GPT 5 Nano

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GPT-5 Nano is OpenAI's lightest GPT-5 model for ultra-low-latency responses and production applications at minimal cost.
GPT-5 Nano is OpenAI's lightest GPT-5 model for ultra-low-latency responses and production applications at minimal cost.

GPT 5 Nano is an AI model from OpenAI, available on ZeroTwo. It costs $0.05 per million input tokens and $0.40 per million output tokens, has a 400,000-token context window, can return up to 32,000 output tokens, and has a knowledge cutoff of September 2024.

Intelligence
Fair
Speed
Very Fast
Price
$0.05 • $0.40
Input • Output
Input
Text, Image
Output
Text

GPT-5 Nano is OpenAI's lightest GPT-5 model for ultra-low-latency responses and production applications at minimal cost.

400,000 context window
32,000 max output tokens
September 2024 knowledge cutoff
Pricing
Pricing is based on the number of tokens used. For tool-specific models, like search and computer use, there's a fee per tool call. See details in the pricing page.
Text tokens
Per 1M tokens
∙
Batch API price
Input
$0.05
Cached input
$0.005
Output
$0.40
Quick comparison
Input
Cached input
Output
GPT 5 Nano
$0.05
Modalities
Text
Input and output
Image
Input only
Audio
Not supported
Endpoints
Chat Completions
v1/chat/completions
Responses
v1/responses
Batch
v1/batch
Realtime
v1/realtime
Assistants
v1/assistants
Fine-tuning
v1/fine-tuning
Embeddings
v1/embeddings
Image Generation
v1/images/generations
Image Edit
v1/images/edits
Speech Generation
v1/audio/speech
Transcription
v1/audio/transcriptions
Translation
v1/translations
Moderation
v1/moderations
Completions (legacy)
v1/completions
Features
Streaming
Supported
Function calling
Supported
Structured outputs
Supported
Fine-tuning
Supported
Distillation
Not supported
Fast response
Not supported
Cost efficient
Supported
Tools
Tools supported by this model when using the Responses API.
Web search
Not supported
Code interpreter
Supported
File search
Not supported
Image generation
Supported
MCP
Not supported
Snapshots
Snapshots let you lock in a specific version of the model so that performance and behavior remain consistent. Below is a list of all available snapshots and aliases for GPT 5 Nano.
gpt-5-nano

Questions

How much does GPT 5 Nano cost?

GPT 5 Nano is priced at $0.05 per million input tokens and $0.40 per million output tokens, with cached input at $0.005 per million. On ZeroTwo it is included in your plan's credits rather than billed per token.

What is GPT 5 Nano's context window?

GPT 5 Nano accepts up to 400,000 tokens of context and can return up to 32,000 output tokens.

What is GPT 5 Nano's knowledge cutoff date?

GPT 5 Nano has a training knowledge cutoff of September 2024. For anything later than that, use a model with web search enabled.

Can I use GPT 5 Nano for free?

You can try GPT 5 Nano on ZeroTwo's free plan, which includes a monthly credit allowance across every model in the catalogue. Heavier use moves to a paid plan rather than a per-token bill.