How much does o3-pro cost?

o3-pro costs $20.00 per million input tokens and $80.00 per million output tokens, using the list price from OpenAI as of 26 Oct 2026. That is about $6 for 100 chats of about 1,000 tokens in and 500 tokens back. Confirm on the maker's site before you buy, because prices change.

What is the context window of o3-pro?

o3-pro has a context window of 200K tokens, roughly 150,000 words of text read at once. A single answer can be up to 100K tokens long.

Is o3-pro open source?

We list o3-pro as closed: it is used through its maker's apps or API and its weights are not published (Epoch AI lists its access as "API access").

How good is o3-pro compared with other AI models?

On the Epoch Capabilities Index, o3-pro scores 147.3 (likely range 145.6 to 150.1), which ranks 70 of 270 models we track. Scores close together are a tie in practice.

How does o3-pro compare with Qwen 3.6 Plus?

On quality, neither model leads clearly across the 1 measure both have. 1 measure is too close to call. Qwen 3.6 Plus costs about 97% less than o3-pro on a blended price of $1.13 against $35.00 per million tokens. See the full comparison for every measure.

How current are these numbers for o3-pro?

The newest data on this page is dated 26 Oct 2026. Scores come from Epoch AI and Arena, prices from the open LiteLLM price list.

AI Rankings

o3-pro: Score, Price and Context Window

Where o3-pro from OpenAI ranks, what it costs and how much text it can read, in plain numbers with the sources.

Data updated 26 Oct 2026

OpenAI
Closed weights
Released Jun 2025

Its score range overlaps with Kimi K2.5, the model just above it, so a small gap in rank is not a meaningful difference.

Skip if

Tight budgets: it is among the priciest quarter of models in the top half by score.

These lines are worked out from the numbers on this page, not from hands-on testing.

Key facts

Overall score: 147.3; Rank 70 of 270. Likely range 145.6 to 150.1.
Price per million tokens: $20.00 in / $80.00 out; Blended $35.00. List price from OpenAI, checked 26 Oct 2026.
Context window: 200K tokens; About 150,000 words at once. One answer up to 100K tokens.
Weights: Closed; Used through the maker's apps or API (Epoch AI: API access).

Features listed by the price list: Image input, PDF input, Tool use, Reasoning, Web search, Prompt caching, Structured output.

We do not have an Arena human-vote rating for o3-pro yet. It is shown as "Not measured" rather than guessed.

Try itChatGPT in our AI tools directoryOpenAI's AI assistant for writing, coding, research, file analysis, and connected work across chats and projects.

How o3-pro stacks up

Each strip shows every model we track as faint bars. The dot is this model. Better is always to the right, even for price.

o3-pro compared with all models we trackOverall capability: 147.3. Better than 74% of the other 269 models. Price: $35.00 per 1M. Cheaper than 3% of the other 200 priced models. Context window: 200K tokens. Larger context window than 39% of the other 198 models.

Overall capability147.3
Better than 74% of the other 269 modelsUpper half
Epoch Capabilities Index: one score that combines many tests.
Price$35.00 per 1M
Cheaper than 3% of the other 200 priced models
Blended price per million tokens. Lower is better, so the cheapest models sit on the right.
Context window200K tokens
Larger context window than 39% of the other 198 models
How much text it can read at once. Bigger suits long documents.

Compared with the other published models that have each measure. Data updated 26 Oct 2026.

Where o3-pro ranks

Leaderboards it appears on, best placing first.

See all leaderboards

Test results

Each test checks one kind of skill. Place shows where it stands among the models that took that test.

Aider Polyglot
225 coding exercises in six programming languages. The AI edits the code files and the exercise's tests decide pass or fail.
84.9%
Place 2 of 46
ARC-AGI-2
Visual puzzles where the AI must work out a new rule from a few examples and apply it. They test picking up a new idea quickly, not recalling facts.
4.9%
Place 59 of 86
tied with 3 others

What it costs in everyday terms

List prices turned into amounts you can picture. Real bills depend on how you use it.

100 chats: $6; Cost of 100 chats assumes each chat sends 1,000 tokens (about 750 words) and gets 500 tokens (about 375 words) back.
A 300-page book: $2; Cost to read a 300-page book assumes about 100,000 input tokens and no reply. A real book varies with page size and language.
Blended price: $35.00 per 1M; Three parts input to one part output. Our own calculation for comparing models.

Similar models

Models from other makers with a similar overall score.

Learn more

Questions about o3-pro

How much does o3-pro cost?: o3-pro costs $20.00 per million input tokens and $80.00 per million output tokens, using the list price from OpenAI as of 26 Oct 2026. That is about $6 for 100 chats of about 1,000 tokens in and 500 tokens back. Confirm on the maker's site before you buy, because prices change.
What is the context window of o3-pro?: o3-pro has a context window of 200K tokens, roughly 150,000 words of text read at once. A single answer can be up to 100K tokens long.
Is o3-pro open source?: We list o3-pro as closed: it is used through its maker's apps or API and its weights are not published (Epoch AI lists its access as "API access").
How good is o3-pro compared with other AI models?: On the Epoch Capabilities Index, o3-pro scores 147.3 (likely range 145.6 to 150.1), which ranks 70 of 270 models we track. Scores close together are a tie in practice.
How does o3-pro compare with Qwen 3.6 Plus?: On quality, neither model leads clearly across the 1 measure both have. 1 measure is too close to call. Qwen 3.6 Plus costs about 97% less than o3-pro on a blended price of $1.13 against $35.00 per million tokens. See the full comparison for every measure.
How current are these numbers for o3-pro?: The newest data on this page is dated 26 Oct 2026. Scores come from Epoch AI and Arena, prices from the open LiteLLM price list.

Where this data comes from

Epoch AI: Benchmark data: Epoch AI, 'Capabilities & benchmarking', epoch.ai/benchmarks (CC BY 4.0). We match models across sources, rank them and show them in charts. Scores are not changed. Epoch AI does not endorse this site.
LiteLLM model price list: Prices and context windows: LiteLLM model price list (github.com/BerriAI/litellm, MIT licence). We use the model maker's own price entry when there is one. Prices change often, so always confirm on the maker's site before you buy.

Newest data on this page: 26 Oct 2026. Prices are list prices and change often, so confirm on the maker's site before you buy. Sponsors never change a score or an order. How we calculate this · Report a mistake