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BenchLM
Data

Claude Sonnet 5.5 vs Mistral Medium 3.5 128B

Updated November 12, 2026. Rank says Claude Sonnet 5.5 is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.

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Decision reading

Claude Sonnet 5.5 has the higher public point estimate, 83.07 versus 28.2. Their conditional score ranges do not overlap. These ranges do not establish rank confidence. 1 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.

Model A
Anthropic logo

Anthropic

83.07/100

Supported · Public rank #6

90% interval 78.8–87.3

Model B
Mistral logo

Mistral

28.2/100

Estimated · Public rank #191

Conditional range 13.8–42.5

API price per 1M tokens

Claude Sonnet 5.5: $2 input / $10 output

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

Context window

Claude Sonnet 5.5: 1M

Mistral Medium 3.5 128B: 256K

Released

Claude Sonnet 5.5: September 28, 2026

Mistral Medium 3.5 128B: April 29, 2026

Shared results
1
Claude Sonnet 5.5 only
63
Mistral Medium 3.5 128B only
6
Like-for-like categories
2 / 8
Supported: Claude Sonnet 5.5 · Estimated: Mistral Medium 3.5 128B. 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.

  • Agentic work

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

    Claude Sonnet 5.5

    Claude Sonnet 5.5 has the higher public agentic point estimate, 72.7 to 19.9, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

    Confidence: limited
  • Long documents

    Prompts that approach the documented context limit

    Claude Sonnet 5.5

    Claude Sonnet 5.5 has the larger documented context window.

    Confidence: documented
  • Chat turn cost

    1K fresh input + 500 output tokens

    Mistral Medium 3.5 128B

    Mistral Medium 3.5 128B 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
  • Cache-heavy agent loop cost

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

    Claude Sonnet 5.5

    Claude Sonnet 5.5 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.

    Confidence: rate-fallback
  • Repository review cost

    50K fresh input + 3K output tokens

    Mistral Medium 3.5 128B

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

    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.

81.0Claude Sonnet 5.519.6Mistral Medium 3.5 128B

Directional only · BenchAlign v5.8

Claude Sonnet 5.5 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.

A shared-evidence shape is not available.

BenchLM does not draw a radar or infer missing axes when the matched evidence is too sparse.

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.

Agentic

Like-for-like
Claude Sonnet 5.5
72.7
Supported · #9/135
Mistral Medium 3.5 128B
19.9
Supported · #118/135
Basis
BenchAlign v5.8 lane · 19 vs 3 public rows
Reading
Claude Sonnet 5.5 leads

Knowledge

Like-for-like
Claude Sonnet 5.5
82.1
Supported · #6/180
Mistral Medium 3.5 128B
28.4
Supported · #150/180
Basis
BenchAlign v5.8 lane · 17 vs 2 public rows
Reading
Claude Sonnet 5.5 leads

Coding

Directional only
Claude Sonnet 5.5
81.0
Supported · #4/162
Mistral Medium 3.5 128B
19.6
Estimated · #135/162
Basis
BenchAlign v5.8 lane · 12 vs 2 public rows
Reading
Directional only

Reasoning

Directional only
Claude Sonnet 5.5
77.0
Supported · #6/160
Mistral Medium 3.5 128B
22.7
Estimated · #143/160
Basis
BenchAlign v5.8 lane · 0 vs 0 public rows
Reading
Directional only

Multimodal

Not comparable
Claude Sonnet 5.5
78.9
Estimated · #7/67
Mistral Medium 3.5 128B
Not ranked
Basis
BenchAlign v5.8 lane · 10 vs 0 public rows
Reading
Not comparable

Multilingual

Not comparable
Claude Sonnet 5.5
Not ranked
Mistral Medium 3.5 128B
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Instruction following

Not comparable
Claude Sonnet 5.5
Not ranked
Mistral Medium 3.5 128B
84.0
#54/157
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Math

Not comparable
Claude Sonnet 5.5
89.7
Unranked · 4 rankable rows
Mistral Medium 3.5 128B
Not ranked
Basis
Provisional lane · 2 vs 0 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

Claude Sonnet 5.5
$0.007
Fits in one request
Mistral Medium 3.5 128B
$0.00525
Fits in one request

Mistral Medium 3.5 128B has the lower modeled cost

Costs use the listed standard API rates.

Repository review

50K fresh input + 3K output tokens

Claude Sonnet 5.5
$0.13
Fits in one request
Mistral Medium 3.5 128B
$0.0975
Fits in one request

Mistral Medium 3.5 128B has the lower modeled cost

Costs use the listed standard API rates.

