How much does GPT-4 Turbo cost per month?

For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-4 Turbo costs about $7,500 per month at OpenAI's list prices ($10.00 per 1M input tokens, $30.00 per 1M output tokens).

Does GPT-4 Turbo support prompt caching?

No cache read price is published for GPT-4 Turbo.

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

GPT-4 Turbo accepts up to 128,000 tokens (128K) of context and returns up to 4,096 tokens per response.

GPT-4 Turbo 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 · 128K context · API model ID gpt-4-turbo

GPT-4 Turbo by OpenAI API pricing: $10.00 per 1M input tokens and $30.00 per 1M output tokens (provider list price via models.dev, Oct 10, 2026).

Prices

GPT-4 Turbo prices, USD per 1M tokens
Price	USD per 1M tokens
Input	$10.00
Output	$30.00
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

$7,500

per month

per day: $250.00
per request: $0.025

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	$7,500/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day	$14,250/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input	$16,800/mo

Context and capabilities

Context: 128,000 tokens
Max output: 4,096 tokens
Input: text, image
Output: text
Knowledge cutoff: December 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
Claude Opus 5.5 · $4.00 in / $20.00 out
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 Turbo cost per month?: For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-4 Turbo costs about $7,500 per month at OpenAI's list prices ($10.00 per 1M input tokens, $30.00 per 1M output tokens).
Does GPT-4 Turbo support prompt caching?: No cache read price is published for GPT-4 Turbo.
How long is GPT-4 Turbo's context window?: GPT-4 Turbo accepts up to 128,000 tokens (128K) of context and returns up to 4,096 tokens per response.