Model limit probe

OpenAI: o3 Pro | max output limit

OpenAI: o3 Pro max output limit decides whether a key can enter a production route. TestKey reads model ID openai/o3-pro, provider OpenAI, catalog context, real-key headers, 429 errors, and region signals together.

Model

openai/o3-pro

OpenAI: o3 Pro

Provider

OpenAI

62 models in catalog

Limit dimension

max output limit

max-output

Visible signal

catalog visible

Context window: 200,000

Limit matrix summary

Model

openai/o3-pro

Limit dimension

max-output

Visible signal

catalog visible

Read-only check. Detection data burns after 5 minutes.

Why this limit matters

OpenAI: o3 Pro max output limit decides whether a key can enter a production route. TestKey reads model ID openai/o3-pro, provider OpenAI, catalog context, real-key headers, 429 errors, and region signals together.

Model: openai/o3-pro
Provider: OpenAI
Limit dimension: max output limit

How to prove it

Read-only check. Detection data burns after 5 minutes.

Start with the visible signal: catalog visible, then read headers and error bodies with read-only requests.
max output limit must bind model ID openai/o3-pro; limits from another model at the same provider cannot be reused.
max output limit · catalog visible · 200,000

Operator action

OpenAI: o3 Pro max output limit is not just a number. It should become route throttling, sale tags, headroom alerts, fallback model suggestions, and price protection.

Read-only check. Detection data burns after 5 minutes.
Visible signal: catalog visible
Context window: 200,000

Open key checker

Read-only check. Detection data burns after 5 minutes.