OpenAI: o3 Mini

OpenAI: o3 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 tierfile input

Input / 1M tokens: $1.10
Output / 1M tokens: $4.40
Cached input / 1M: $0.550
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 o3 Mini. Same weights, same API - the price difference is pure margin and routing.

Providers serving OpenAI: o3 Mini, cheapest first
Provider	Input / 1M	Output / 1M	Context	Throughput	Uptime 24h
OpenAICheapest	$1.10	$4.40	200K	-	100.0%

About o3 Mini

OpenAI o3-mini is a cost-efficient language model optimized for STEM reasoning tasks, particularly excelling in science, mathematics, and coding. This model supports the `reasoning_effort` parameter, which can be set to...

Specifications

OpenAI: o3 Mini specifications
Model ID	`openai/o3-mini`
Provider	OpenAI
Context window	200K tokens
Max output	100K tokens
Input modalities	text, file
Output modalities	text
Knowledge cutoff	2023-10-31
Open weights	No
Released	January 31, 2025

Cheaper alternatives

Models that cost less than o3 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: o3 Mini cost?

$1.10 per million input tokens and $4.40 per million output tokens. Cached input reads cost $0.550 per million tokens.

What is the context window of OpenAI: o3 Mini?

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

Does OpenAI: o3 Mini have extra fees beyond per-token pricing?

Yes. OpenAI: o3 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.