What it is: GPT-5 is the flagship large language model from OpenAI, released in August 2025. It powers ChatGPT across all tiers and is widely considered the most capable frontier model from OpenAI as of 2026.
Who it is for: Anyone using ChatGPT, since GPT-5 (or its variants — Mini, Nano) is what you’re talking to.
Best if: You’re curious about the specifics of OpenAI’s current flagship model.
Skip if: You’re happy using ChatGPT and don’t need to know the model name. Want one practical AI workflow every morning? Subscribe to our free daily newsletter.
What is GPT-5?
GPT-5 is the latest in OpenAI‘s flagship language model series, released August 2025. It succeeded GPT-4 (launched March 2023) and the GPT-4 Turbo / GPT-4o variants that followed. GPT-5 is what powers ChatGPT across free, Plus, Pro, Business, and Enterprise tiers.
OpenAI ships GPT-5 in multiple sizes: GPT-5 (the main model), GPT-5 mini (faster, cheaper), GPT-5 nano (lightweight). The original o-series reasoning models (o1, o3) have been folded into GPT-5’s reasoning mode — when GPT-5 detects a hard problem, it spends more compute thinking through it. That unified design is the most user-noticeable change from GPT-4.
Why does GPT-5 matter?
GPT-5 is the model OpenAI bet would re-establish their frontier lead after Anthropic and Google had closed in during 2024. Independent benchmarks largely confirmed this: GPT-5 outperforms GPT-4 by significant margins on math, coding, and reasoning tasks; competes with Claude 4.5 Sonnet and Gemini 3 Pro on most evaluations; and has industry-leading agentic capabilities.
For users, GPT-5 represents the integration of features that previously required separate models: long-context reasoning (formerly o-series only), multimodal input (image, audio, video), web browsing, code interpretation, and tool use — all in one model. You don’t pick between “the smart slow one” and “the fast one” anymore.
How do you use GPT-5?
You use GPT-5 whenever you use ChatGPT. Free tier gets access with usage caps; Plus, Pro, Business, and Enterprise tiers get higher limits and access to GPT-5 in extended-reasoning modes.
For developers, GPT-5 is available via the OpenAI API. Pricing in 2026: roughly $5-10 per million input tokens and $20-30 per million output tokens (subject to change). GPT-5 mini and nano are cheaper for cost-sensitive applications. Most production AI features in mainstream apps now run on GPT-5 or competing frontier models.
Related terms
Learn more on Beginners in AI
Sources and further reading
Last reviewed: May 2026. AI terminology evolves quickly — verify specifics on the official source pages above.
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