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BenchLM
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Mistral Medium 3.5 128B vs Qwen3.5 Flash

Updated November 11, 2026. Rank says Qwen3.5 Flash is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.

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Decision reading

Qwen3.5 Flash has the higher public point estimate, 42.31 versus 29.7. 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
Mistral logo

Mistral

29.7/100

Estimated · Public rank #179

Conditional range 15.3–44.0

Model B
Alibaba logo

Alibaba

42.31/100

Estimated · Public rank #131

Conditional range 32.6–52.0

API price per 1M tokens

Mistral Medium 3.5 128B: $1.50 input / $7.50 output

Qwen3.5 Flash: $0.10 input / $0.40 output

Context window

Mistral Medium 3.5 128B: 256K

Qwen3.5 Flash: 1M

Released

Mistral Medium 3.5 128B: April 29, 2026

Qwen3.5 Flash: March 4, 2026

Shared results
3
Mistral Medium 3.5 128B only
4
Qwen3.5 Flash only
2
Like-for-like categories
0 / 8
Estimated: Mistral Medium 3.5 128B and Qwen3.5 Flash. 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

    Qwen3.5 Flash

    Qwen3.5 Flash has the larger documented context window.

    Confidence: documented
  • Chat turn cost

    1K fresh input + 500 output tokens

    Qwen3.5 Flash

    Qwen3.5 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.

    Confidence: listed-rates
  • Cache-heavy agent loop cost

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

    Qwen3.5 Flash

    Qwen3.5 Flash has the lower estimated token cost for this stated workload. Mistral Medium 3.5 128B has no published cached-input rate, so cached tokens use its listed input rate. Qwen3.5 Flash has no published cached-input rate, so cached tokens use its listed input rate.

    Confidence: rate-fallback
Show secondary and unsupported calls
  • Repository review cost

    50K fresh input + 3K output tokens

    Qwen3.5 Flash

    Qwen3.5 Flash 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

    Mistral Medium 3.5 128B and Qwen3.5 Flash are scored on Estimated evidence for coding, so the reading is directional rather than like-for-like.

    Confidence: limited
  • Agentic work

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

    Not enough matched evidence

    Qwen3.5 Flash is not ranked on the public lane for agentic, so no winner is named for agentic.

    Confidence: limited

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.

21.6Mistral Medium 3.5 128B28.4Qwen3.5 Flash

Directional only · BenchAlign v5.8

Qwen3.5 Flash has the higher coding point estimate. Conditional score ranges do not establish rank confidence.

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

Same basis rules as the category table below

Or describe your own job

The LLM Selector reads what you need a model for and returns a shortlist, ranked in the same order the job pages publish.

Describe the task and constraints. This selector recommends models; it cannot carry out the task or access your files and accounts.

We keep what you type here, drafts included, for 180 days, and after that only the job and requirements read from it. Nothing is tied to your IP address or account. Leave out names and other personal details. Privacy

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, reasoning, multimodal, 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.

Coding

Directional only
Mistral Medium 3.5 128B
21.6
Estimated · #134/158
Qwen3.5 Flash
28.4
Estimated · #113/158
Basis
BenchAlign v5.8 lane · 2 vs 2 public rows
Reading
Directional only

Knowledge

Directional only
Mistral Medium 3.5 128B
28.6
Supported · #160/179
Qwen3.5 Flash
43.7
Estimated · #101/179
Basis
BenchAlign v5.8 lane · 2 vs 2 public rows
Reading
Directional only

Agentic

Not comparable
Mistral Medium 3.5 128B
21.3
Supported · #115/132
Qwen3.5 Flash
Not ranked
Basis
BenchAlign v5.8 lane · 3 vs 0 public rows
Reading
Not comparable

Reasoning

Not comparable
Mistral Medium 3.5 128B
23.8
Estimated · #141/158
Qwen3.5 Flash
Not ranked
Basis
BenchAlign v5.8 lane · 0 vs 0 public rows
Reading
Not comparable

Multimodal

Not comparable
Mistral Medium 3.5 128B
Not ranked
Qwen3.5 Flash
Not ranked
Basis
BenchAlign v5.8 lane · 0 vs 0 public rows
Reading
Not comparable

Multilingual

Not comparable
Mistral Medium 3.5 128B
Not ranked
Qwen3.5 Flash
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Instruction following

Not comparable
Mistral Medium 3.5 128B
84.0
#55/157
Qwen3.5 Flash
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Math

Not comparable
Mistral Medium 3.5 128B
Not ranked
Qwen3.5 Flash
32.6
Unranked · 1 rankable row
Basis
Provisional lane · 0 vs 1 weighted rows
Reading
Not comparable

Ranks count the models scored in each category’s lane, so the agentic, coding, reasoning, multimodal, 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

Mistral Medium 3.5 128B
$0.00525
Fits in one request
Qwen3.5 Flash
$0.0003
Fits in one request

Qwen3.5 Flash has the lower modeled cost

Costs use the listed standard API rates.

Repository review

50K fresh input + 3K output tokens

Mistral Medium 3.5 128B
$0.0975
Fits in one request
Qwen3.5 Flash
$0.0062
Fits in one request

Qwen3.5 Flash has the lower modeled cost

Costs use the listed standard API rates.

