Agentic
Like-for-like- Claude Sonnet 5
- 65.9
- Supported · #11/153
- Mistral Medium 3.5 128B
- 22.2
- Supported · #151/153
- Basis
- BenchAlign lane · 7 vs 3 public rows
- Reading
- Claude Sonnet 5 leads
Claude Sonnet 5 vs Mistral Medium 3.5 128B
Updated September 14, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.
Decision reading
Claude Sonnet 5 has the higher public score, 69.92 versus 42.45, and the 90% score intervals do not overlap.
5 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
Share or export
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
Claude Sonnet 5 leads on the public agentic lane, 65.9 to 22.2, with Supported evidence for both models and non-overlapping 90% intervals.
Confidence: stronger
Long documents
Prompts that approach the documented context limit
Claude Sonnet 5
Claude Sonnet 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
Claude Sonnet 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
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
21 Claude Sonnet 5 only
5 Shared
2 Mistral Medium 3.5 128B only
- Shared results
- 5
- Claude Sonnet 5 only
- 21
- Mistral Medium 3.5 128B only
- 2
- Like-for-like categories
- 2 / 8
1 category rests on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign 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.
Knowledge
Like-for-like- Claude Sonnet 5
- 66.6
- Supported · #20/183
- Mistral Medium 3.5 128B
- 40.5
- Supported · #132/183
- Basis
- BenchAlign lane · 6 vs 2 public rows
- Reading
- Claude Sonnet 5 leads
Coding
Directional only- Claude Sonnet 5
- 64.1
- Supported · #13/152
- Mistral Medium 3.5 128B
- 39.1
- Estimated · #121/152
- Basis
- BenchAlign lane · 11 vs 2 public rows
- Reading
- Directional only
Reasoning
Not comparable- Claude Sonnet 5
- 77.4
- Unranked · 2 rankable rows
- Mistral Medium 3.5 128B
- 68.6
- Unranked · 2 rankable rows
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Math
Not comparable- Claude Sonnet 5
- Not ranked
- Mistral Medium 3.5 128B
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- Claude Sonnet 5
- Not ranked
- Mistral Medium 3.5 128B
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Claude Sonnet 5
- 77.5
- #13/48
- Mistral Medium 3.5 128B
- 55.6
- Unranked · 1 rankable row
- Basis
- Provisional lane · 1 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- Claude Sonnet 5
- Not ranked
- Mistral Medium 3.5 128B
- 84.0
- #48/123
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
| Category | Claude Sonnet 5 | Mistral Medium 3.5 128B | Basis | Reading |
|---|---|---|---|---|
| Agentic | 65.9Supported · #11/153 | 22.2Supported · #151/153 | Like-for-likeBenchAlign lane · 7 vs 3 public rows | Claude Sonnet 5 leads |
| Knowledge | 66.6Supported · #20/183 | 40.5Supported · #132/183 | Like-for-likeBenchAlign lane · 6 vs 2 public rows | Claude Sonnet 5 leads |
| Coding | 64.1Supported · #13/152 | 39.1Estimated · #121/152 | Directional onlyBenchAlign lane · 11 vs 2 public rows | Directional only |
| Reasoning | 77.4Unranked · 2 rankable rows | 68.6Unranked · 2 rankable rows | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Math | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multimodal | 77.5#13/48 | 55.6Unranked · 1 rankable row | Not comparableProvisional lane · 1 vs 0 weighted rows | Not comparable |
| Instruction following | Not ranked | 84.0#48/123 | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign) differ from the provisional-lane categories. Unranked scores sit on the lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
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.
MMLU-Pro (Vals)
Knowledge
Claude Sonnet 5: 87.5%Mistral Medium 3.5 128B: 75.3%Normalized gap 12.2Claude Sonnet 5 source Mistral Medium 3.5 128B sourceSWE-bench Verified
Coding
Claude Sonnet 5: 85.2%Mistral Medium 3.5 128B: 77.6%Normalized gap 7.6Claude Sonnet 5 source Mistral Medium 3.5 128B source
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
- $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
- $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
- $0.18
- 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 has the lower modeled cost
Mistral Medium 3.5 128B has no published cached-input rate, so cached tokens use its listed input rate.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationClaude Sonnet 5Mistral Medium 3.5 128B
Context window
Maximum documented context; output-token limits may be lower.
Claude Sonnet 5
Mistral Medium 3.5 128B
256K
API model ID
Claude Sonnet 5
claude-sonnet-5
Anthropic model overviewMistral Medium 3.5 128B
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Claude Sonnet 5
$0.2 per 1M cached input tokens
Claude API pricingMistral Medium 3.5 128B
Not published
Documented inputs
Claude Sonnet 5
text, image
Anthropic model overviewMistral Medium 3.5 128B
Not sourced
Documented outputs
Claude Sonnet 5
Mistral Medium 3.5 128B
Not sourced
Provider availability
Claude Sonnet 5
Generally Available · Claude API
Anthropic model overviewMistral Medium 3.5 128B
Not sourced
Reasoning profile
Claude Sonnet 5
Reasoning
Mistral Medium 3.5 128B
Reasoning
Weight access
Claude Sonnet 5
Proprietary
Mistral Medium 3.5 128B
Open Weight
License
Claude Sonnet 5
Proprietary
Mistral Medium 3.5 128B
Open Weight
Release date
Claude Sonnet 5
2026-06-30
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 has the higher public score, 69.92 versus 42.45, and the 90% score intervals do not overlap.
