Model capability probe

Mistral: Mistral Small 4 | JSON mode

Whether Mistral: Mistral Small 4 supports JSON mode cannot be decided from the name alone. Check model ID mistralai/mistral-small-2603, provider Mistral AI, catalog params, modality, a lightweight runtime probe, and the error body together.

Model

mistralai/mistral-small-2603

Mistral: Mistral Small 4

Provider

Mistral AI

25 models in catalog

Capability

JSON mode

json-mode

Catalog signal

catalog shows support

Context: 262,144

Capability probe summary

Model

mistralai/mistral-small-2603

Capability

json-mode

Catalog signal

catalog shows support

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

How to judge this capability

Whether Mistral: Mistral Small 4 supports JSON mode cannot be decided from the name alone. Check model ID mistralai/mistral-small-2603, provider Mistral AI, catalog params, modality, a lightweight runtime probe, and the error body together.

Model: mistralai/mistral-small-2603
Provider: Mistral AI
Capability: JSON mode

How to prove it during checking

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

Start with the catalog signal: catalog shows support, then verify with a real key in read-only mode.
The capability probe must bind model ID mistralai/mistral-small-2603; do not test another model from the same provider.
JSON mode · supports frequency_penalty · supports include_reasoning · supports max_tokens · supports presence_penalty

Next action

Mistral: Mistral Small 4 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: catalog shows support
Context: 262,144

Open key checker

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

Open models

Mistral: Mistral Small 4

Open providers

Mistral AI