Model capability probe

Anthropic: Claude 3 Haiku | JSON mode

Whether Anthropic: Claude 3 Haiku supports JSON mode cannot be decided from the name alone. Check model ID anthropic/claude-3-haiku, provider Anthropic, catalog params, modality, a lightweight runtime probe, and the error body together.

Model

anthropic/claude-3-haiku

Anthropic: Claude 3 Haiku

Provider

Anthropic

13 models in catalog

Capability

JSON mode

json-mode

Catalog signal

runtime probe required

Context: 200,000

Capability probe summary

Model

anthropic/claude-3-haiku

Capability

json-mode

Catalog signal

runtime probe required

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

How to judge this capability

Whether Anthropic: Claude 3 Haiku supports JSON mode cannot be decided from the name alone. Check model ID anthropic/claude-3-haiku, provider Anthropic, catalog params, modality, a lightweight runtime probe, and the error body together.

Model: anthropic/claude-3-haiku
Provider: Anthropic
Capability: JSON mode

How to prove it during checking

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

Start with the catalog signal: runtime probe required, then verify with a real key in read-only mode.
The capability probe must bind model ID anthropic/claude-3-haiku; do not test another model from the same provider.
JSON mode · supports max_tokens · supports stop · supports temperature · supports tool_choice

Next action

Anthropic: Claude 3 Haiku JSON mode should turn into an operator action: confirm sale tags, fill the capability matrix, change route, suggest a fallback model, or mark unsupported for now.

Read-only check. Detection data burns after 5 minutes.
Catalog signal: runtime probe required
Context: 200,000

Open key checker

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

Open models

Anthropic: Claude 3 Haiku

Open providers

Anthropic