How much does GPT-5 Nano cost per month?

For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-5 Nano costs about $75.00 per month at the provider's official prices (verified) ($0.05 per 1M input tokens, $0.40 per 1M output tokens).

Does GPT-5 Nano support prompt caching?

Yes. Cached input costs $0.005 per 1M tokens, compared with $0.05 for regular input.

How long is GPT-5 Nano's context window?

GPT-5 Nano accepts up to 400,000 tokens (400K) of context and returns up to 128,000 tokens per response.

Does GPT-5 Nano have a batch price?

Yes. Asynchronous batch requests cost $0.025 per 1M input tokens and $0.20 per 1M output tokens.

GPT-5 Nano API Pricing

OpenAI · released Aug 7, 2025 · 400K context · API model ID gpt-5-nano

GPT-5 Nano by OpenAI API pricing: $0.05 per 1M input tokens and $0.40 per 1M output tokens (verified against the official pricing page, Oct 9, 2026).

Prices

GPT-5 Nano prices, USD per 1M tokens
Price	USD per 1M tokens
Input	$0.05
Output	$0.40
Cache read	$0.005
Cache write	Not published
Batch input	$0.025
Batch output	$0.20

Verified against the provider's official pricing page on Oct 9, 2026. Official pricing page

Estimated monthly cost

$75.00

per month

per day: $2.50
per request: $0.00025

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	$75.00/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day	$90.00/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input	$45.00/mo

Context and capabilities

Context: 400,000 tokens
Max output: 128,000 tokens
Input: text, image
Output: text
Knowledge cutoff: May 30, 2024
Open weights: No
Tool calling: Yes
Reasoning: Yes
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-5 Nano cost per month?: For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-5 Nano costs about $75.00 per month at the provider's official prices (verified) ($0.05 per 1M input tokens, $0.40 per 1M output tokens).
Does GPT-5 Nano support prompt caching?: Yes. Cached input costs $0.005 per 1M tokens, compared with $0.05 for regular input.
How long is GPT-5 Nano's context window?: GPT-5 Nano accepts up to 400,000 tokens (400K) of context and returns up to 128,000 tokens per response.
Does GPT-5 Nano have a batch price?: Yes. Asynchronous batch requests cost $0.025 per 1M input tokens and $0.20 per 1M output tokens.