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BenchLM
Data

DeepSeek V4.1 Flash 1017 vs Qwen3.5 397B

Updated October 25, 2026. Rank says DeepSeek V4.1 Flash 1017 is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.

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Decision reading

DeepSeek V4.1 Flash 1017 has the higher public point estimate, 65.78 versus 55.42. Their conditional score ranges overlap. These ranges do not establish rank confidence. 3 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.

Model A
DeepSeek logo

DeepSeek

65.78/100

Supported · Public rank #35

90% interval 60.8–70.8

Model B
Alibaba logo

Alibaba

55.42/100

Estimated · Public rank #68

Conditional range 41.1–69.8

Shared results
3
DeepSeek V4.1 Flash 1017 only
30
Qwen3.5 397B only
59
Like-for-like categories
0 / 8
Supported: DeepSeek V4.1 Flash 1017 · Estimated: Qwen3.5 397B. Conditional ranges do not establish rank confidence.How the comparison works

Which one for your work

Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.

  • Long documents

    Prompts that approach the documented context limit

    DeepSeek V4.1 Flash 1017

    DeepSeek V4.1 Flash 1017 has the larger documented context window.

    Confidence: documented
  • Chat turn cost

    1K fresh input + 500 output tokens

    DeepSeek V4.1 Flash 1017

    DeepSeek V4.1 Flash 1017 has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.

    Confidence: listed-rates
Show secondary and unsupported calls
  • Repository review cost

    50K fresh input + 3K output tokens

    DeepSeek V4.1 Flash 1017

    DeepSeek V4.1 Flash 1017 has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.

    Confidence: listed-rates
  • Coding work

    Code generation, repair, and software-engineering tasks

    Not enough matched evidence

    Qwen3.5 397B is not ranked on the public lane for coding, so no winner is named for coding.

    Confidence: limited
  • Agentic work

    Tool use, computer use, and multi-step task completion

    Not enough matched evidence

    Qwen3.5 397B is scored on Estimated evidence for agentic, so the reading is directional rather than like-for-like.

    Confidence: limited
  • Cache-heavy agent loop cost

    200K cached + 20K fresh input + 10K output tokens

    Not enough matched evidence

    The page does not recommend a cost winner because at least one model cannot fit the stated workload in one request. Qwen3.5 397B does not fit this workload in one request. Qwen3.5 397B has no published cached-input rate, so cached tokens use its listed input rate.

    Confidence: rate-fallback

Which one for a specific job

Choose a job from the LLM Selector's task catalog to see the category row it rests on, under the same basis rules as the table below. A directional row stays directional; choosing a job never creates a winner.

The same task catalog as the LLM Selector. Each job names the evidence surface it rests on; nothing here adds a new score.

61.1DeepSeek V4.1 Flash 1017—Qwen3.5 397B

Not comparable · BenchAlign v5.8

The coding row is not comparable on the public lane: at least one model is not measured or not ranked there.

Coding scores combine specific tasks and setups. Match the editor, harness, and effort to your workflow.

Same basis rules as the category table below

What is actually comparable

Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.

2 categories rest on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.

Shape of the matched evidence

Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.

Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.

Bars run 0–100 on each benchmark’s normalized display scale

Category results, on a stated basis

Each row shows the public-lane category score for both models: the BenchAlign v5.8 lane for agentic, coding, and knowledge, and the weighted public rows elsewhere, with the same rank each model page reports. A row is like-for-like only when both scores rest on Supported evidence or the same weighted set. Directional and not-comparable rows remain visible, but they never receive a winner.

Agentic

Directional only
DeepSeek V4.1 Flash 1017
61.7
Supported · #24/132
Qwen3.5 397B
44.3
Estimated · #62/132
Basis
BenchAlign v5.8 lane · 11 vs 14 public rows
Reading
Directional only

Knowledge

Directional only
DeepSeek V4.1 Flash 1017
64.4
Supported · #37/187
Qwen3.5 397B
52.7
Estimated · #70/187
Basis
BenchAlign v5.8 lane · 3 vs 6 public rows
Reading
Directional only

Coding

Not comparable
DeepSeek V4.1 Flash 1017
61.1
Supported · #18/153
Qwen3.5 397B
Not ranked
Basis
BenchAlign v5.8 lane · 8 vs 6 public rows
Reading
Not comparable

Reasoning

Not comparable
DeepSeek V4.1 Flash 1017
82.5
Unranked · 4 rankable rows
Qwen3.5 397B
74.1
Unranked · 2 rankable rows
Basis
Provisional lane · 0 vs 1 weighted rows
Reading
Not comparable

