ModelVerdict

Comparison

Claude Sonnet 5 vs Mistral Small 4

Same documents, same prompt: where each model is right, what it really costs and how fast it answers.

At a glance

Task · documentsEnglish (US)CzechGermanSpanishFrench
Invoice extraction99.8% / 95.6%100.0% / 93.6%99.0% / 94.6%93.6% / 91.9%98.7% / 94.2%
Email triage98.2% / 89.7%98.2% / 87.7%97.9% / 87.1%——
Personal data detection99.7% / 99.4%98.9% / 98.8%99.7% / 99.1%——
Contract clauses100.0% / 91.5%100.0% / 99.0%98.2% / 94.0%——

Correct fields: Claude Sonnet 5 / Mistral Small 4; the better one in bold. Click a cell to see the details.

Invoice extraction · English (US) (150 documents)

Claude Sonnet 5 is more accurate by 4.2 pp. Mistral Small 4 is 21.7× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields99.8%95.6%
Error-free documents99%58%
Per 1,000 documents$8.84$0.41
To fix / 1,00013420
Speed (median)3.2 sec1.8 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Supplier100.0%100.0%
Supplier ID (EIN, IČO…)100.0%99.3%
Invoice number100.0%100.0%
Payment reference100.0%87.3%
Invoice date100.0%97.3%
Due date100.0%98.7%
Net by tax rate98.7%72.0%
Tax by rate99.3%99.3%
Total100.0%100.0%
Currency100.0%99.3%
Bank account100.0%98.0%

Documents where they differ

Invoice extraction · Czech (150 documents)

Claude Sonnet 5 is more accurate by 6.4 pp. Mistral Small 4 is 21.5× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields100.0%93.6%
Error-free documents100%56%
Per 1,000 documents$9.41$0.44
To fix / 1,0000440
Speed (median)3.6 sec2.0 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Supplier100.0%91.3%
Supplier ID (EIN, IČO…)100.0%92.7%
VAT ID100.0%94.0%
Invoice number100.0%100.0%
Payment reference100.0%97.3%
Invoice date100.0%98.0%
Tax point100.0%76.0%
Due date100.0%97.3%
Net by tax rate100.0%90.0%
Tax by rate100.0%94.7%
Total100.0%98.7%
Currency100.0%97.3%
Bank account100.0%90.0%

Documents where they differ

Invoice extraction · German (150 documents)

Claude Sonnet 5 is more accurate by 4.3 pp. Mistral Small 4 is 23.9× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields99.0%94.6%
Error-free documents87%50%
Per 1,000 documents$10.42$0.44
To fix / 1,000133500
Speed (median)3.8 sec2.0 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Supplier100.0%98.6%
Supplier ID (EIN, IČO…)100.0%80.0%
VAT ID100.0%92.9%
Invoice number100.0%100.0%
Payment reference100.0%87.1%
Invoice date99.3%100.0%
Tax point100.0%87.9%
Due date100.0%98.6%
Net by tax rate89.3%94.3%
Tax by rate100.0%99.3%
Total100.0%100.0%
Currency100.0%100.0%
Bank account98.0%91.4%

Documents where they differ

Invoice extraction · Spanish (100 documents)

Claude Sonnet 5 is more accurate by 1.7 pp. Mistral Small 4 is 26.7× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields93.6%91.9%
Error-free documents77%31%
Per 1,000 documents$11.89$0.44
To fix / 1,000230691
Speed (median)4.0 sec2.2 sec
Valid answers95.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Supplier94.0%97.6%
Supplier ID (EIN, IČO…)95.0%98.8%
VAT ID95.0%53.6%
Invoice number95.0%100.0%
Payment reference94.0%88.1%
Invoice date95.0%100.0%
Tax point95.0%69.1%
Due date95.0%100.0%
Net by tax rate79.0%96.4%
Tax by rate95.0%97.6%
Total95.0%98.8%
Currency95.0%100.0%
Bank account95.0%95.2%

