OpenAI: o3

OpenAI

OpenAI: o3 by OpenAI costs $2.00 per 1M input tokens and $8.00 per 1M output tokens, with a 200K-token context window.

Pricing

Input (per 1M tokens)

$2.00

Output (per 1M tokens)

$8.00

Cached input (per 1M)

$0.50

Provider	Input / 1M	Output / 1M
openrouter	$2.00	$8.00
OpenAI	$2.00	$8.00

Specifications

Provider: OpenAI
Context window: 200K tokens
Parameters: —
Released: Apr 2025
Open weights: No
Frontier model: No

Benchmarks

Epoch Capabilities Index: 146.9
FrontierMath: 18.7
GPQA Diamond: 81.8
LMArena (Chatbot Arena) Elo: 1409.8
LMArena Vision Elo: 1214.4
SWE-bench Multimodal: 36.0
SWE-bench Verified: 58.4

Speed & latency

Time to first token

0.97s

Output speed

142 tok/s

Fastest host: openai (via vercel-ai-gateway).

Compare OpenAI: o3 with…

OpenAI: o3 vs OpenAI: GPT-5.6 Sol Pro$10.00/1M OpenAI: o3 vs OpenAI: GPT-6.1 Sol Pro$10.00/1M OpenAI: o3 vs OpenAI: GPT-6.1 Sol Pro (batch)$5.00/1M OpenAI: o3 vs OpenAI: GPT-6.1 Sol$10.00/1M OpenAI: o3 vs OpenAI: GPT-6.1 Sol (batch)$5.00/1M OpenAI: o3 vs OpenAI: GPT-6 Luna Pro$0.50/1M

FAQ

How much does OpenAI: o3 cost?

OpenAI: o3 is priced at $2.00 per 1M input tokens and $8.00 per 1M output tokens. Output tokens cost more than input.

What is OpenAI: o3's context window?

OpenAI: o3 supports a context window of 200K tokens — the maximum prompt plus response length it can handle in a single request.

Is OpenAI: o3 open weight?

No — OpenAI: o3 is a closed/proprietary model accessed via API.

Data as of 2026-10-14. Source: Pricing via OpenRouter API, openrouter.ai. Pricing is per 1M tokens (USD); confirm with the provider before production use.