A rate per million tokens is not a budget. The calculator takes your request volume, prompt size and cache hit rate and gives you a monthly figure.

GPT-4o mini API pricing (October 2026)

Prices verified 30 Oct 2026

OpenAI retires GPT-4o mini on 14 Jan 2027; the named replacement is GPT-6 Luna.

Input

$0.150

per 1M tokens

Output

$0.600

per 1M tokens

Cached input

$0.075

per 1M tokens

Batch discount

50% off

async batch endpoint

What it costs at real volumes

A chat-shaped workload: 800 input tokens and 300 output tokens per request, no caching, no batch.

Volume	Per request	Per month	Per year
10K requests/day	$0.00030	$91	$1,096	Adjust →
100K requests/day	$0.00030	$913	$10,958	Adjust →
1M requests/day	$0.00030	$9,132	$109,584	Adjust →

Specifications

Provider: OpenAI
Context window: 128K tokens
Max output: 16K tokens
Tier: Small
Status: Retires on 14 Jan 2027, replacement GPT-6 Luna
Blended $/1M (3:1): $0.262
Cache break-even, caching each turn: 0%, caching always saves
Prices verified: 30 Oct 2026

Source: OpenAI pricing. Finitizer is not affiliated with OpenAI.

Similar models

Other GPT models

GPT-6 Astra+$19.74
GPT-6.1 Sol+$3.74
GPT-6.1 Terra+$1.74
GPT-6 Luna-$0.062
GPT-5.6 Sol+$7.74
GPT-5.6 Terra+$4.24
GPT-5.6 Luna+$0.188
GPT-5+$3.18
GPT-5 mini+$0.425
GPT-5 nano-$0.125
GPT-4.1+$3.24
GPT-4.1 mini+$0.438
GPT-4.1 nano-$0.087
GPT-4o+$4.11
o3+$3.24
o4-mini+$1.66

Closest prices elsewhere

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Frequently asked questions

How much does GPT-4o mini cost per 1M tokens?

GPT-4o mini costs $0.150 per million input tokens and $0.600 per million output tokens at OpenAI list prices. Output is 4.0x the input rate, so the input:output ratio of a workload drives the real cost more than the headline price.

Does GPT-4o mini support prompt caching?

Yes. Cached input is billed at $0.075 per million tokens, 2x cheaper than uncached input. There is no cache-write premium, so caching is never a net loss.

What is the batch discount for GPT-4o mini?

Requests submitted through the asynchronous batch endpoint are billed at 50% off both input and output rates, bringing input to $0.075 and output to $0.300 per million tokens.

What is GPT-4o mini's context window?

128K tokens of context with up to 16K output tokens per request. A larger context window raises the ceiling on what you can send, not the price per token, but filling it on every request is one of the most common causes of an unexpected bill.

Running GPT-4o mini in production?

Finitizer Tokenomics reads what this model actually costs you from your own bills and exports, shows which workload, team or API key is spending it, flags a spike or a new spend source the day your data shows it, and forecasts where the month will land.

See Finitizer Tokenomics