How much does GPT-4 cost per month?

For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-4 costs about $18,000 per month at OpenAI's list prices ($30.00 per 1M input tokens, $60.00 per 1M output tokens).

Does GPT-4 support prompt caching?

No cache read price is published for GPT-4.

How long is GPT-4's context window?

GPT-4 accepts up to 8,192 tokens (8.2K) of context and returns up to 8,192 tokens per response.

GPT-4 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 Nov 6, 2023 · 8.2K context · API model ID gpt-4

GPT-4 by OpenAI API pricing: $30.00 per 1M input tokens and $60.00 per 1M output tokens (provider list price via models.dev, Oct 10, 2026).

Prices

GPT-4 prices, USD per 1M tokens
Price	USD per 1M tokens
Input	$30.00
Output	$60.00
Cache read	Not published
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

$18,000

per month

per day: $600.00
per request: $0.06

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	$18,000/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day	$40,500/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input	$48,600/mo

Context and capabilities

Context: 8,192 tokens
Max output: 8,192 tokens
Input: text
Output: text
Knowledge cutoff: November 2023
Open weights: No
Tool calling: Yes
Reasoning: No
Structured outputs: No

Capabilities and limits as listed by models.dev.

Similarly priced models

GPT-6 Astra · $10.00 in / $50.00 out
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Kimi K3 · $3.00 in / $15.00 out
Gemini 3.1 Pro Preview · $2.00 in / $12.00 out

Price history

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

Questions

How much does GPT-4 cost per month?: For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-4 costs about $18,000 per month at OpenAI's list prices ($30.00 per 1M input tokens, $60.00 per 1M output tokens).
Does GPT-4 support prompt caching?: No cache read price is published for GPT-4.
How long is GPT-4's context window?: GPT-4 accepts up to 8,192 tokens (8.2K) of context and returns up to 8,192 tokens per response.