Qwen3.5 397B-A17B vs Qwen3.5 122B-A10B

Both Qwen3.5 397B-A17B and Qwen3.5 122B-A10B are open-weights foundation models available at $0.00 direct API cost when self-hosted, or offered at identical baseline rates across major inference providers. Model selection depends on GPU deployment sizing and specialized benchmark performance rather than raw token price.

Both Qwen3.5 397B-A17B and Qwen3.5 122B-A10B offer an identical context window of 262K tokens (~197k words). Both architectures provide equal capacity for large document ingestion, multi-file codebases, and extended multi-turn conversation histories.

Qwen3.5 397B-A17B scores 58% on SWE-bench Verified, while Qwen3.5 122B-A10B scores competitively for software generation. For complex autonomous debugging and agentic engineering, Qwen3.5 397B-A17B provides robust code generation and tool calling.

Qwen3.5 397B-A17B features native chain-of-thought extended thinking mode with configurable reasoning effort. In contrast, Qwen3.5 122B-A10B provides chain-of-thought reasoning depth for complex math and science.

Qwen3.5 397B-A17B generates approximately 64 tokens per second, while Qwen3.5 122B-A10B delivers 78 tokens per second. In latency-sensitive production environments, Qwen3.5 122B-A10B provides faster time-to-first-token (TTFT) and higher streaming response velocity.

Yes! Tiered multi-model routing can optimize for latency and accuracy: you can route high-frequency conversational turns and latency-sensitive queries to Qwen3.5 122B-A10B, and route deep architectural or complex reasoning queries to Qwen3.5 397B-A17B. This balanced routing strategy maximizes system throughput and answer quality.