Documents where they differ

Invoice extraction · French (97 documents)

Claude Sonnet 5 is more accurate by 4.4 pp. Mistral Small 4 is 24.7× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields98.7%94.2%
Error-free documents96%50%
Per 1,000 documents$11.02$0.45
To fix / 1,00041500
Speed (median)4.4 sec2.1 sec
Valid answers99.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Supplier99.0%96.1%
Supplier ID (EIN, IČO…)99.0%93.4%
VAT ID99.0%93.4%
Invoice number99.0%100.0%
Payment reference97.9%85.5%
Invoice date99.0%100.0%
Tax point99.0%92.1%
Due date99.0%100.0%
Net by tax rate96.9%94.7%
Tax by rate99.0%100.0%
Total99.0%100.0%
Currency99.0%94.7%
Bank account97.9%75.0%

Documents where they differ

Email triage · English (US) (150 documents)

Claude Sonnet 5 is more accurate by 8.5 pp. Mistral Small 4 is 42.2× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields98.2%89.7%
Error-free documents84%37%
Per 1,000 documents$4.01$0.09
To fix / 1,000160627
Speed (median)3.8 sec0.8 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Category100.0%100.0%
Priority97.3%61.3%
Sentiment86.7%71.3%
Customer name100.0%100.0%
Order number100.0%100.0%
Invoice number100.0%100.0%
Amount100.0%99.3%
Currency100.0%99.3%
Deadline100.0%76.0%

Documents where they differ

  • Robert Lewis · Email · Claude Sonnet 5 9/9, Mistral Small 4 6/9
  • Omar Cabrera · Email · Claude Sonnet 5 9/9, Mistral Small 4 7/9
  • Russell Bates · Email · Claude Sonnet 5 9/9, Mistral Small 4 7/9
  • Kyle Schwartz · Email · Claude Sonnet 5 9/9, Mistral Small 4 7/9
  • Jennifer Chapman · Email · Claude Sonnet 5 9/9, Mistral Small 4 7/9
  • Cody Baldwin · Email · Claude Sonnet 5 9/9, Mistral Small 4 7/9
  • Dale Sanchez · Email · Claude Sonnet 5 9/9, Mistral Small 4 7/9
  • Leah Douglas · Email · Claude Sonnet 5 9/9, Mistral Small 4 7/9

Email triage · Czech (150 documents)

Claude Sonnet 5 is more accurate by 10.5 pp. Mistral Small 4 is 41.7× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields98.2%87.7%
Error-free documents83%32%
Per 1,000 documents$4.91$0.12
To fix / 1,000167685
Speed (median)4.7 sec0.8 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Category100.0%100.0%
Priority96.0%52.4%
Sentiment87.3%72.5%
Customer name100.0%98.7%
Order number100.0%100.0%
Invoice number100.0%100.0%
Amount100.0%98.0%
Currency100.0%98.0%
Deadline100.0%69.8%

Documents where they differ

Email triage · German (150 documents)

Claude Sonnet 5 is more accurate by 10.8 pp. Mistral Small 4 is 47.9× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields97.9%87.1%
Error-free documents81%29%
Per 1,000 documents$5.11$0.11
To fix / 1,000187706
Speed (median)4.3 sec0.8 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Category100.0%100.0%
Priority96.0%55.2%
Sentiment84.7%65.0%
Customer name100.0%100.0%
Order number100.0%100.0%
Invoice number100.0%100.0%
Amount100.0%96.5%
Currency100.0%96.5%
Deadline100.0%70.6%

Documents where they differ

Personal data detection · English (US) (150 documents)

Claude Sonnet 5 is more accurate by 0.3 pp. Mistral Small 4 is 45.3× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields99.7%99.4%
Error-free documents98%96%
Per 1,000 documents$3.50$0.08
To fix / 1,0002040
Speed (median)2.5 sec0.8 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Names100.0%97.3%
Email addresses100.0%100.0%
Phone numbers100.0%100.0%
Addresses98.0%98.7%
Dates of birth100.0%100.0%
National IDs100.0%100.0%
Bank accounts100.0%100.0%