Cache-heavy agent loop

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

Claude Sonnet 5.5
$0.16
Fits in one request
Mistral Medium 3.5 128B
$0.405
Fits in one request
Cached input priced at the published list-input rate

Claude Sonnet 5.5 has the lower modeled cost

Mistral Medium 3.5 128B 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.

Claude Sonnet 5.5
$40.00
per month
Mistral Medium 3.5 128B
$30.00
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.

Cached-input rate

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

Claude Sonnet 5.5

$0.1 per 1M cached input tokens

Claude API pricing

Mistral Medium 3.5 128B

Not published

Reasoning profile

Claude Sonnet 5.5

Reasoning

Mistral Medium 3.5 128B

Reasoning

Weight access

Claude Sonnet 5.5

Proprietary

Mistral Medium 3.5 128B

Open Weight

License

Claude Sonnet 5.5

Proprietary

Mistral Medium 3.5 128B

Open Weight

Release date

Claude Sonnet 5.5

2026-09-28

Mistral Medium 3.5 128B

2026-04-29

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
Claude Sonnet 5.5 has the higher public point estimate, 83.07 versus 28.2. Their conditional score ranges do not overlap. These ranges do not establish rank confidence.
Workload cost
Repository review: $0.13 vs $0.0975. Cache-heavy agent loop: $0.16 vs $0.405.
Context tradeoff
Claude Sonnet 5.5 has the larger documented window (1M).
Run the same representative tasks against both endpoints before changing production traffic.

Questions

Which is better, Claude Sonnet 5.5 or Mistral Medium 3.5 128B?

Claude Sonnet 5.5 has the higher public point estimate, 83.07 versus 28.2. Their conditional score ranges do not 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, Claude Sonnet 5.5 or Mistral Medium 3.5 128B?

Claude Sonnet 5.5 scores higher for coding on the public lane, 81 to 19.6. Mistral Medium 3.5 128B is 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, Claude Sonnet 5.5 or Mistral Medium 3.5 128B?

Claude Sonnet 5.5 has the higher public agentic tasks point estimate, 72.7 to 19.9, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

Which costs less, Claude Sonnet 5.5 or Mistral Medium 3.5 128B?

For the stated presets, chat costs $0.007 on Claude Sonnet 5.5 and $0.00525 on Mistral Medium 3.5 128B; repository review costs $0.13 and $0.0975; the cache-heavy agent loop costs $0.16 and $0.405. Mistral Medium 3.5 128B has no published cached-input rate, so cached tokens use its listed input rate.

Which has the larger context window, Claude Sonnet 5.5 or Mistral Medium 3.5 128B?

Claude Sonnet 5.5 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.

Claude Sonnet 5.5
API / mo$9,000
Self-host / moNot listed
Break-even—
Proprietary model — self-hosting not applicable.
Mistral Medium 3.5 128B
API / mo$6,750
Self-host / mo$6,990
Break-even52M/day
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 evidence70 rows

Agentic

  • Terminal-Bench 4.1

    Claude Sonnet 5.563.90%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Terminal-Bench 4.0

    Claude Sonnet 5.570.60%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • HLE w/ tools

    Claude Sonnet 5.564.5%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • DRACO

    Claude Sonnet 5.587.0%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Terminal-Bench-Science 0.1

    Claude Sonnet 5.559.9%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • LAB all-pass (Harvey held-out)

    Claude Sonnet 5.510.0%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • LAB criterion-pass (Harvey held-out)

    Claude Sonnet 5.593.1%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Toolathlon Verified Pass@3

    Claude Sonnet 5.585.2%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Toolathlon Verified Pass³

    Claude Sonnet 5.568.5%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Toolathlon Verified avg. turns

    Claude Sonnet 5.531.6 turns
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • AutomationBench (Zapier 1.0.6)

    Claude Sonnet 5.544.70%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Toolathlon-Verified

    Claude Sonnet 5.577.8%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Hermes Index

    Claude Sonnet 5.553.1%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Hermes Bench

    Claude Sonnet 5.573.5%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • MazeBench

    Claude Sonnet 5.58%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • OSWorld 2.1

    Claude Sonnet 5.580.1%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • OSWorld 2.1 Offline

    Claude Sonnet 5.583.9%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Binary Exploitation Benchmark

    Claude Sonnet 5.548
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Terminal-Bench 2.1 (Vals)

