Data points: 143
Model compare
The readout for DeepSeek V4 Pro and Step 3.7 Flash, before the detailed comparison sheet.
Weighted outcome: DeepSeek V4 Pro. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
DeepSeek V4 Pro
DeepSeek V4 Pro has the higher weighted result; Model A / B score 58 to 42.
Evidence depth
143 data points
Includes 36 benchmark rows, 1 audit samples, and 6 provider examples.
Selection signal
Start with DeepSeek V4 Pro
The charts below split 43 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
This report only uses LMSpeed data for DeepSeek V4 Pro and Step 3.7 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | DeepSeek V4 Pro | Step 3.7 Flash |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 58.0 pts | 42.0 pts |
| Benchmark category leads | 3 categories | 2 categories |
| Operational advantages | First-token latency, Provider coverage | Average speed, Free providers |
| Context window | 1.0M tokens | 256K tokens |
| Max output | 384K tokens | 256K tokens |
| Modalities | Input Text Output Text | Input Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | DeepSeek V4 Pro | Step 3.7 Flash |
|---|---|---|
| Developer | DeepSeek | StepFun |
| Released | Apr 2026 | May 2026 |
| Parameters | No data | No data |
| Tokenizer | DeepSeek | Other |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | deepseek/deepseek-v4-pro | stepfun/step-3.7-flash |
| References | No data | No data |
This report only uses LMSpeed data for DeepSeek V4 Pro and Step 3.7 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
DeepSeek V4 Pro
DeepSeek V4 Pro is stronger in benchmark categories (Reasoning, Knowledge, Instruction following) and operational dimensions (First-token latency, Provider coverage).
Step 3.7 Flash
Step 3.7 Flash is stronger in benchmark categories (Agents, Coding) and operational dimensions (Average speed, Free providers).
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
DeepSeek V4 Pro
48.2
Avg. score
Step 3.7 Flash
52
Step 3.7 Flash leads by 2.0
Step 3.7 Flash leads by 0.3
DeepSeek V4 Pro leads by 0.5
DeepSeek V4 Pro leads by 1.0
DeepSeek V4 Pro
No data
Step 3.7 Flash
DeepSeek V4 Pro leads by 1.4
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
DeepSeek V4 Pro
winner67.0
Rank #19/83 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
53.0
Rank #51/83 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
68.6 tok/s
Rank #91/136 · confidence 4
Step 3.7 Flash
winner400.3 tok/s
Rank #2/136 · confidence 4
DeepSeek V4 Pro
0.99 s
Rank #55/136 · confidence 4
Step 3.7 Flash
winner0.73 s
Rank #35/136 · confidence 4
DeepSeek V4 Pro
30.02 s
Rank #102/136 · confidence 4
Step 3.7 Flash
winner5.72 s
Rank #64/136 · confidence 4
DeepSeek V4 Pro
$0.435/M
Rank #66/162 · confidence 4
Step 3.7 Flash
winner$0.200/M
Rank #27/162 · confidence 4
DeepSeek V4 Pro
$0.544/M
Rank #47/162 · confidence 4
Step 3.7 Flash
winner$0.438/M
Rank #34/162 · confidence 4
DeepSeek V4 Pro
winner$0.870/M
Rank #34/162 · confidence 4
Step 3.7 Flash
$1.15/M
Rank #42/162 · confidence 4
DeepSeek V4 Pro
winner12.9
Rank #17/73 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
2.3
Rank #45/73 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner90.5%
Rank #17/187 · confidence 4
Step 3.7 Flash
80.9%
Rank #73/187 · confidence 4
DeepSeek V4 Pro
winner33.5%
Rank #23/186 · confidence 4
Step 3.7 Flash
19.9%
Rank #57/186 · confidence 4
DeepSeek V4 Pro
winner66.3
Rank #38/89 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
63.7
Rank #50/89 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner67.9
Rank #15/26 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
59.5
Rank #20/26 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner59.4
Rank #18/58 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
39.6
Rank #40/58 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner50.0
Rank #22/96 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
40.0
Rank #58/96 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
55.4
Rank #26/37 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
winner56.3
Rank #22/37 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner46.4%
Rank #30/184 · confidence 4
Step 3.7 Flash
40.0%
Rank #68/184 · confidence 4
DeepSeek V4 Pro
winner56.3
Rank #37/64 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
41.5
Rank #56/64 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner94.0
Rank #4/90 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
84.4
Rank #28/90 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner44.3
Rank #16/99 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
30.3
Rank #58/99 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner43.3
Rank #18/90 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
25.4
Rank #54/90 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner35.9
Rank #19/96 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
19.9
Rank #53/96 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner88.8
Rank #29/96 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
80.9
Rank #61/96 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner1267.0
Rank #26/65 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
1214.0
Rank #40/65 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner76.5
Rank #12/86 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
67.3
Rank #46/86 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
96.2
Rank #10/84 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
winner98.5
Rank #2/84 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner48.2
Rank #3/5 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
47.2
Rank #4/5 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
59.8
Rank #14/28 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
winner67.1
Rank #6/28 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner51.8
Rank #8/21 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
49.5
Rank #10/21 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner24.3
Rank #10/21 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
14.8
Rank #14/21 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner83.4
Rank #10/24 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
75.8
Rank #15/24 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner36.4
Rank #13/54 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
21.5
Rank #33/54 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner1307.0
Rank #14/54 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
1017.0
Rank #33/54 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner40.4
Rank #14/50 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
25.9
Rank #33/50 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner67.3
Rank #17/52 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
51.7
Rank #32/52 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
winner67.9
Rank #17/45 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
59.5
Rank #26/45 · confidence 1 · eval date 2026-05-29
DeepSeek V4 Pro
50.3
Rank #23/50 · confidence 2 · eval date 2026-04-24
Step 3.7 Flash
winner51.6
Rank #20/50 · confidence 1 · eval date 2026-05-29
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | DeepSeek V4 Pro | Step 3.7 Flash |
|---|---|---|
Winner: DeepSeek V4 Pro | DeepSeek V4 Pro deepseek-v4-pro Audit score 87 788486100 | Step 3.7 Flash step-3.7-flash No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | DeepSeek V4 Pro | Step 3.7 Flash |
|---|---|---|
55 tests | DeepSeek V4 Pro speed / latency 21 tok/s / 1345ms input / output No data | Step 3.7 Flash speed / latency 119 tok/s / 15574ms input / output No data |
10 tests | DeepSeek V4 Pro speed / latency 27 tok/s / 51460ms input / output No data | Step 3.7 Flash speed / latency N/A / N/A input / output No data |
10 tests | DeepSeek V4 Pro speed / latency 41 tok/s / 5113ms input / output No data | Step 3.7 Flash speed / latency N/A / N/A input / output No data |
5 tests | DeepSeek V4 Pro speed / latency 40 tok/s / 5191ms input / output No data | Step 3.7 Flash speed / latency N/A / N/A input / output No data |
5 tests | DeepSeek V4 Pro speed / latency 36 tok/s / 12133ms input / output No data | Step 3.7 Flash speed / latency N/A / N/A input / output No data |
DeepSeek V4 Pro deepseek-v4-pro speed / latency No data input / output $0.167/M/$0.334/M | Step 3.7 Flash step-3.7-flash speed / latency No data input / output $0/M |
Weighted outcome: DeepSeek V4 Pro. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
