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Model limit probe

OpenAI: GPT-4 Turbo | context window limit

OpenAI: GPT-4 Turbo context window limit decides whether a key can enter a production route. TestKey reads model ID openai/gpt-4-turbo, provider OpenAI, catalog context, real-key headers, 429 errors, and region signals together.

Model
openai/gpt-4-turbo
OpenAI: GPT-4 Turbo
Provider
OpenAI
62 models in catalog
Limit dimension
context window limit
context-window
Visible signal
catalog visible
Context window: 128,000
Limit matrix summary
Model
openai/gpt-4-turbo
Limit dimension
context-window
Visible signal
catalog visible
Read-only check. Detection data burns after 5 minutes.
Read-only check. Detection data burns after 5 minutes.

Why this limit matters

OpenAI: GPT-4 Turbo context window limit decides whether a key can enter a production route. TestKey reads model ID openai/gpt-4-turbo, provider OpenAI, catalog context, real-key headers, 429 errors, and region signals together.

  • Model: openai/gpt-4-turbo
  • Provider: OpenAI
  • Limit dimension: context window 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.
  • context window limit must bind model ID openai/gpt-4-turbo; limits from another model at the same provider cannot be reused.
  • context window limit · catalog visible · 128,000

Operator action

OpenAI: GPT-4 Turbo context window 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: 128,000