Multimodal

Not comparable
DeepSeek V4.1 Flash 1017
78.8
Unranked · 1 rankable row
Qwen3.5 397B
73.4
#29/56
Basis
Provisional lane · 0 vs 2 weighted rows
Reading
Not comparable

Multilingual

Not comparable
DeepSeek V4.1 Flash 1017
Not ranked
Qwen3.5 397B
93.8
#5/17
Basis
Provisional lane · 0 vs 1 weighted rows
Reading
Not comparable

Instruction following

Not comparable
DeepSeek V4.1 Flash 1017
Not ranked
Qwen3.5 397B
79.9
#61/153
Basis
Provisional lane · 0 vs 1 weighted rows
Reading
Not comparable

Math

Not comparable
DeepSeek V4.1 Flash 1017
70.1
Unranked · 3 rankable rows
Qwen3.5 397B
81.7
Unranked · 5 rankable rows
Basis
Provisional lane · 2 vs 2 weighted rows
Reading
Not comparable

Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign v5.8) differ from the provisional-lane categories. Unranked scores sit on the provisional lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.

Supported evidence per lane · bars run 0–100Methodology

What each workload costs

Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.

Chat turn

1K fresh input + 500 output tokens

DeepSeek V4.1 Flash 1017
$0.0009
Fits in one request
Qwen3.5 397B
$0.0024
Fits in one request

DeepSeek V4.1 Flash 1017 has the lower modeled cost

Costs use the listed standard API rates.

Repository review

50K fresh input + 3K output tokens

DeepSeek V4.1 Flash 1017
$0.0186
Fits in one request
Qwen3.5 397B
$0.0408
Fits in one request

DeepSeek V4.1 Flash 1017 has the lower modeled cost

Costs use the listed standard API rates.

Cache-heavy agent loop

200K cached + 20K fresh input + 10K output tokens

DeepSeek V4.1 Flash 1017
$0.0192
Fits in one request
Qwen3.5 397B
$0.168
Does not fit in one request
Cached input priced at the published list-input rate

Qwen3.5 397B does not fit this workload in one request. Qwen3.5 397B has no published cached-input rate, so cached tokens use its listed input rate.

Cached input falls back to the list input rate only where a cached rate is unpublished

Specification differences

Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.

Context window

Maximum documented context; output-token limits may be lower.

DeepSeek V4.1 Flash 1017

Qwen3.5 397B

128K

Cached-input rate

A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.

DeepSeek V4.1 Flash 1017

$0.006 per 1M cached input tokens

DeepSeek: Models & Pricing

Qwen3.5 397B

Not published

Reasoning profile

DeepSeek V4.1 Flash 1017

Reasoning

Qwen3.5 397B

Non-Reasoning

Weight access

DeepSeek V4.1 Flash 1017

Open Weight

Qwen3.5 397B

Open Weight

License

DeepSeek V4.1 Flash 1017

Open Weight

Qwen3.5 397B

Open Weight

Release date

DeepSeek V4.1 Flash 1017

2026-10-17

Qwen3.5 397B

2026-02-16

If you already use one of these models

Deployment change
The models list different providers, so authentication, endpoint behavior, limits, and feature support may change.
Quality signal
DeepSeek V4.1 Flash 1017 has the higher public point estimate, 65.78 versus 55.42. Their conditional score ranges overlap. These ranges do not establish rank confidence.
Workload cost
Repository review: $0.0186 vs $0.0408. Cache-heavy agent loop: $0.0192 vs $0.168.
Context tradeoff
DeepSeek V4.1 Flash 1017 has the larger documented window (1M).
Run the same representative tasks against both endpoints before changing production traffic.

Questions

Which is better, DeepSeek V4.1 Flash 1017 or Qwen3.5 397B?

DeepSeek V4.1 Flash 1017 has the higher public point estimate, 65.78 versus 55.42. Their conditional score ranges overlap. These ranges do not establish rank confidence. The page therefore keeps the decision tied to the specific documented workload.

Which is better for coding, DeepSeek V4.1 Flash 1017 or Qwen3.5 397B?

Qwen3.5 397B is not ranked on the public lane for coding, so no winner is named for coding.

Which is better for agentic tasks, DeepSeek V4.1 Flash 1017 or Qwen3.5 397B?

DeepSeek V4.1 Flash 1017 scores higher for agentic tasks on the public lane, 61.7 to 44.3. Qwen3.5 397B is scored on Estimated evidence for agentic tasks, so the reading is directional rather than like-for-like. BenchLM does not name a winner for agentic tasks from a directional reading; read the shared benchmark rows directly and test the models on the same task set.

Which costs less, DeepSeek V4.1 Flash 1017 or Qwen3.5 397B?

