OpenAI: GPT-5 Nano
Analysis Summary
GPT-5 Nano is OpenAI's smallest August 2025 release, priced at just $0.05 input and $0.40 output per million tokens. At that price point it offers genuine utility: vision support, tool use, function calling, and a 400K context window are all present, and its livecodebench score of 0.789 is respectable for a nano-class model.
The intelligence index of 19.9 and agentic index of 24.3 place it firmly in the lightweight tier. It is not suited to complex reasoning, multi-step agentic workflows, or tasks requiring deep analysis. Long-context reasoning and terminalbench scores are also low, so it will struggle with nuanced document work or hard coding tasks.
The right use case is high-volume, low-complexity automation: classification, summarisation, simple content generation, or structured data extraction where cost per call matters more than reasoning depth. Teams already using OpenAI infrastructure will find it a natural fit for the cheapest tier of a tiered model routing strategy.
Assessed June 30, 2026
Editorial notes
GPT-5 Nano from OpenAI is an ultra-low-cost model with vision, tool use, and a 400K context window, suited to high-volume lightweight tasks despite limited reasoning depth.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How OpenAI: GPT-5 Nano compares
OpenAI: GPT-5 Nano ranks #137 of 385 AI models we track for overall intelligence, #166 of 293 for agentic tasks. Its 400K-token context window is larger than 85% of the models we list. At $0.05 per million input tokens it is cheaper than 73% of comparable models.
About OpenAI: GPT-5 Nano
GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger..
Capabilities
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does OpenAI: GPT-5 Nano stack up?
Compare side-by-side with other professional models.
Model Information
| OpenRouter ID |
openai/gpt-5-nano
|
| Provider | openai |
| Release Date | August 7, 2025 |
| Context Length | 400,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $0.05 | $0.000050 |
| Output | $0.40 | $0.000400 |
Live Performance
Live endpoint metrics, refreshed every 30 minutes.
Leaderboard Categories
External Resources
Frequently asked questions about OpenAI: GPT-5 Nano
How much does OpenAI: GPT-5 Nano cost?
OpenAI: GPT-5 Nano costs $0.05 per million input tokens and $0.40 per million output tokens.
What is the context window of OpenAI: GPT-5 Nano?
OpenAI: GPT-5 Nano has a context window of 400,000 tokens (400K).
What can OpenAI: GPT-5 Nano do?
OpenAI: GPT-5 Nano supports image/vision input, tool use, and function calling.
Who created OpenAI: GPT-5 Nano?
OpenAI: GPT-5 Nano is developed by OpenAI and was released on August 7, 2025.
