ModelVerdict

Comparison

DeepSeek V4.1 Flash vs Qwen3.8 Flash

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 extraction99.4% / 82.4%99.9% / 91.8%99.5% / 93.5%98.3% / 87.9%99.4% / 90.6%
Email triage97.6% / 97.5%97.4% / 98.5%96.3% / 97.9%——
Personal data detection99.6% / 99.2%99.7% / 97.0%99.8% / 99.6%——
Contract clauses100.0% / 95.1%100.0% / 99.9%97.2% / 98.0%——

Correct fields: DeepSeek V4.1 Flash / Qwen3.8 Flash; the better one in bold. Click a cell to see the details.

Invoice extraction · English (US) (150 documents)

DeepSeek V4.1 Flash is more accurate by 17 pp. DeepSeek V4.1 Flash is 2.2× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields99.4%82.4%
Error-free documents93%57%
Per 1,000 documents$0.52$1.15
To fix / 1,00067427
Speed (median)5.7 sec17.4 sec
Valid answers100.0%90.7%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Supplier100.0%85.3%
Supplier ID (EIN, IČO…)100.0%88.7%
Invoice number100.0%85.3%
Payment reference96.7%79.3%
Invoice date100.0%85.3%
Due date100.0%85.3%
Net by tax rate100.0%70.0%
Tax by rate100.0%76.0%
Total100.0%85.3%
Currency99.3%84.0%
Bank account97.3%81.3%

Documents where they differ

Invoice extraction · Czech (150 documents)

DeepSeek V4.1 Flash is more accurate by 8.1 pp. DeepSeek V4.1 Flash is 2.1× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields99.9%91.8%
Error-free documents99%77%
Per 1,000 documents$0.50$1.02
To fix / 1,00013233
Speed (median)5.0 sec17.0 sec
Valid answers100.0%96.7%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Supplier99.3%93.3%
Supplier ID (EIN, IČO…)100.0%94.0%
VAT ID100.0%94.0%
Invoice number100.0%94.7%
Payment reference100.0%94.0%
Invoice date100.0%94.7%
Tax point100.0%94.7%
Due date100.0%94.7%
Net by tax rate100.0%80.0%
Tax by rate100.0%80.7%
Total100.0%94.0%
Currency100.0%94.0%
Bank account99.3%90.7%

Documents where they differ

Invoice extraction · German (150 documents)

DeepSeek V4.1 Flash is more accurate by 6.1 pp. DeepSeek V4.1 Flash is 2× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields99.5%93.5%
Error-free documents94%87%
Per 1,000 documents$0.57$1.12
To fix / 1,00060127
Speed (median)6.4 sec19.0 sec
Valid answers100.0%94.0%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Supplier99.3%94.0%
Supplier ID (EIN, IČO…)98.7%94.0%
VAT ID99.3%94.0%
Invoice number100.0%92.7%
Payment reference100.0%88.7%
Invoice date100.0%94.0%
Tax point99.3%94.0%
Due date99.3%94.0%
Net by tax rate100.0%94.0%
Tax by rate100.0%94.0%
Total100.0%94.0%
Currency100.0%94.0%
Bank account98.0%94.0%

Documents where they differ

Invoice extraction · Spanish (79 documents)

DeepSeek V4.1 Flash is more accurate by 10.3 pp. DeepSeek V4.1 Flash is 2× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields98.3%87.9%
Error-free documents77%74%
Per 1,000 documents$0.71$1.40
To fix / 1,000228260
Speed (median)5.8 sec22.3 sec
Valid answers100.0%90.0%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Supplier93.7%86.0%
Supplier ID (EIN, IČO…)100.0%89.0%
VAT ID100.0%86.0%
Invoice number100.0%89.0%
Payment reference97.5%85.0%
Invoice date100.0%89.0%
Tax point98.7%87.0%
Due date100.0%89.0%
Net by tax rate88.6%86.0%
Tax by rate100.0%90.0%
Total100.0%89.0%
Currency100.0%89.0%
Bank account98.7%89.0%