    Claude Sonnet 5.583.1%
    Source
    Mistral Medium 3.5 128B39.0%
    Source

    Claude Sonnet 5.5 leads this result

  • τ³-bench results

    Claude Sonnet 5.5—
    Mistral Medium 3.5 128B91.4%
    Source

    Not directly comparable

  • Gert Labs

    Claude Sonnet 5.5—
    Mistral Medium 3.5 128B39.10%
    Source

    Not directly comparable

Coding

  • FrontierCode 1.1 Main

    Claude Sonnet 5.546.2%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • CursorBench 4.0

    Claude Sonnet 5.555.5%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • SWE-bench Pro

    Claude Sonnet 5.581.3%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • SWE Multilingual

    Claude Sonnet 5.590.3%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • SWE Multimodal

    Claude Sonnet 5.554.3%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • DeepSWE

    Claude Sonnet 5.571.0%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • FrontierCode 1.1 Extended

    Claude Sonnet 5.559.1%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • ProgramBench

    Claude Sonnet 5.579.7%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • FrontierSWE v2

    Claude Sonnet 5.561.9%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Bug Hunt Bench

    Claude Sonnet 5.551.3 fixes
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • FrontierCode 2.0

    Claude Sonnet 5.541.0%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • VulcanBench Frontier v4

    Claude Sonnet 5.592.0%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • SWE-bench Verified

    Claude Sonnet 5.5—
    Mistral Medium 3.5 128B77.6%
    Source

    Not directly comparable

  • SWE-bench (Vals)

    Claude Sonnet 5.5—
    Mistral Medium 3.5 128B66.4%
    Source

    Not directly comparable

Multimodal

  • ExtractBench Pro

    Claude Sonnet 5.532%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • ExtractBench (LlamaIndex)

    Claude Sonnet 5.594.68%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • ParseBench

    Claude Sonnet 5.569.21%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Chartography (no tools)

    Claude Sonnet 5.561.6%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Chartography (tools)

    Claude Sonnet 5.590.2%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • BenchCAD Vision2Code (no tools)

    Claude Sonnet 5.50.747
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • BenchCAD Vision2Code (tools)

    Claude Sonnet 5.50.963
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Biomedical image analysis

    Claude Sonnet 5.572.2%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • OfficeQA

    Claude Sonnet 5.576.9%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • OfficeQA Pro

    Claude Sonnet 5.565.6%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

Knowledge

  • HealthBench (raw)

    Claude Sonnet 5.569.4%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • HealthBench (length-adjusted)

    Claude Sonnet 5.565.4%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • HealthBench Professional (raw)

    Claude Sonnet 5.577.1%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • HealthBench Professional

    Claude Sonnet 5.569.2%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • BioMysteryBench (human-solvable)

    Claude Sonnet 5.589.2%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • BioMysteryBench (human-difficult)

    Claude Sonnet 5.544.7%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • SpatialBench Verified

    Claude Sonnet 5.572.5%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • SingleCellBench

    Claude Sonnet 5.559.1%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Protein Design

    Claude Sonnet 5.551.0%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Morphology-to-molecule matching

    Claude Sonnet 5.525.0%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Medicinal chemistry

    Claude Sonnet 5.565.3%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Protein Design library ranking

    Claude Sonnet 5.554.8%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • De novo protein-binder design

    Claude Sonnet 5.582.3%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Protocols (troubleshooting)

    Claude Sonnet 5.567.3%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • Protocols (understanding)

    Claude Sonnet 5.566.6%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • HLE w/o tools

    Claude Sonnet 5.556.9%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • PhysicianBench

    Claude Sonnet 5.563.2%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • GPQA Diamond (Vals)

    Claude Sonnet 5.5—
    Mistral Medium 3.5 128B34.8%
    Source

    Not directly comparable

  • MMLU-Pro (Vals)

    Claude Sonnet 5.5—
    Mistral Medium 3.5 128B75.3%
    Source

    Not directly comparable

Multilingual

  • GMMLU

    Claude Sonnet 5.592.1%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • MILU

    Claude Sonnet 5.591.6%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

Math

  • ArXivMath Aug. 2026 (no tools)

    Claude Sonnet 5.586.8%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • ArXivMath Aug. 2026 (tools)

    Claude Sonnet 5.595.2%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • FrontierMath v2 (Tiers 1-3)

    Claude Sonnet 5.588.772%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

  • FrontierMath v2 (Tier 4)

    Claude Sonnet 5.580.488%
    Source
    Mistral Medium 3.5 128B—

    Not directly comparable

70 public results · 1 shared

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Last updated November 12, 2026