When was o3-mini released?

o3-mini was released by OpenAI on Friday, Jan 31 2025.

o3-mini was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

How much does o3-mini cost?

o3-mini costs $1.10 per million input tokens and $4.40 per million output tokens through the OpenAI API. Cached input is $0.55 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.

What benchmark scores did o3-mini get?

o3-mini reports 1 tracked benchmark score — SWE-Bench Verified: 49.3%. Scores are the figures published at release by OpenAI.

Is o3-mini open source?

No. o3-mini is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

What came before and after o3-mini?

OpenAI's previous tracked release was o1 on Dec 5 2024, 57 days earlier. It was followed by o3-mini-high on Jan 31 2025.

o3-mini

Released Jan 31 2025

o3-mini is an AI model released by OpenAI on Friday, Jan 31 2025, 57 days after o1. Benchmark results (shown below) cover SWE-Bench Verified.

API pricing

Input: $1.10
Cached input: $0.55
Output: $4.40

Reasoning or thinking is supported.

USD per 1M tokens

Benchmarks

SWE-Bench Verified

49.3%

via BenchLM

#52 of 57

Source: BenchLM, retrieved 31 August 2026. Every other score here is the figure the lab published at launch.

Compare o3-mini with

o3-mini

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Frequently asked questions

: o3-mini was released by OpenAI on Friday, Jan 31 2025.
: o3-mini was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.
: o3-mini costs $1.10 per million input tokens and $4.40 per million output tokens through the OpenAI API. Cached input is $0.55 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.
: o3-mini reports 1 tracked benchmark score — SWE-Bench Verified: 49.3%. Scores are the figures published at release by OpenAI.
: No. o3-mini is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
: OpenAI's previous tracked release was o1 on Dec 5 2024, 57 days earlier. It was followed by o3-mini-high on Jan 31 2025.