Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Composer 2 and Qwen3.5 397B finish on the same overall score, so this is less about a single winner and more about where the edge shows up. The headline says tie; the benchmark table is where the real choice happens.
Composer 2 is also the more expensive model on tokens at $0.50 input / $2.50 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Qwen3.5 397B. That is roughly Infinityx on output cost alone. Composer 2 is the reasoning model in the pair, while Qwen3.5 397B is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Composer 2 gives you the larger context window at 200K, compared with 128K for Qwen3.5 397B.
Treat this as a split decision. Composer 2 makes more sense if agentic is the priority or you need the larger 200K context window; Qwen3.5 397B is the better fit if you want the cheaper token bill or you would rather avoid the extra latency and token burn of a reasoning model.
Composer 2
61.7
Qwen3.5 397B
56.9
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Composer 2 and Qwen3.5 397B are tied on overall score, so the right pick depends on which category matters most for your use case.
Composer 2 has the edge for agentic tasks in this comparison, averaging 61.7 versus 56.9. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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