How much does GPT-4o cost per month?

For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-4o costs about $2,250 per month at the provider's official prices (verified) ($2.50 per 1M input tokens, $10.00 per 1M output tokens).

Does GPT-4o support prompt caching?

Yes. Cached input costs $1.25 per 1M tokens, compared with $2.50 for regular input.

How long is GPT-4o's context window?

GPT-4o accepts up to 128,000 tokens (128K) of context and returns up to 16,384 tokens per response.

Does GPT-4o have a batch price?

Yes. Asynchronous batch requests cost $1.25 per 1M input tokens and $5.00 per 1M output tokens.

GPT-4o API Pricing

OpenAI · released May 13, 2024 · 128K context · API model ID gpt-4o

GPT-4o by OpenAI API pricing: $2.50 per 1M input tokens and $10.00 per 1M output tokens (verified against the official pricing page, Oct 9, 2026).

Prices

GPT-4o prices, USD per 1M tokens
Price	USD per 1M tokens
Input	$2.50
Output	$10.00
Cache read	$1.25
Cache write	Not published
Batch input	$1.25
Batch output	$5.00

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

Estimated monthly cost

$2,250

per month

per day: $75.00
per request: $0.0075

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	$2,250/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day	$3,750/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input	$2,850/mo

Context and capabilities

Context: 128,000 tokens
Max output: 16,384 tokens
Input: text, image, pdf
Output: text
Knowledge cutoff: September 2023
Open weights: No
Tool calling: Yes
Reasoning: No
Structured outputs: Yes

Capabilities and limits as listed by models.dev.

Similarly priced models

Gemini 3.1 Pro Preview · $2.00 in / $12.00 out
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GPT-6.1 Sol · $2.00 in / $10.00 out
Kimi K3 · $3.00 in / $15.00 out

Price history

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

Questions

How much does GPT-4o cost per month?: For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-4o costs about $2,250 per month at the provider's official prices (verified) ($2.50 per 1M input tokens, $10.00 per 1M output tokens).
Does GPT-4o support prompt caching?: Yes. Cached input costs $1.25 per 1M tokens, compared with $2.50 for regular input.
How long is GPT-4o's context window?: GPT-4o accepts up to 128,000 tokens (128K) of context and returns up to 16,384 tokens per response.
Does GPT-4o have a batch price?: Yes. Asynchronous batch requests cost $1.25 per 1M input tokens and $5.00 per 1M output tokens.