OpenAIReleased on Apr 16, 2025

o3: Benchmarks, Pricing & Context Window

o3 is a language model from OpenAI, released in April 2025, with multimodal input.

OpenAI's most powerful reasoning model. o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following.

Input
TextImage
Output
Text
Speed
Latency p9520.00s
Throughput P9550.0char/s
Cost
$2.67/ 1M · 8:1 in:out
$2.00 in · $8.00 out

o3 pricing

Providers

o3 starts at $2.00 per million input tokens and $8.00 per million output tokens via OpenAI.

ProviderInput $/MOutput $/MMax InputMax OutputLatency p95 sThroughput P95QuantInputOutput
OpenAI logoOpenAI
$2.00$8.00200.0K100.0K
20.00
50 c/s
—

o3 API

API access coming soon

o3 will be available through our gateway shortly.

o3 latency

7-day operational metrics from live API traffic.

o3 examples

Recent arena outputs from o3, picked from the highest-ranked matchups.

o3 license

o3 is released under the Proprietary license, which restricts commercial use, has a knowledge cutoff of May 2024.

License
Proprietary
Non-commercial
Knowledge cutoff
May 2024

Proprietary license - usage restrictions apply

o3 vs other models

The most-compared alternatives to o3 are Claude Sonnet 4.5, ERNIE 5.0, Gemini 2.5 Pro. Open any pair side-by-side for benchmarks, pricing, context, and latency.

Models like o3

Models ranked just above and below o3 by LLM Stats score.

 

Claude Sonnet 4.5

Score pending
DetailsCompare
 

ERNIE 5.0

Score pending
DetailsCompare
 

Gemini 2.5 Pro

Score pending
DetailsCompare
 

o4-mini

Score pending
DetailsCompare
 

MiMo-V2-Flash

Score pending
DetailsCompare
 

GLM-4.5

Score pending
DetailsCompare

FAQ

Common questions about o3.

When was o3 released?

o3 was released on April 16, 2025 by OpenAI. This is the official o3 release date tracked on LLM Stats.

Is o3 available via API?

Yes, o3 is available via API. See the official documentation for authentication and endpoint details. It is served by 1 provider tracked on LLM Stats.

Who created o3?

o3 was created by OpenAI.

What is the license for o3?

o3 is released under the Proprietary license.

What is the knowledge cutoff date for o3?

o3 has a knowledge cutoff of May 2024, meaning it was trained on data up to that point and may not know about events after it.

Is o3 multimodal?

Yes, o3 is multimodal and can accept both text and images as input.

Where can I use o3?

o3 is available through 1 provider including OpenAI.

Where is the o3 paper or technical report?

o3 has a paper or technical report available at https://cdn.openai.com/pdf/2221c875-02dc-4789-800b-e7758f3722c1/o3-and-o4-mini-system-card.pdf. Use that source for architecture, training, release and evaluation details.

What models should I compare o3 against?

Common o3 comparisons include o3 vs Claude Sonnet 4.5, o3 vs ERNIE 5.0, o3 vs Gemini 2.5 Pro. Compare them side by side for benchmark scores, pricing, context window, latency and API availability.