Qwen3: Qwen3.5-4b
qwen/qwen3.5-4b
Qwen3.5 4B is a low-cost multimodal reasoning model with 256K context, image and video input, function tools, and structured output. Supports text, image, and video input, streaming, function tools, structured JSON output, seed control, and thinking mode on by default. Use reasoning_effort or thinking_budget for bounded thinking, or enable_thinking=false for direct answers. Automatic cache reads are billed at the cached-input rate when reported by the model service. Explicit cache controls are not supported.
Model specifications
- Input
- text, image, video
- Output
- text
- Context
- 256,000 tokens
- Max output
- 32,768 tokens
- Input price
- $0.04 / 1M tokens
- Output price
- $0.07 / 1M tokens
- Released
- 2026-09-03
Capabilities
- Streaming
- Function calling
- Vision
- JSON mode
Provider pricing, discounts and data privacy
Compare effective provider prices, published discounts, regions, retention policies, training use, compliance, and privacy links by service tier.
Standard service tier
1 available provider · tier input average $0.04 / 1M tokens · tier output average $0.07 / 1M tokens
Empiriolabs
Tier: Standard · Region: US
Pricing
- Input
- $0.04 / 1M tokens
- Output
- $0.07 / 1M tokens
- Cache read
- $0.02 / 1M tokens
No provider discount is currently published.
Data privacy and compliance
- Region
- US
- Zero data retention
- No
- Used for training
- No
- Data collection
- Moderated
- No
- GDPR compliant
- No
- HIPAA compliant
- No
- SOC 2 certified
- No
- BYOK supported
- No
Frequently asked questions
- What is Qwen3: Qwen3.5-4b?
- Qwen3.5 4B is a low-cost multimodal reasoning model with 256K context, image and video input, function tools, and structured output. Supports text, image, and video input, streaming, function tools, structured JSON output, seed control, and thinking mode on by default. Use reasoning_effort or thinking_budget for bounded thinking, or enable_thinking=false for direct answers. Automatic cache reads are billed at the cached-input rate when reported by the model service. Explicit cache controls are not supported.
- How much does Qwen3: Qwen3.5-4b cost?
- Input costs start at $0.04 / 1M tokens and output costs start at $0.07 / 1M tokens. Provider-level prices vary by service tier.
- What is the context length of Qwen3: Qwen3.5-4b?
- Qwen3: Qwen3.5-4b supports a 256,000 token context window and up to 32,768 output tokens.
- What capabilities does Qwen3: Qwen3.5-4b support?
- Qwen3: Qwen3.5-4b supports Streaming, Function calling, Vision, JSON mode.
- Which providers offer Qwen3: Qwen3.5-4b?
- Qwen3: Qwen3.5-4b is available from Empiriolabs.
- How do providers handle data privacy for Qwen3: Qwen3.5-4b?
- 1 of 1 providers report that customer data is not used for training, and 0 offer zero-data-retention routing. Retention, compliance, and privacy-policy links are listed per provider.