o1-preview

OpenAI

o1-preview by OpenAI costs — per 1M input tokens and — per 1M output tokens, with a —-token context window.

Pricing

Input (per 1M tokens)

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Output (per 1M tokens)

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Cached input (per 1M)

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Specifications

Provider: OpenAI
Context window: —
Parameters: —
Released: Sep 2024
Open weights: No
Frontier model: No

Benchmarks

Epoch Capabilities Index: 134.8
GPQA Diamond: 50.3
LMArena (Chatbot Arena) Elo: 1352.7
SWE-bench Verified: 64.6

Compare o1-preview with…

o1-preview vs OpenAI: GPT-5.6 Sol Pro$10.00/1M o1-preview vs OpenAI: GPT-5 Image Mini$2.00/1M o1-preview vs OpenAI: gpt-oss-120b (free)$0.00/1M o1-preview vs OpenAI: gpt-oss-20b (free)$0.00/1M o1-preview vs OpenAI: GPT-5.1-Codex-Mini$2.00/1M o1-preview vs GPT-5 Chat (latest)$10.00/1M

FAQ

How much does o1-preview cost?

o1-preview is priced at — per 1M input tokens and — per 1M output tokens. Output tokens cost more than input.

What is o1-preview's context window?

o1-preview supports a context window of — tokens — the maximum prompt plus response length it can handle in a single request.

Is o1-preview open weight?

No — o1-preview is a closed/proprietary model accessed via API.

Data as of 2026-10-14. Source: Epoch AI, Data on AI Models (CC BY 4.0), epoch.ai. Pricing is per 1M tokens (USD); confirm with the provider before production use.