Model limit probe

OpenAI: gpt-oss-20b (free) | context window limit

OpenAI: gpt-oss-20b (free) context window limit decides whether a key can enter a production route. TestKey reads model ID openai/gpt-oss-20b:free, provider OpenAI, catalog context, real-key headers, 429 errors, and region signals together.

Model

openai/gpt-oss-20b:free

OpenAI: gpt-oss-20b (free)

Provider

OpenAI

62 models in catalog

Limit dimension

context window limit

context-window

Visible signal

catalog visible

Context window: 131,072

Limit matrix summary

Model

openai/gpt-oss-20b:free

Limit dimension

context-window

Visible signal

catalog visible

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

Why this limit matters

OpenAI: gpt-oss-20b (free) context window limit decides whether a key can enter a production route. TestKey reads model ID openai/gpt-oss-20b:free, provider OpenAI, catalog context, real-key headers, 429 errors, and region signals together.

Model: openai/gpt-oss-20b:free
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-oss-20b:free; limits from another model at the same provider cannot be reused.
context window limit · catalog visible · 131,072

Operator action

OpenAI: gpt-oss-20b (free) 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: 131,072

Open key checker

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

Open models

OpenAI: gpt-oss-20b (free)

Open providers

OpenAI