Documents where they differ

Personal data detection · Czech (150 documents)

Claude Sonnet 5 is more accurate by 0.1 pp. Mistral Small 4 is 43.8× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields98.9%98.8%
Error-free documents92%92%
Per 1,000 documents$4.06$0.09
To fix / 1,0008081
Speed (median)3.2 sec0.9 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Names96.7%94.0%
Email addresses100.0%100.0%
Phone numbers100.0%100.0%
Addresses97.3%98.7%
Dates of birth98.0%98.7%
National IDs100.0%100.0%
Bank accounts100.0%100.0%

Documents where they differ

Personal data detection · German (150 documents)

Claude Sonnet 5 is more accurate by 0.6 pp. Mistral Small 4 is 49× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields99.7%99.1%
Error-free documents98%94%
Per 1,000 documents$4.40$0.09
To fix / 1,0002065
Speed (median)3.7 sec0.9 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Names98.7%95.0%
Email addresses100.0%100.0%
Phone numbers100.0%100.0%
Addresses100.0%99.3%
Dates of birth99.3%100.0%
National IDs100.0%100.0%
Bank accounts100.0%99.3%

Documents where they differ

  • Rosi Karz · Text · Claude Sonnet 5 7/7, Mistral Small 4 6/7

Contract clauses · English (US) (150 documents)

Claude Sonnet 5 is more accurate by 8.5 pp. Mistral Small 4 is 29.6× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields100.0%91.5%
Error-free documents100%43%
Per 1,000 documents$5.04$0.17
To fix / 1,0000567
Speed (median)3.4 sec1.1 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Provider100.0%43.3%
Provider ID100.0%100.0%
Client100.0%46.7%
Client ID100.0%100.0%
Contract type100.0%100.0%
Price (net)100.0%100.0%
Currency100.0%100.0%
Billing period100.0%100.0%
Effective date100.0%100.0%
End date100.0%100.0%
Notice period (months)100.0%100.0%
Late-payment penalty (% per day)100.0%100.0%
Governing law100.0%100.0%

Documents where they differ

Contract clauses · Czech (150 documents)

Claude Sonnet 5 is more accurate by 1 pp. Mistral Small 4 is 26.7× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields100.0%99.0%
Error-free documents100%92%
Per 1,000 documents$6.05$0.23
To fix / 1,000080
Speed (median)3.6 sec1.2 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Provider100.0%95.3%
Provider ID100.0%100.0%
Client100.0%95.3%
Client ID100.0%100.0%
Contract type100.0%100.0%
Price (net)100.0%100.0%
Currency100.0%100.0%
Billing period100.0%100.0%
Effective date100.0%96.7%
End date100.0%100.0%
Notice period (months)100.0%100.0%
Late-payment penalty (% per day)100.0%100.0%
Governing law100.0%100.0%

Documents where they differ

Contract clauses · German (150 documents)

Claude Sonnet 5 is more accurate by 4.2 pp. Mistral Small 4 is 34.5× cheaper.

MetricClaude Sonnet 5Mistral Small 4
Correct fields98.2%94.0%
Error-free documents87%45%
Per 1,000 documents$7.11$0.21
To fix / 1,000133553
Speed (median)4.3 sec1.2 sec
Valid answers100.0%100.0%

Accuracy per field

FieldClaude Sonnet 5Mistral Small 4
Provider100.0%98.6%
Provider ID87.3%62.4%
Client100.0%98.6%
Client ID89.3%63.1%
Contract type100.0%100.0%
Price (net)100.0%100.0%
Currency100.0%100.0%
Billing period100.0%100.0%
Effective date100.0%99.3%
End date100.0%100.0%
Notice period (months)100.0%100.0%
Late-payment penalty (% per day)100.0%100.0%
Governing law100.0%100.0%

Documents where they differ