Model limit probe

Anthropic: Claude Opus 4.6 (Fast) | reset window

Anthropic: Claude Opus 4.6 (Fast) reset window decides whether a key can enter a production route. TestKey reads model ID anthropic/claude-opus-4.6-fast, provider Anthropic, catalog context, real-key headers, 429 errors, and region signals together.

Model

anthropic/claude-opus-4.6-fast

Anthropic: Claude Opus 4.6 (Fast)

Provider

Anthropic

13 models in catalog

Limit dimension

reset window

reset-window

Visible signal

real key probe required

Context window: 1,000,000

Limit matrix summary

Model

anthropic/claude-opus-4.6-fast

Limit dimension

reset-window

Visible signal

real key probe required

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

Why this limit matters

Anthropic: Claude Opus 4.6 (Fast) reset window decides whether a key can enter a production route. TestKey reads model ID anthropic/claude-opus-4.6-fast, provider Anthropic, catalog context, real-key headers, 429 errors, and region signals together.

Model: anthropic/claude-opus-4.6-fast
Provider: Anthropic
Limit dimension: reset window

How to prove it

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

Start with the visible signal: real key probe required, then read headers and error bodies with read-only requests.
reset window must bind model ID anthropic/claude-opus-4.6-fast; limits from another model at the same provider cannot be reused.
reset window · real key probe required · 1,000,000

Operator action

Anthropic: Claude Opus 4.6 (Fast) reset window 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: real key probe required
Context window: 1,000,000

Open key checker

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

Open models

Anthropic: Claude Opus 4.6 (Fast)

Open providers

Anthropic