Documents where they differ

Invoice extraction · French (74 documents)

DeepSeek V4.1 Flash is more accurate by 8.8 pp. DeepSeek V4.1 Flash is 1.9× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields99.4%90.6%
Error-free documents92%82%
Per 1,000 documents$0.65$1.23
To fix / 1,00081180
Speed (median)5.7 sec19.8 sec
Valid answers100.0%95.0%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Supplier100.0%91.0%
Supplier ID (EIN, IČO…)100.0%91.0%
VAT ID98.7%91.0%
Invoice number100.0%90.0%
Payment reference98.7%86.0%
Invoice date100.0%91.0%
Tax point100.0%92.0%
Due date100.0%89.0%
Net by tax rate100.0%91.0%
Tax by rate100.0%94.0%
Total100.0%91.0%
Currency100.0%91.0%
Bank account94.6%90.0%

Documents where they differ

Email triage · English (US) (150 documents)

DeepSeek V4.1 Flash is more accurate by 0.1 pp. DeepSeek V4.1 Flash is 1.3× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields97.6%97.5%
Error-free documents79%79%
Per 1,000 documents$0.23$0.30
To fix / 1,000213213
Speed (median)3.8 sec8.9 sec
Valid answers100.0%100.0%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Category100.0%100.0%
Priority96.7%97.3%
Sentiment82.0%80.7%
Customer name100.0%100.0%
Order number100.0%100.0%
Invoice number100.0%100.0%
Amount100.0%100.0%
Currency100.0%100.0%
Deadline100.0%99.3%

Documents where they differ

  • Russell Bates · Email · DeepSeek V4.1 Flash 8/9, Qwen3.8 Flash 9/9
  • Jane Rubio · Email · DeepSeek V4.1 Flash 9/9, Qwen3.8 Flash 8/9
  • Laurie Knight · Email · DeepSeek V4.1 Flash 9/9, Qwen3.8 Flash 8/9
  • Allison Floyd · Email · DeepSeek V4.1 Flash 9/9, Qwen3.8 Flash 8/9
  • Sandra Hogan · Email · DeepSeek V4.1 Flash 9/9, Qwen3.8 Flash 8/9
  • Robert Lewis · Email · DeepSeek V4.1 Flash 8/9, Qwen3.8 Flash 9/9
  • Angela Harmon · Email · DeepSeek V4.1 Flash 8/9, Qwen3.8 Flash 7/9
  • Joseph Jackson · Email · DeepSeek V4.1 Flash 9/9, Qwen3.8 Flash 8/9

Email triage · Czech (150 documents)

Qwen3.8 Flash is more accurate by 1.1 pp. DeepSeek V4.1 Flash is 1.5× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields97.4%98.5%
Error-free documents77%87%
Per 1,000 documents$0.30$0.45
To fix / 1,000227133
Speed (median)4.2 sec13.0 sec
Valid answers100.0%100.0%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Category100.0%100.0%
Priority98.7%99.3%
Sentiment78.0%88.7%
Customer name100.0%99.3%
Order number100.0%99.3%
Invoice number100.0%100.0%
Amount100.0%100.0%
Currency100.0%100.0%
Deadline100.0%100.0%

Documents where they differ

Email triage · German (145 documents)

Qwen3.8 Flash is more accurate by 1.5 pp. DeepSeek V4.1 Flash is 1.3× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields96.3%97.9%
Error-free documents68%81%
Per 1,000 documents$0.30$0.39
To fix / 1,000324187
Speed (median)4.2 sec12.1 sec
Valid answers100.0%100.0%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Category100.0%100.0%
Priority97.2%96.0%
Sentiment69.7%84.7%
Customer name100.0%100.0%
Order number100.0%100.0%
Invoice number100.0%100.0%
Amount100.0%100.0%
Currency100.0%100.0%
Deadline100.0%100.0%

