GPT 5 Nano is OpenAI's fastest, most cost-efficient version of GPT 5, built for summarization and classification, and the successor to GPT-4.1 nano.
Capabilities, design details, and architectural traits
GPT 5 Nano is documented as the fastest, most cost-efficient version of GPT 5. It is built for summarization and classification work, where speed matters more than deep, multi-step reasoning.
| Trait | Detail |
|---|---|
| Defining purpose | The fastest, most cost-efficient version of GPT 5, built for summarization and classification tasks rather than deep reasoning. |
| Documented lineage | Positioned as the successor to GPT-4.1 nano, with OpenAI recommending GPT 5 Nano over GPT-4.1 nano for more complex tasks. |
| Family tier | Released as the smallest of three GPT 5 sizes, alongside gpt-5 and gpt-5-mini, introduced together so developers can trade off performance, cost, and latency. |
Independent evaluations · Artificial Analysis
Evaluate specifications, pricing, and independent benchmark indices
| Model Details | |||
|---|---|---|---|
| General Info | |||
| Provider | OpenAI | Anthropic | Anthropic |
| Release Date | August 7, 2025 | July 24, 2026 | June 9, 2026 |
| Knowledge Cutoff | May 2024 | May 2026 | - |
| Context & Limits | |||
| Context Window | 400K | 1M Best Context Window | 1M Best Context Window |
| Pricing (per 1M tokens) | |||
| Input Pricing | $0.05 Best Input Pricing | $5 | $10 |
| Output Pricing | $0.40 Best Output Pricing | $25 | $50 |
| Modalities | |||
| Inputs | textimagefile | textimage | textimagefile |
| Outputs | text | text | text |
| Benchmarks (0-100) | |||
| Intelligence Index | 20.1 | 63.1 Best Intelligence Index | 62.1 |
| Coding Index | - | 78.0 Best Coding Index | 76.5 |
| Agentic Index | - | 59.2 Best Agentic Index | 56.6 |
Graduate-level reasoning and expert Q&A evaluation.
Extremely difficult logical reasoning and knowledge.
Logical reasoning over long context windows.
Independent evaluation data provided by Artificial Analysis. To view the latest benchmarks and full details, visit their official site.