Cache-heavy agent loop

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

Mistral Medium 3.5 128B
$0.405
Fits in one request
Cached input priced at the published list-input rate
Qwen3.5 Flash
$0.026
Fits in one request
Cached input priced at the published list-input rate

Qwen3.5 Flash has the lower modeled cost

Mistral Medium 3.5 128B has no published cached-input rate, so cached tokens use its listed input rate. Qwen3.5 Flash has no published cached-input rate, so cached tokens use its listed input rate.

Your workload

Enter a month of tokens to price it at both models’ listed API rates.

Mistral Medium 3.5 128B
$30.00
per month
Qwen3.5 Flash
$1.80
per month

Standard listed rates, no batch or volume discounts.

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.

Mistral Medium 3.5 128B

256K

Qwen3.5 Flash

1M

API model ID

Mistral Medium 3.5 128B

Not sourced

Qwen3.5 Flash

Not sourced

Cached-input rate

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

Mistral Medium 3.5 128B

Not published

Qwen3.5 Flash

Not published

Provider availability

Mistral Medium 3.5 128B

Not sourced

Qwen3.5 Flash

Not sourced

Reasoning profile

Mistral Medium 3.5 128B

Reasoning

Qwen3.5 Flash

Reasoning

Weight access

Mistral Medium 3.5 128B

Open Weight

Qwen3.5 Flash

Proprietary

License

Mistral Medium 3.5 128B

Open Weight

Qwen3.5 Flash

Proprietary

Release date

Mistral Medium 3.5 128B

2026-04-29

Qwen3.5 Flash

2026-03-04

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
Qwen3.5 Flash has the higher public point estimate, 42.31 versus 29.7. Their conditional score ranges overlap. These ranges do not establish rank confidence.
Workload cost
Repository review: $0.0975 vs $0.0062. Cache-heavy agent loop: $0.405 vs $0.026.
Context tradeoff
Qwen3.5 Flash has the larger documented window (1M).
Run the same representative tasks against both endpoints before changing production traffic.

Questions

Which is better, Mistral Medium 3.5 128B or Qwen3.5 Flash?

Qwen3.5 Flash has the higher public point estimate, 42.31 versus 29.7. 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, Mistral Medium 3.5 128B or Qwen3.5 Flash?

Qwen3.5 Flash scores higher for coding on the public lane, 28.4 to 21.6. Mistral Medium 3.5 128B and Qwen3.5 Flash are scored on Estimated evidence for coding, so the reading is directional rather than like-for-like. BenchLM does not name a winner for coding from a directional reading; read the shared benchmark rows directly and test the models on the same task set.

Which is better for agentic tasks, Mistral Medium 3.5 128B or Qwen3.5 Flash?

Qwen3.5 Flash is not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.

Which costs less, Mistral Medium 3.5 128B or Qwen3.5 Flash?

For the stated presets, chat costs $0.00525 on Mistral Medium 3.5 128B and $0.0003 on Qwen3.5 Flash; repository review costs $0.0975 and $0.0062; the cache-heavy agent loop costs $0.405 and $0.026. Mistral Medium 3.5 128B has no published cached-input rate, so cached tokens use its listed input rate. Qwen3.5 Flash has no published cached-input rate, so cached tokens use its listed input rate.

Which has the larger context window, Mistral Medium 3.5 128B or Qwen3.5 Flash?

Qwen3.5 Flash has the larger documented context window: 1M, compared with 256K.

Self-host vs API cost

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

Mistral Medium 3.5 128B
API / mo$6,750
Self-host / mo$6,990
Break-even52M/day
Qwen3.5 Flash
API / mo$375
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 evidence9 rows

Agentic

  • τ³-bench results

    Mistral Medium 3.5 128B91.4%
    Source
    Qwen3.5 Flash—

    Not directly comparable

  • Gert Labs

    Mistral Medium 3.5 128B39.10%
    Source
    Qwen3.5 Flash—

    Not directly comparable

  • Terminal-Bench 2.1 (Vals)

    Mistral Medium 3.5 128B39.0%
    Source
    Qwen3.5 Flash—

    Not directly comparable

Coding

  • SWE-bench Verified

    Mistral Medium 3.5 128B77.6%
    Source
    Qwen3.5 Flash—

    Not directly comparable

  • SWE-bench (Vals)

    Mistral Medium 3.5 128B66.4%
    Source
    Qwen3.5 Flash64.4%
    Source

    Mistral Medium 3.5 128B leads this result

  • LiveCodeBench (Vals)

    Mistral Medium 3.5 128B—
    Qwen3.5 Flash83.3%
    Source

    Not directly comparable

Knowledge

  • GPQA Diamond (Vals)

    Mistral Medium 3.5 128B34.8%
    Source
    Qwen3.5 Flash82.8%
    Source

    Qwen3.5 Flash leads this result

  • MMLU-Pro (Vals)

    Mistral Medium 3.5 128B75.3%
    Source
    Qwen3.5 Flash84.1%
    Source

    Qwen3.5 Flash leads this result

Math

  • FrontierMath v2 (Tiers 1-3)

    Mistral Medium 3.5 128B—
    Qwen3.5 Flash18.246%
    Source

    Not directly comparable

9 public results · 3 shared

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Last updated November 11, 2026