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  1. Home
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  3. Compare

o3 vs o3 Pro

Compare o3 from OpenAI and o3 Pro from OpenAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Favicon for openai
o3
Favicon for openai
o3 Pro
Favicon for openai
o3
Favicon for openai
o3 Pro

Overview

o3
Author
OpenAI
o3 Pro
Author
OpenAI
o3
Context length
200Ktokens
o3 Pro
Context length
200Ktokens
o3
Reasoning
o3 Pro
Reasoning
o3
Input modalities
o3 Pro
Input modalities
o3
Output modalities
o3 Pro
Output modalities

o3 vs o3 Pro: side-by-side summary

o3 and o3 Pro are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

o3, from OpenAI, has a 200,000-token context window and is priced at $2/M tokens input, $8/M tokens output on OpenRouter.

o3 Pro, from OpenAI, has a 200,000-token context window and is priced at $20/M tokens input, $80/M tokens output on OpenRouter.

Context window
  • o3: 200,000 tokens
  • o3 Pro: 200,000 tokens
Price
  • o3: $2/M tokens input, $8/M tokens output
  • o3 Pro: $20/M tokens input, $80/M tokens output
Provided by
  • o3: OpenAI
  • o3 Pro: OpenAI
  • o3 model details, providers and pricing
  • o3 Pro model details, providers and pricing

o3 vs o3 Pro at a glance

o3 vs o3 Pro comparison
Attributeo3o3 Pro
Input price$2/M tokens$20/M tokens
Output price$8/M tokens$80/M tokens
Context window200,000 tokens200,000 tokens
Intelligence Index20.221.9
Coding IndexNot availableNot available
Agentic IndexNot availableNot available
Latency (p50)1.89 s3.15 s
Throughput (p50)54.0 tok/s15.0 tok/s

Benchmark data updated Oct 5, 2026

Frequently asked questions

Is o3 cheaper than o3 Pro?

o3 is cheaper than o3 Pro on OpenRouter: o3 costs $2/M tokens input and $8/M tokens output, while o3 Pro costs $20/M tokens input and $80/M tokens output.

Which has the longer context window, o3 or o3 Pro?

o3 and o3 Pro have the same context window of 200,000 tokens.

Which is faster, o3 or o3 Pro?

o3 is faster on OpenRouter, generating a median 54.0 tokens per second compared with 15.0 tokens per second for o3 Pro.