OpenAI · API-only (closed weights)

o3-pro

o3-pro is an API-only (closed weights) language model from OpenAI, released June 10, 2025. The context window is 195K tokens. On the Epoch Capabilities Index it scores 147.5, rank 81 of 256 rated models. API price: $20 input / $80 output per million tokens.

Check it against your own PC →

Lab

OpenAI

Released

June 10, 2025

Weights

API-only (closed weights)

Parameters

–

Context

195K

Price / M tokens

$20 / $80 in / out

Epoch ECI

147.5 #81

Benchmark results

Benchmark (Epoch AI)	Score
Aider Polyglot	84.9%

Links

Epoch AI benchmarks

Models with a similar score

GPT-5 Pro · Kimi K2.7 Code · GPT-5.1 · Beam 1.0 · Inkling-Small · GLM-5.1 · DeepSeek-V4-Pro · GPT-5

More from OpenAI

GPT-6.1 Terra · GPT-6.1 Sol · GPT-6 Sol · GPT-6 Luna · GPT-6 Astra · GPT-5.6 Cyber · Daybreak Red · Daybreak Blue