real‑life examples
- Quick: “Summarize this 20‑page PDF and draft 3 email subject lines.” → GPT‑5.
- Deep: “Stress‑test a 90‑day go‑to‑market plan with risk trees and scenario analysis.” → GPT‑5 Thinking.
- Dev/API: “Generate a React dashboard, call multiple APIs, and handle retries.” → GPT‑5 (API with high
reasoning_effort).
Key facts
- OpenAI released GPT‑5 on August 7, 2025.
- GPT‑5 is now the default model in ChatGPT for logged‑in users.
- Users on paid tiers can manually select GPT‑5 Thinking for deeper reasoning.
- Developers can tune reasoning effort (including minimal) and verbosity in the API.
- API context length reaches ~400K tokens across the GPT‑5 family.
FAQ
Q: Does GPT‑5 always “think” more?
A: It thinks more when needed. For the fastest results, keep the default; for tougher problems, pick GPT‑5 Thinking.
Q: Is GPT‑5 better for coding than earlier models?
A: Yes—benchmarks and early partner feedback show higher accuracy and better tool‑calling for end‑to‑end tasks.
Q: I’m not technical—what should I pick?
A: If speed matters most, use GPT‑5. If the outcome is high‑stakes or complex, switch to GPT‑5 Thinking.