Qwen3.5 4B (Reasoning) API Provider Benchmarking & Analysis
This analysis is intended to support you in choosing the best API provider of Qwen3.5 4B (Reasoning) for your use-case.
Lowest Time per Task
Time per Intelligence Index task (minutes)
Total 1 provider
Lowest Cost per Task
Cost per Intelligence Index task
Total 1 provider
Qwen3.5 4B is available through DeepInfra (FP8).
Pricing
Cost per Intelligence Index Task: Qwen3.5 4B (Reasoning)
Pricing: Cache Hit, Input, and Output: Qwen3.5 4B (Reasoning)
Output Speed vs. Cost per Task: Qwen3.5 4B (Reasoning)
Speed
Average of the single-request and multi-turn agentic workloads measured
Output Speed: Qwen3.5 4B (Reasoning)
Latency
Average of the single-request and multi-turn agentic workloads measured
Time to First Answer Token: Qwen3.5 4B (Reasoning)
Reliability
Share of requests the endpoint failed, across all the single-request and multi-turn agentic workloads measured
Endpoint Error Rate: Qwen3.5 4B (Reasoning)
Key Comparison Metrics & API Features
Frequently Asked Questions
Common questions about Qwen3.5 4B (Reasoning) providers
Qwen3.5 4B (Reasoning) is available through 1 API provider: DeepInfra (FP8). Each provider offers different performance characteristics and pricing.
Qwen3.5 4B (Reasoning) is currently available through 1 API provider that we benchmark and track.
The provider with the lowest time to first answer token for Qwen3.5 4B (Reasoning) is DeepInfra (FP8) (94.51s). Lower latency means faster initial response time.
The most affordable provider for Qwen3.5 4B (Reasoning) by blended price is DeepInfra (FP8) ($0.04 per 1M tokens). Blended price uses a 7:2:1 cache hit/input/output token ratio.
The provider with the lowest input token pricing for Qwen3.5 4B (Reasoning) is DeepInfra (FP8) ($0.03 per 1M input tokens).
The provider with the lowest output token pricing for Qwen3.5 4B (Reasoning) is DeepInfra (FP8) ($0.15 per 1M output tokens).
The only provider of Qwen3.5 4B (Reasoning) supports JSON mode for structured output.
The only provider of Qwen3.5 4B (Reasoning) supports function calling (tool use).
When choosing a provider for Qwen3.5 4B (Reasoning), consider: time per task (how quickly the provider completes an Intelligence Index task), latency (for interactive applications requiring quick first responses), pricing (for cost-sensitive workloads), and API features like JSON mode or function calling.
Yes, provider performance can vary over time due to infrastructure changes, load balancing, and updates. We continuously benchmark all providers and display historical performance trends in the "Over Time" charts.
For information about Qwen3.5 4B (Reasoning)'s intelligence, capabilities, modalities, and how it compares to other models, see the model overview page. View model overview