OpenAI › o3 Mini › Pricing

o3 Mini pricing

API list price by OpenAI · checked Oct 26, 2026
Benchmarks and alternatives →
$1.10 / $4.40per 1M tokens in / out
$0.55cache read · −50%
#295on OpenRouter by tokens · 1.7B / week

Price sheetper 1M tokens

Input$1.10list
Output$4.40
Cache read$0.55−50% vs input
Context · max output200K · 100Ktokens

Where to buy1 provider · per 1M tokens

ProviderInputOutputContext
OpenAIlab$1.10$4.40—

In OpenAI's line-upper 1M in / out

GPT-6 Luna Decisions$0.10 / —−100%
GPT OSS 20B$0.018 / $0.09−98%
GPT OSS 120B$0.03 / $0.15−97%
GPT OSS Safeguard 20B$0.07 / $0.20−95%
GPT-6 Luna$0.10 / $0.50−90%
GPT OSS Safeguard 120B$0.15 / $0.60−86%
GPT-5.4 Mini (2026-03-17)$0.75 / $4.50−12%
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Cheaper for the same workvs o3 Mini

MiMo v2.6 Pro thinkingOpen-72%score ×3.7$0.13
DeepSeek V4.1 Flash 1017 maxOpen-73%score ×3.6$0.26
Ling 3.1 Flash 1019-77%score ×3.5$1.49
Step 5 Preview thinkingOpen-26%score ×3.5$1.03
Claude Haiku 5.5 max-90%score ×3.5$0.21

Pricing questions

How much does o3 Mini cost?›

$1.10 per 1M input tokens and $4.40 per 1M output tokens. Cached input is $0.55.

Is o3 Mini free to use?›

There is no free API tier.

How much does prompt caching save?›

Cache reads cost $0.55 per 1M, 50% below the input price.

What is a cheaper alternative to o3 Mini?›

MiMo v2.6 Pro at thinking effort costs -72% per task with a score ×3.7 on .