Model capability probe

Qwen: Qwen3.5 Plus 2026-02-15 | JSON mode

Whether Qwen: Qwen3.5 Plus 2026-02-15 supports JSON mode cannot be decided from the name alone. Check model ID qwen/qwen3.5-plus-02-15, provider Alibaba Cloud · Qwen, catalog params, modality, a lightweight runtime probe, and the error body together.

Model

qwen/qwen3.5-plus-02-15

Qwen: Qwen3.5 Plus 2026-02-15

Provider

Alibaba Cloud · Qwen

49 models in catalog

Capability

JSON mode

json-mode

Catalog signal

catalog shows support

Context: 1,000,000

Capability probe summary

Model

qwen/qwen3.5-plus-02-15

Capability

json-mode

Catalog signal

catalog shows support

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

How to judge this capability

Whether Qwen: Qwen3.5 Plus 2026-02-15 supports JSON mode cannot be decided from the name alone. Check model ID qwen/qwen3.5-plus-02-15, provider Alibaba Cloud · Qwen, catalog params, modality, a lightweight runtime probe, and the error body together.

Model: qwen/qwen3.5-plus-02-15
Provider: Alibaba Cloud · Qwen
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 qwen/qwen3.5-plus-02-15; do not test another model from the same provider.
JSON mode · supports include_reasoning · supports max_tokens · supports presence_penalty · supports reasoning

Next action

Qwen: Qwen3.5 Plus 2026-02-15 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: 1,000,000

Open key checker

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

Open models

Qwen: Qwen3.5 Plus 2026-02-15

Open providers

Alibaba Cloud · Qwen