OpenAI: o4 Mini

OpenAI: o4 Mini is a large language model from OpenAI. It costs $1.10 per million input tokens and $4.40 per million output tokens. Its context window is 200K tokens.

ReasoningTool callingStructured outputPrompt cachingBatch tierimage inputfile input

Input / 1M tokens: $1.10
Output / 1M tokens: $4.40
Cached input / 1M: $0.275
Context window: 200K

This model also charges $0.01 per search request

That is $10.00 per 1,000 requests, billed on top of the token prices above. On a typical 1,000-in / 500-out exchange the tokens cost $0.0033, so the search fee is 3.0× the token cost. Per-token rankings elsewhere ignore this entirely.

Who serves it cheapest

1 hosts serve o4 Mini. Same weights, same API - the price difference is pure margin and routing.

Providers serving OpenAI: o4 Mini, cheapest first
Provider	Input / 1M	Output / 1M	Context	Throughput	Uptime 24h
OpenAICheapest	$1.10	$4.40	200K	-	100.0%

About o4 Mini

OpenAI o4-mini is a compact reasoning model in the o-series, optimized for fast, cost-efficient performance while retaining strong multimodal and agentic capabilities. It supports tool use and demonstrates competitive reasoning...

Specifications

OpenAI: o4 Mini specifications
Model ID	`openai/o4-mini`
Provider	OpenAI
Context window	200K tokens
Max output	100K tokens
Input modalities	image, text, file
Output modalities	text
Knowledge cutoff	2024-06-30
Open weights	No
Released	April 16, 2025

Cheaper alternatives

Models that cost less than o4 Mini while keeping at least half its context window and every input modality it supports.

Sakana Namazu

$0.950 in · $4.00 out

1.1× cheaper

GPT-5.4 Mini

$0.750 in · $4.50 out

1.1× cheaper

Grok 4.3

$1.25 in · $2.50 out

1.2× cheaper

Grok 4.20 Multi-Agent

$1.25 in · $2.50 out

1.2× cheaper

Grok 4.20

$1.25 in · $2.50 out

1.2× cheaper

Frequently asked

How much does OpenAI: o4 Mini cost?

$1.10 per million input tokens and $4.40 per million output tokens. Cached input reads cost $0.275 per million tokens.

What is the context window of OpenAI: o4 Mini?

200K tokens, with up to 100K tokens of output per request.

Does OpenAI: o4 Mini have extra fees beyond per-token pricing?

Yes. OpenAI: o4 Mini charges $0.01 per search request - $10.00 per 1,000 requests - on top of $1.10 per million input tokens and $4.40 per million output tokens. On a typical 1,000-input / 500-output exchange the search fee alone is 3.0× the token cost.

Confirm against the source: OpenAI official pricing.