# GPT-5.4 nano

> OpenAI's cheapest GPT-5.4-class model — 400K context, text + image in, built for high-volume classification, extraction, and sub-agents.

- Maker: OpenAI
- Line: GPT Nano
- Canonical page: https://ai-tldr.dev/models/gpt-5-4-nano/
- Updated: 2026-06-18

## In short

GPT-5.4 nano is the smallest and cheapest model in OpenAI's GPT-5.4 line, released on March 17, 2026 alongside GPT-5.4 mini. OpenAI positions it as "our cheapest GPT-5.4-class model for simple high-volume tasks" — the variant to reach for when speed and cost matter more than deep reasoning. It has a 400K-token context window and costs $0.20 per million input tokens and $1.25 per million output tokens.

## Facts

| Fact | Value | Source |
| --- | --- | --- |
| Context window | 400K (max output 128K) | [1] |
| Input price | $0.20 / 1M tokens (cached $0.02 / 1M tokens) | [2] |
| Output price | $1.25 / 1M tokens | [2] |
| Licence | Proprietary · API only | [1] |
| Released | 17 March 2026 | [3] |
| Knowledge cutoff | August 31, 2025 | [1] |

## Sources

1. [GPT-5.4 nano — OpenAI API model page](https://developers.openai.com/api/docs/models/gpt-5.4-nano)
2. [OpenAI API pricing](https://developers.openai.com/api/docs/pricing)
3. [Introducing GPT-5.4 mini and nano — OpenAI announcement](https://openai.com/index/introducing-gpt-5-4-mini-and-nano/)

## Overview

GPT-5.4 nano is the smallest and cheapest model in OpenAI's GPT-5.4 line, released on March 17, 2026 alongside GPT-5.4 mini. OpenAI positions it as "our cheapest GPT-5.4-class model for simple high-volume tasks" — the variant to reach for when speed and cost matter more than deep reasoning. It is recommended for classification, data extraction, ranking, and coding sub-agents that handle simpler supporting work inside a larger system.

GPT-5.4 nano carries the same 400,000-token context window as GPT-5.4 mini and can generate up to 128,000 output tokens. It accepts both text and image input and returns text, and supports reasoning, function calling, structured outputs, and streaming. Its knowledge cutoff is August 31, 2025. OpenAI describes it as a significant upgrade over the previous GPT-5 nano. The model is identified in the API as gpt-5.4-nano, with the dated snapshot gpt-5.4-nano-2026-03-17.

Pricing is $0.20 per million input tokens, $0.02 per million cached input tokens, and $1.25 per million output tokens. GPT-5.4 nano launched in the OpenAI API and is also available through Codex and ChatGPT. As a closed, API-served model it has no published weights or parameter count, so the page below reports only specifications OpenAI has documented.

## Pricing

- Input: $0.20 / 1M tokens per 1M tokens
- Cached input: $0.02 / 1M tokens per 1M tokens
- Output: $1.25 / 1M tokens per 1M tokens

Standard processing tier. GPT-5.4 nano is roughly 4x the price of GPT-5 nano. A Batch API tier is also available.

Source: https://developers.openai.com/api/docs/pricing

## Strengths

- Lowest price in the GPT-5.4 family at $0.20 input / $1.25 output per 1M tokens, with cached input at $0.02 per 1M for repeated prompts
- Large 400K-token context window and 128K max output, matching GPT-5.4 mini despite the lower cost
- Optimized for low latency and high throughput, making it well suited to high-volume production pipelines
- Accepts text and image input, and supports function calling, structured outputs, streaming, and configurable reasoning effort
- A meaningful upgrade over the prior GPT-5 nano while staying in the cheapest tier

## Best for

- Classification and routing of large request volumes
- Structured data extraction from documents and unstructured text
- Ranking and scoring tasks where many candidates must be evaluated cheaply
- Coding sub-agents that handle simpler supporting tasks within a larger orchestration
- Latency-sensitive, cost-sensitive production workloads that don't need a flagship reasoning model

## How to access

- [OpenAI](https://developers.openai.com/api/docs/models/gpt-5.4-nano) — model id `gpt-5.4-nano`
- [OpenRouter](https://openrouter.ai/openai/gpt-5.4-nano) — model id `openai/gpt-5.4-nano`

## GPT Nano versions

- GPT-5.4 nano (17 March 2026) — this page
- [GPT-5 nano](https://ai-tldr.dev/models/gpt-5-nano/) (7 August 2025)

## FAQ

### What is GPT-5.4 nano?

GPT-5.4 nano is the smallest and cheapest model in OpenAI's GPT-5.4 line, released on March 17, 2026. OpenAI describes it as "our cheapest GPT-5.4-class model for simple high-volume tasks" such as classification, data extraction, ranking, and coding sub-agents, where speed and cost matter more than deep reasoning.

### How much does GPT-5.4 nano cost?

GPT-5.4 nano costs $0.20 per million input tokens and $1.25 per million output tokens, with cached input at $0.02 per million tokens on the standard tier. That makes it the lowest-priced model in the GPT-5.4 family — about four times the price of the older GPT-5 nano.

### What is the context window and max output of GPT-5.4 nano?

GPT-5.4 nano has a 400,000-token context window and can generate up to 128,000 output tokens in a single response. Its knowledge cutoff is August 31, 2025.

### How is GPT-5.4 nano accessed, and does it support images?

GPT-5.4 nano is available through the OpenAI API (model ID gpt-5.4-nano), as well as Codex and ChatGPT. It accepts text and image input and returns text, and supports reasoning, function calling, structured outputs, and streaming.

## Links

- [Introducing GPT-5.4 mini and nano — OpenAI announcement](https://openai.com/index/introducing-gpt-5-4-mini-and-nano/)
- [GPT-5.4 nano — OpenAI API model page](https://developers.openai.com/api/docs/models/gpt-5.4-nano)
- [OpenAI API documentation](https://developers.openai.com/api/docs/models)
- [OpenAI API pricing](https://developers.openai.com/api/docs/pricing)
- [GPT-5.4 nano on OpenRouter](https://openrouter.ai/openai/gpt-5.4-nano)
- [OpenAI releases GPT-5.4 mini and nano — 9to5Mac](https://9to5mac.com/2026/03/17/openai-releases-gpt-5-4-mini-and-nano-its-most-capable-small-models-yet/)
- [GPT-5.4 mini and nano on Azure AI Foundry — Microsoft](https://techcommunity.microsoft.com/blog/azure-ai-foundry-blog/introducing-openai%E2%80%99s-gpt-5-4-mini-and-gpt-5-4-nano-for-low-latency-ai/4500569)
- [GPT-5.4 — Wikipedia](https://en.wikipedia.org/wiki/GPT-5.4)

Source: AI/TLDR LLM registry, https://ai-tldr.dev/models/gpt-5-4-nano/