Leanstral vs Qwen3.5 397B

Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.

Benchmark data for one or both models is coming soon. This page currently shows metadata and pricing where BenchLM has it, and score-level comparisons will populate as public benchmark results land.

BenchLM does not have sourced benchmark coverage for Leanstral yet. This comparison is currently limited to metadata such as context window, reasoning mode, and pricing where available.

Leanstral has the larger context window at 256K, compared with 128K for Qwen3.5 397B.

Quick Verdict

Benchmark data for Leanstral and Qwen3.5 397B is coming soon on BenchLM.

Agentic

Coming soon

Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.

Coming soon
Terminal-Bench 2.0
52.5%

Coding

Qwen3.5 397B

Leanstral

21.9

Qwen3.5 397B

83.6

21.9%
FLTEval
Coming soon
Coming soon
HumanEval
75%
Coming soon
LiveCodeBench
83.6%
Coming soon
SWE-bench Verified
76.4%

Multimodal & Grounded

Coming soon

Benchmark data for this category is coming soon.

Reasoning

Coming soon

Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.

Coming soon
SimpleQA
80%
Coming soon
MuSR
78%

Knowledge

Coming soon

Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.

Coming soon
MMLU
83%
Coming soon
GPQA
88.4%
Coming soon
SuperGPQA
80%
Coming soon
OpenBookQA
78%
Coming soon
MMLU-Pro
87.8%
Coming soon
HLE
28.7%

Instruction Following

Coming soon

Benchmark data for this category is coming soon.

Multilingual

Coming soon

Benchmark data for this category is coming soon.

Mathematics

Coming soon

Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.

Coming soon
AIME 2023
83%
Coming soon
AIME 2024
85%
Coming soon
AIME 2025
84%
Coming soon
HMMT Feb 2023
79%
Coming soon
HMMT Feb 2024
81%
Coming soon
HMMT Feb 2025
80%
Coming soon
BRUMO 2025
82%

Frequently Asked Questions

Can I compare Leanstral and Qwen3.5 397B on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.

Why does this comparison show “coming soon”?

BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.

What data is available for Leanstral and Qwen3.5 397B today?

Leanstral: $0.00 input / $0.00 output per 1M tokens Qwen3.5 397B: $0.00 input / $0.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.

Last updated: March 17, 2026

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