Documents where they differ

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

DeepSeek V4.1 Flash is more accurate by 0.4 pp.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields99.6%99.2%
Error-free documents97%99%
Per 1,000 documents$0.29$0.28
To fix / 1,0002713
Speed (median)3.8 sec7.5 sec
Valid answers100.0%100.0%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Names98.7%99.3%
Email addresses100.0%99.3%
Phone numbers100.0%99.3%
Addresses98.7%98.7%
Dates of birth100.0%99.3%
National IDs100.0%99.3%
Bank accounts100.0%99.3%

Documents where they differ

Personal data detection · Czech (150 documents)

DeepSeek V4.1 Flash is more accurate by 2.8 pp. DeepSeek V4.1 Flash is 1.3× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields99.7%97.0%
Error-free documents98%89%
Per 1,000 documents$0.31$0.41
To fix / 1,00020113
Speed (median)4.2 sec9.6 sec
Valid answers100.0%99.3%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Names100.0%90.7%
Email addresses100.0%98.0%
Phone numbers100.0%97.3%
Addresses98.0%96.7%
Dates of birth100.0%98.0%
National IDs100.0%99.3%
Bank accounts100.0%98.7%

Documents where they differ

Personal data detection · German (148 documents)

DeepSeek V4.1 Flash is more accurate by 0.2 pp. DeepSeek V4.1 Flash is 1.2× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields99.8%99.6%
Error-free documents99%99%
Per 1,000 documents$0.31$0.36
To fix / 1,000137
Speed (median)3.7 sec12.2 sec
Valid answers100.0%100.0%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Names100.0%99.3%
Email addresses100.0%99.3%
Phone numbers100.0%99.3%
Addresses98.7%99.3%
Dates of birth100.0%100.0%
National IDs100.0%100.0%
Bank accounts100.0%100.0%

Documents where they differ

Contract clauses · English (US) (150 documents)

DeepSeek V4.1 Flash is more accurate by 4.9 pp. DeepSeek V4.1 Flash is 1.9× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields100.0%95.1%
Error-free documents100%69%
Per 1,000 documents$0.32$0.62
To fix / 1,0000307
Speed (median)3.9 sec14.1 sec
Valid answers100.0%100.0%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Provider100.0%69.3%
Provider ID100.0%100.0%
Client100.0%69.3%
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%99.3%
End date100.0%100.0%
Notice period (months)100.0%100.0%
Late-payment penalty (% per day)100.0%99.3%
Governing law100.0%99.3%

Documents where they differ

Contract clauses · Czech (150 documents)

DeepSeek V4.1 Flash is more accurate by 0.1 pp. DeepSeek V4.1 Flash is 1.5× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields100.0%99.9%
Error-free documents100%99%
Per 1,000 documents$0.42$0.63
To fix / 1,000013
Speed (median)4.3 sec13.6 sec
Valid answers100.0%100.0%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Provider100.0%100.0%
Provider ID100.0%100.0%
Client100.0%100.0%
Client ID100.0%100.0%
Contract type100.0%98.7%
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 · German (145 documents)

Qwen3.8 Flash is more accurate by 0.8 pp. DeepSeek V4.1 Flash is 1.5× cheaper.

MetricDeepSeek V4.1 FlashQwen3.8 Flash
Correct fields97.2%98.0%
Error-free documents77%87%
Per 1,000 documents$0.51$0.78
To fix / 1,000228127
Speed (median)4.6 sec19.7 sec
Valid answers100.0%99.3%

Accuracy per field

FieldDeepSeek V4.1 FlashQwen3.8 Flash
Provider100.0%99.3%
Provider ID81.4%94.7%
Client100.0%99.3%
Client ID82.8%94.7%
Contract type100.0%99.3%
Price (net)100.0%99.3%
Currency100.0%99.3%
Billing period100.0%99.3%
Effective date100.0%99.3%
End date100.0%99.3%
Notice period (months)100.0%99.3%
Late-payment penalty (% per day)100.0%99.3%
Governing law100.0%91.3%

Documents where they differ