How much does GPT-4.1 nano cost per month?

For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-4.1 nano costs about $90.00 per month at OpenAI's list prices ($0.10 per 1M input tokens, $0.40 per 1M output tokens).

Does GPT-4.1 nano support prompt caching?

Yes. Cached input costs $0.025 per 1M tokens, compared with $0.10 for regular input.

How long is GPT-4.1 nano's context window?

GPT-4.1 nano accepts up to 1,047,576 tokens (1.05M) of context and returns up to 32,768 tokens per response.

GPT-4.1 nano API Pricing

OpenAI has deprecated this model. The price is kept here for reference; check the provider's documentation before building on it.

OpenAI · released Apr 14, 2025 · 1.05M context · API model ID gpt-4.1-nano

GPT-4.1 nano by OpenAI API pricing: $0.10 per 1M input tokens and $0.40 per 1M output tokens (provider list price via models.dev, Oct 10, 2026).

Prices

GPT-4.1 nano prices, USD per 1M tokens
Price	USD per 1M tokens
Input	$0.10
Output	$0.40
Cache read	$0.025
Cache write	Not published

OpenAI's list price for its own API, as compiled by models.dev and checked Oct 10, 2026, 09:00 UTC. Prices on cloud platforms and resellers can differ. Provider documentation

Estimated monthly cost

$90.00

per month

per day: $3.00
per request: $0.0003

Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.

Compare this workload across models

Monthly cost by workload

Workload	Per month
Chatbot1,000 in / 500 out tokens, 10,000 requests a day	$90.00/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day	$150.00/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input	$84.00/mo

Context and capabilities

Context: 1,047,576 tokens
Max output: 32,768 tokens
Input: text, image
Output: text
Knowledge cutoff: April 2024
Open weights: No
Tool calling: Yes
Reasoning: No
Structured outputs: Yes

Capabilities and limits as listed by models.dev.

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Price history

No price changes since we started tracking on Oct 8, 2026.

Questions

How much does GPT-4.1 nano cost per month?: For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-4.1 nano costs about $90.00 per month at OpenAI's list prices ($0.10 per 1M input tokens, $0.40 per 1M output tokens).
Does GPT-4.1 nano support prompt caching?: Yes. Cached input costs $0.025 per 1M tokens, compared with $0.10 for regular input.
How long is GPT-4.1 nano's context window?: GPT-4.1 nano accepts up to 1,047,576 tokens (1.05M) of context and returns up to 32,768 tokens per response.