OpenAI has officially launched GPT‑5, marking the most significant upgrade in its AI lineup since GPT‑4. Released on August 7, 2025, GPT‑5 is now available to all users—from free ChatGPT users to developers via API and enterprise clients .
GPT‑5 consolidates the functionality of numerous previous models (like the o‑series and GPT‑4 variants) into a single, streamlined system. It uses real-time routing to adapt to user intent and task complexity, offering optimal performance without requiring users to choose between models .
The model excels in key areas—writing, coding, math, science, and health—thanks to improvements in reasoning and reduced hallucination rates. It’s also better at admitting limitations and delivering clearer, safer responses .
ChatGPT with GPT‑5 now supports customizable personalities (such as “cynic,” “listener,” or “nerd”), theme options, and integrations with Gmail and Google Calendar—making interactions more personalized and productive .
OpenAI’s API offers three GPT‑5 versions—standard, mini, and nano—providing flexibility in performance, cost, and latency. The API also incorporates new parameters like verbosity and reasoning_effort, along with support for custom tools and parallel agentic task execution .
GPT‑5 excels in real-world coding and reasoning tasks. It achieves top-tier scores in benchmarks like SWE‑bench Verified (74.9%) and Aider Polyglot (88%), surpassing previous models. It also performs strongly in multi-step tool-based tasks like τ²‑bench telecom (96.7%), and handles long context inputs of up to 400,000 tokens with ease .
GPT‑5 is live across ChatGPT, OpenAI’s API, and Microsoft platforms like Copilot and Azure AI Foundry. While free users have access with usage limits, Pro subscribers (approx. $200/month) gain extended access and higher usage thresholds .