How much does o3 cost?

o3 costs $2.00/M input tokens and $8.00/M output tokens, with separate rates for Cache Read at $0.50/M tokens and Web Search at $10.00/1K calls.

What is the context length of o3?

o3 has a 200,000 token context window. It supports up to 100,000 completion tokens.

Does o3 support tool calling and structured outputs?

Yes. o3 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

What inputs and outputs does o3 support?

o3 accepts images, text, and files such as PDFs as input and returns text.

Which providers serve o3?

o3 is served by 1 provider on OpenRouter: OpenAI.

What other text models does OpenAI have?

GPT-6.1 Terra Pro, GPT-6.1 Terra, GPT-6 Luna Decisions and 58 more are other text models from OpenAI.

When was o3 released?

o3 was released on April 16, 2025. Its knowledge cutoff is June 30, 2024.

OpenAI: o3

Going away December 11, 2026

openai/o3

Compare

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. Use it to think through multi-step problems that involve analysis across text, code, and images.

Modalities

In / out price

$2 / $8per 1M

Context

200K

Released

Apr 16, 2025

Knowledge cutoff

Jun 2024

Providers

This model is hosted by one provider. OpenRouter forwards every request without routing.

Latency / throughput


	$2.00	$8.00	$0.50	2.13s	46 tok/s	100.00%

Input $2.00Output $8.00
46 tok/s100.00% uptime

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Weighted average

Input

$1.625/M tokens

Output

$8/M tokens

o3 — Price history

Price history

No effective price data for this selection

		$1.62	$8.00	25.0%	100.0%

Effective in $1.62Effective out $8.00
Token share
100.0%

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Uptime (3d)

100.00%

Availability (3d)

99.84%

Availability over the last 3 days

Last 72 hours

Availability 99.84%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

99.62%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for OpenAI: o3 (Artificial Analysis, Design Arena and Vals AI)
Source	Benchmark	Score
Artificial Analysis	o3 GPQA Diamond	82.7%
Artificial Analysis	o3 HLE	20.1%
Artificial Analysis	o3 IFBench	71.4%
Artificial Analysis	o3 τ²-Bench Telecom	80.7%
Artificial Analysis	o3 AA-LCR	74.7%
Artificial Analysis	o3 CritPt	1.1%
Artificial Analysis	o3 LiveCodeBench	80.8%
Artificial Analysis	o3 Terminal-Bench Hard	37.1%
Artificial Analysis	o3 MMLU-Pro	85.3%
Artificial Analysis	o3 AIME 2025	88.3%
Artificial Analysis	o3 AIME	90.3%
Artificial Analysis	o3 MATH-500	99.2%
Design Arena	o3 Models Arena Code Categories Elo	1009
Design Arena	o3 Models Arena Data Visualization Elo	1200
Design Arena	o3 Models Arena Game Development Elo	1024
Design Arena	o3 Models Arena UI Component Elo	1007
Design Arena	o3 Models Arena Website Elo	1028
Vals AI	o3 AIME	85.3%
Vals AI	o3 CorpFin v2	59.7%
Vals AI	o3 Finance Agent v1	47.7%
Vals AI	o3 GPQA Diamond	84.1%
Vals AI	o3 LiveCodeBench	83.9%
Vals AI	o3 LegalBench	83.8%
Vals AI	o3 MATH 500	94.6%
Vals AI	o3 MedCode	47.3%
Vals AI	o3 MedQA	96.1%
Vals AI	o3 MedScribe	76.7%
Vals AI	o3 MGSM	91.7%
Vals AI	o3 MMLU Pro	85.6%
Vals AI	o3 MMMU Pro	80.4%
Vals AI	o3 MortgageTax	65.7%
Vals AI	o3 SAGE v1	41.8%
Vals AI	o3 TaxEval v2	74.6%

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

lvmm-core

new

37.9Mtokens

xiid-router

new

37.6Mtokens

Open WebUI

Open WebUI is a self-hosted AI platform providing a chat interface for Large Language Models.

34.3Mtokens

OFS25 Daily Outlook

new

28.9Mtokens

Nous Research API

Nous Research is an AI research team focused on advancing open-source AI.

24.9Mtokens

Rest of OpenRouter

7.32M

Top 5 Apps

79K

Not currently available through EU in-region routing. In-region routing docs

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GPT-6.1 Terra Pro

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GPT-6.1 Terra Pro (batch)

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GPT-6 Luna Decisions

GPT-6 Luna Decisions is GPT-6 Luna served through OpenAI's Decisions API. Instead of generating text, it reads the content passed as state (text, JSON, or images) and returns typed, probabilistic answers to named questions in a single request: the probability of yes for a yes/no question (noul), a probability for every option plus the most likely one (choice), or a probability for every level of an ordered rubric plus the expected score (score).

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Text1.1M context$0.10 / $0.50

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GPT Astra Latest

This model always redirects to the latest model in the GPT Astra family.

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OpenAI: o3

Providers