For the stated presets, chat costs $0.0009 on DeepSeek V4.1 Flash 1017 and $0.0024 on Qwen3.5 397B; repository review costs $0.0186 and $0.0408; the cache-heavy agent loop costs $0.0192 and $0.168. Qwen3.5 397B does not fit this workload in one request. Qwen3.5 397B has no published cached-input rate, so cached tokens use its listed input rate.

Which has the larger context window, DeepSeek V4.1 Flash 1017 or Qwen3.5 397B?

DeepSeek V4.1 Flash 1017 has the larger documented context window: 1M, compared with 128K.

Self-host vs API cost

Estimates at 50,000 req/day · 1000 tokens/req average.

DeepSeek V4.1 Flash 1017
API / mo$1,125
Self-host / mo$27,962
Break-even1.6B/day
Qwen3.5 397B
API / mo$3,150
Self-host / moNot listed
Break-even—
Proprietary model — self-hosting not applicable.
Model the full break-even

Benchmark evidence

The full public result ledger is available for audit without forcing a wide desktop table onto a phone.

Browse raw public benchmark evidence92 rows

Agentic

  • Terminal-Bench 2.1

    DeepSeek V4.1 Flash 101790.6%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • terminalBench3

    DeepSeek V4.1 Flash 101730%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • Terminal-Bench 4.0

    DeepSeek V4.1 Flash 101742.30%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • CyberGym

    DeepSeek V4.1 Flash 101788.1%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • ExploitGym

    DeepSeek V4.1 Flash 101715.3%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • HLE w/ tools

    DeepSeek V4.1 Flash 101763.9%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • AutomationBench

    DeepSeek V4.1 Flash 101760.5%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • Agents' Last Exam

    DeepSeek V4.1 Flash 101735.4%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • Terminal-Bench 2.1 (Vals)

    DeepSeek V4.1 Flash 101774.5%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • CWE-bench v1

    DeepSeek V4.1 Flash 101755.0%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • MazeBench

    DeepSeek V4.1 Flash 10171%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • Terminal-Bench 2.0

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B52.5%
    Source

    Not directly comparable

  • BrowseComp

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B69%
    Source

    Not directly comparable

  • OSWorld-Verified

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B62.2%
    Source

    Not directly comparable

  • Claw-Eval

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B56.8%
    Source

    Not directly comparable

  • QwenClawBench

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B51.8%
    Source

    Not directly comparable

  • τ³-bench results

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B68.4%
    Source

    Not directly comparable

  • VITA-Bench

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B43.7%
    Source

    Not directly comparable

  • DeepPlanning

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B37.6%
    Source

    Not directly comparable

  • Toolathlon

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B36.3%
    Source

    Not directly comparable

  • MCP Atlas

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B46.1%
    Source

    Not directly comparable

  • MCP-Tasks

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B74.2%
    Source

    Not directly comparable

  • WideResearch

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B74.0%
    Source

    Not directly comparable

  • Gert Labs

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B46.76%
    Source

    Not directly comparable

  • ResearchClawBench

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B14.2%
    Source

    Not directly comparable

Coding

  • Codeforces

    DeepSeek V4.1 Flash 10173471.0
    Source
    Qwen3.5 397B—

    Not directly comparable

  • Terminal-Bench 2.1

    DeepSeek V4.1 Flash 101790.6%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • terminalBench3

    DeepSeek V4.1 Flash 101730%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • DeepSWE

    DeepSeek V4.1 Flash 101777.0%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • ProgramBench

    DeepSeek V4.1 Flash 101729.1%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • NL2Repo

    DeepSeek V4.1 Flash 101768.2%
    Source
    Qwen3.5 397B32.2%
    Source

    DeepSeek V4.1 Flash 1017 leads this result

  • OpenHarmony Bench

    DeepSeek V4.1 Flash 101760.3%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • Bug Hunt Bench

    DeepSeek V4.1 Flash 101739.1 fixes
    Source
    Qwen3.5 397B—

    Not directly comparable

  • SWE-bench Verified

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B76.2%
    Source

    Not directly comparable

  • LiveCodeBench v6

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B83.6%
    Source

    Not directly comparable

  • SWE-bench Pro

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B50.9%
    Source

    Not directly comparable

  • SWE Multilingual

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B69.3%
    Source

    Not directly comparable

  • Terminal-Bench 2.0

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B52.5%
    Source

    Not directly comparable

Reasoning

  • STEMBench

    DeepSeek V4.1 Flash 10172.49
    Source
    Qwen3.5 397B—

    Not directly comparable

  • JevBench 1.4

    DeepSeek V4.1 Flash 10174.77
    Source
    Qwen3.5 397B—

    Not directly comparable

  • JevBench 1.5

    DeepSeek V4.1 Flash 10176.65
    Source
    Qwen3.5 397B—

    Not directly comparable

  • LongBench v2

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B63.2%
    Source

    Not directly comparable

  • AI-Needle

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B68.7%
    Source

    Not directly comparable

Multimodal

  • ExtractBench (LlamaIndex)

