Model details
GPT-5 Pro is the top-tier member of OpenAI's GPT-5 family, released on August 7, 2025 alongside the standard GPT-5, GPT-5 Mini, and GPT-5 Nano variants. It is positioned as an enhanced variant that leans on extended reasoning and parallel compute at inference time, aimed at complex, multi-step enterprise and research workloads where more deliberate deliberation produces more detailed and reliable answers. The broader GPT-5 line is marketed by OpenAI as its smartest and most capable system yet, with built-in thinking that delivers expert-level intelligence, and GPT-5 Pro sits at the upper end of that capability range for users who need deeper analysis than the base model offers.
As a closed, commercially hosted model from OpenAI, GPT-5 Pro is delivered through ChatGPT and the OpenAI API rather than as open weights, and it inherits the unified, reasoning-first design that defines the GPT-5 generation. Within that generation, it represents the higher-compute, higher-depth option, complementing the faster, lighter Mini and Nano variants that prioritize low latency or cost. For practitioners, this makes GPT-5 Pro a natural fit for ambitious single-turn questions, ambiguous problem decomposition, and research-style reasoning tasks, while lighter GPT-5 siblings remain better suited to high-volume or latency-sensitive pipelines.
Transparent token rates
Rates are shown per one million tokens. Combined means one million input plus one million output tokens.
OpenAI
We are introducing GPT‑5, our best AI system yet. GPT‑5 is a significant leap in intelligence over all our previous models, featuring state-of-the-art performance across coding, math, writing, health, visual perception, and more.
OpenAI
Immunologist Dr. Oral Alpan is using GPT-5 Pro to surface new uses for existing FDA-approved drugs by starting from real-world clinical vignettes and working backward to mechanism. A patient with severe eczema and Food Protein Induced Enterocolitis Syndrome (FPIES) stopped reacting to wheat after beginning dupilumab, t
DevPass (LLM Gateway)
A July 2026 third-party benchmark survey from nexos.ai explicitly identifies GPT-5 Pro as the top recommendation for the hardest reasoning, math, science, and coding tasks, alongside GPT-5 Thinking. The article distinguishes Pro from GPT-5 Thinking and GPT-5 Instant (the default ChatGPT experience), and from lower-cost The same benchmark review notes that scores vary depending on reasoning effort, tool access, prompt setup, and whether results are vendor-reported or independently reproduced — a methodological caveat relevant when evaluating any benchmark claim about Pro. The piece aggregates public OpenAI benchmark results and indepe
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