- Workload cost
- Repository review: $0.13 vs $0.0975. Cache-heavy agent loop: $0.18 vs $0.405.
- Context tradeoff
- Claude Sonnet 5 has the larger documented window (1M).
Run the same representative tasks against both endpoints before changing production traffic.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence28 rows
Agentic
Terminal-Bench 3.0
Claude Sonnet 514.6%SourceMistral Medium 3.5 128B—Not directly comparable
Terminal-Bench 2.0
Claude Sonnet 580.4%SourceMistral Medium 3.5 128B—Not directly comparable
BrowseComp
Claude Sonnet 584.7%SourceMistral Medium 3.5 128B—Not directly comparable
HLE w/ tools
Claude Sonnet 557.4%SourceMistral Medium 3.5 128B—Not directly comparable
OSWorld-Verified
Claude Sonnet 581.2%SourceMistral Medium 3.5 128B—Not directly comparable
Terminal-Bench 2.1 (Vals)
Claude Sonnet 574.5%SourceMistral Medium 3.5 128B39.0%SourceClaude Sonnet 5 leads this result
ApprenticeBench
Claude Sonnet 516%SourceMistral Medium 3.5 128B—Not directly comparable
τ³-bench results
Claude Sonnet 5—Mistral Medium 3.5 128B91.4%SourceNot directly comparable
Gert Labs
Claude Sonnet 5—Mistral Medium 3.5 128B39.10%SourceNot directly comparable
Coding
SWE-bench Verified
Claude Sonnet 585.2%SourceMistral Medium 3.5 128B77.6%SourceClaude Sonnet 5 leads this result
SWE-bench Pro
Claude Sonnet 563.2%SourceMistral Medium 3.5 128B—Not directly comparable
SWE Multilingual
Claude Sonnet 578.3%SourceMistral Medium 3.5 128B—Not directly comparable
SWE Multimodal
Claude Sonnet 528.1%SourceMistral Medium 3.5 128B—Not directly comparable
Terminal-Bench 2.0
Claude Sonnet 580.4%SourceMistral Medium 3.5 128B—Not directly comparable
FrontierCode 1.1 Main
Claude Sonnet 542.7%SourceMistral Medium 3.5 128B—Not directly comparable
cursorBench32
Claude Sonnet 561.5%SourceMistral Medium 3.5 128B—Not directly comparable
VulcanBench CII v1
Claude Sonnet 589.2%SourceMistral Medium 3.5 128B—Not directly comparable
LiveCodeBench (Vals)
Claude Sonnet 582.4%SourceMistral Medium 3.5 128B—Not directly comparable
SWE-bench (Vals)
Claude Sonnet 579.6%SourceMistral Medium 3.5 128B66.4%SourceClaude Sonnet 5 leads this result
cursorBench40
Claude Sonnet 534.1%SourceMistral Medium 3.5 128B—Not directly comparable
Knowledge
HLE
Claude Sonnet 557.4%SourceMistral Medium 3.5 128B—Not directly comparable
HLE w/o tools
Claude Sonnet 543.2%SourceMistral Medium 3.5 128B—Not directly comparable
HLE-Verified
Claude Sonnet 531.0%SourceMistral Medium 3.5 128B—Not directly comparable
LABBench2
Claude Sonnet 580.1%SourceMistral Medium 3.5 128B—Not directly comparable
GPQA Diamond (Vals)
Claude Sonnet 588.9%SourceMistral Medium 3.5 128B34.8%SourceClaude Sonnet 5 leads this result
MMLU-Pro (Vals)
Claude Sonnet 587.5%SourceMistral Medium 3.5 128B75.3%SourceClaude Sonnet 5 leads this result
Multimodal
Frequently asked questions
Which is better, Claude Sonnet 5 or Mistral Medium 3.5 128B?
Claude Sonnet 5 has the higher public score, 69.92 versus 42.45, and the 90% score intervals do not overlap. That is the clearest overall quality signal in the current public data.
Which is better for coding, Claude Sonnet 5 or Mistral Medium 3.5 128B?
Claude Sonnet 5 scores higher for coding on the public lane, 64.1 to 39.1. 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 or Mistral Medium 3.5 128B?
Claude Sonnet 5 leads the public agentic tasks lane, 65.9 to 22.2, with Supported evidence for both models and non-overlapping 90% intervals.
Which costs less, Claude Sonnet 5 or Mistral Medium 3.5 128B?
For the stated presets, chat costs $0.007 on Claude Sonnet 5 and $0.00525 on Mistral Medium 3.5 128B; repository review costs $0.13 and $0.0975; the cache-heavy agent loop costs $0.18 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 or Mistral Medium 3.5 128B?
Claude Sonnet 5 has the larger documented context window: 1M, compared with 256K.
Related comparisons
Last updated September 14, 2026
Watch Claude Sonnet 5 vs Mistral Medium 3.5 128B
One weekly email when material rank, price, or benchmark evidence changes make this matchup worth revisiting.
Read a sample issueJoin 2,000+ readers.