    DeepSeek V4.1 Flash 101787.11%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • ParseBench

    DeepSeek V4.1 Flash 101764.56%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • Chartography (tools)

    DeepSeek V4.1 Flash 101783.0%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • BabyVision w/ Python

    DeepSeek V4.1 Flash 101792.5%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • ZeroBench w/ Python

    DeepSeek V4.1 Flash 101751.0%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • MMMU

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B85.0%
    Source

    Not directly comparable

  • MMMU-Pro

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B79%
    Source

    Not directly comparable

  • RealWorldQA

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B83.9%
    Source

    Not directly comparable

  • OmniDocBench 1.5

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B90.8%
    Source

    Not directly comparable

  • Video-MME (with subtitle)

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B87.5%
    Source

    Not directly comparable

  • Video-MME (w/o subtitle)

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B83.7%
    Source

    Not directly comparable

  • MathVision

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B88.6%
    Source

    Not directly comparable

  • We-Math

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B87.9%
    Source

    Not directly comparable

  • DynaMath

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B86.3%
    Source

    Not directly comparable

  • SimpleVQA

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B67.1%
    Source

    Not directly comparable

  • CharXiv

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B80.8%
    Source

    Not directly comparable

  • MMLongBench-Doc

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B61.5%
    Source

    Not directly comparable

  • CC-OCR

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B82.0%
    Source

    Not directly comparable

  • AI2D_TEST

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B93.9%
    Source

    Not directly comparable

  • CountBench

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B97.2%
    Source

    Not directly comparable

  • RefCOCO (avg)

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B92.3%
    Source

    Not directly comparable

  • ODINW13

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B47.0%
    Source

    Not directly comparable

  • ERQA

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B67.5%
    Source

    Not directly comparable

  • VideoMMMU

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B84.7%
    Source

    Not directly comparable

  • MLVU (M-Avg)

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B86.7%
    Source

    Not directly comparable

  • ScreenSpot Pro

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B65.6%
    Source

    Not directly comparable

  • V*

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B95.8%
    Source

    Not directly comparable

Knowledge

  • GPQA

    DeepSeek V4.1 Flash 101790.9%
    Source
    Qwen3.5 397B88.4%
    Source

    DeepSeek V4.1 Flash 1017 leads this result

  • GPQA-D

    DeepSeek V4.1 Flash 101790.9%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • HLE

    DeepSeek V4.1 Flash 101742.6%
    Source
    Qwen3.5 397B28.7%
    Source

    DeepSeek V4.1 Flash 1017 leads this result

  • SuperGPQA

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B70.4%
    Source

    Not directly comparable

  • MMLU-Pro

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B87.8%
    Source

    Not directly comparable

  • MMLU-Redux

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B94.9%
    Source

    Not directly comparable

  • C-Eval

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B93%
    Source

    Not directly comparable

Multilingual

  • MMLU-ProX

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B84.7%
    Source

    Not directly comparable

  • NOVA-63

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B59.1%
    Source

    Not directly comparable

  • INCLUDE

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B85.6%
    Source

    Not directly comparable

  • PolyMath

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B73.3%
    Source

    Not directly comparable

  • MAXIFE

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B88.2%
    Source

    Not directly comparable

Instruction following

  • IFEval

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B92.6%
    Source

    Not directly comparable

  • IFBench

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B76.5%
    Source

    Not directly comparable

Math

  • Apex

    DeepSeek V4.1 Flash 101765.6%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • FrontierMath v2 (Tiers 1-3)

    DeepSeek V4.1 Flash 101767.368%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • FrontierMath v2 (Tier 4)

    DeepSeek V4.1 Flash 101726.829%
    Source
    Qwen3.5 397B—

    Not directly comparable

  • AIME26

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B93.3%
    Source

    Not directly comparable

  • HMMT Feb 2025

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B94.8%
    Source

    Not directly comparable

  • HMMT Nov 2025

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B92.7%
    Source

    Not directly comparable

  • HMMT Feb 2026

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B87.9%
    Source

    Not directly comparable

  • MMAnswerBench

    DeepSeek V4.1 Flash 1017—
    Qwen3.5 397B80.9%
    Source

    Not directly comparable

92 public results · 3 shared

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Last updated October 25, 2026