Data points: 123
Model compare
The readout for DeepSeek V4 Pro and GPT-5.1, before the detailed comparison sheet.
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.1
GPT-5.1 has the higher weighted result; Model A / B score 41.3 to 58.7.
Evidence depth
123 data points
Includes 29 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 38 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 GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | DeepSeek V4 Pro | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 41.3 pts | 58.7 pts |
| Benchmark category leads | 2 categories | 3 categories |
| Operational advantages | Cheapest input price, Provider coverage | Average speed, First-token latency, Free providers |
| Context window | 1.0M tokens | 400K tokens |
| Max output | 384K tokens | 128K tokens |
| Modalities | Input Text Output Text | Input Image |
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 | GPT-5.1 |
|---|---|---|
| Developer | DeepSeek | OpenAI |
| Released | Apr 2026 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | DeepSeek | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | deepseek/deepseek-v4-pro | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for DeepSeek V4 Pro and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
DeepSeek V4 Pro
DeepSeek V4 Pro is stronger in benchmark categories (Agents, Reasoning) and operational dimensions (Cheapest input price, Provider coverage).
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Knowledge, Math, Instruction following) and operational dimensions (Average speed, First-token latency, 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
GPT-5.1
52.1
DeepSeek V4 Pro leads by 4.4
Tied
DeepSeek V4 Pro leads by 1.0
GPT-5.1 leads by 10.2
GPT-5.1 leads by 18.1
No data
No data
GPT-5.1 leads by 0.6
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
GPT-5.1
56.0
Rank #44/83 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner0.99 s
Rank #55/136 · confidence 4
GPT-5.1
35.90 s
Rank #128/136 · confidence 4
DeepSeek V4 Pro
68.6 tok/s
Rank #91/136 · confidence 4
GPT-5.1
winner111.6 tok/s
Rank #60/136 · confidence 4
DeepSeek V4 Pro
winner30.02 s
Rank #102/136 · confidence 4
GPT-5.1
35.90 s
Rank #113/136 · confidence 4
DeepSeek V4 Pro
winner$0.870/M
Rank #34/162 · confidence 4
GPT-5.1
$10.00/M
Rank #121/162 · confidence 4
DeepSeek V4 Pro
winner$0.544/M
Rank #47/162 · confidence 4
GPT-5.1
$3.44/M
Rank #118/162 · confidence 4
DeepSeek V4 Pro
winner$0.435/M
Rank #66/162 · confidence 4
GPT-5.1
$1.25/M
Rank #108/162 · confidence 4
DeepSeek V4 Pro
66.3
Rank #38/89 · confidence 2 · eval date 2026-04-24
GPT-5.1
winner75.0
Rank #3/89 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner87.5%
Rank #9/125 · confidence 2 · eval date 2026-04-24
GPT-5.1
87.0%
Rank #12/125 · confidence 4
DeepSeek V4 Pro
winner12.9
Rank #17/73 · confidence 2 · eval date 2026-04-24
GPT-5.1
4.9
Rank #34/73 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner90.5%
Rank #17/187 · confidence 4
GPT-5.1
87.3%
Rank #32/187 · confidence 4
DeepSeek V4 Pro
winner33.5%
Rank #23/186 · confidence 4
GPT-5.1
26.5%
Rank #39/186 · confidence 4
DeepSeek V4 Pro
winner49.9
Rank #8/33 · confidence 2 · eval date 2026-04-24
GPT-5.1
24.6
Rank #18/33 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner59.4
Rank #18/58 · confidence 2 · eval date 2026-04-24
GPT-5.1
49.4
Rank #32/58 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner50.0
Rank #22/96 · confidence 2 · eval date 2026-04-24
GPT-5.1
43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner46.4%
Rank #30/184 · confidence 4
GPT-5.1
43.3%
Rank #41/184 · confidence 4
DeepSeek V4 Pro
winner82.0
Rank #4/56 · confidence 2 · eval date 2026-04-24
GPT-5.1
49.9
Rank #30/56 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner94.0
Rank #4/90 · confidence 2 · eval date 2026-04-24
GPT-5.1
51.3
Rank #66/90 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner44.3
Rank #16/99 · confidence 2 · eval date 2026-04-24
GPT-5.1
36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner43.3
Rank #18/90 · confidence 2 · eval date 2026-04-24
GPT-5.1
37.6
Rank #31/90 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner35.9
Rank #19/96 · confidence 2 · eval date 2026-04-24
GPT-5.1
26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner88.8
Rank #29/96 · confidence 2 · eval date 2026-04-24
GPT-5.1
87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner1267.0
Rank #26/65 · confidence 2 · eval date 2026-04-24
GPT-5.1
1220.0
Rank #37/65 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner76.5
Rank #12/86 · confidence 2 · eval date 2026-04-24
GPT-5.1
72.9
Rank #30/86 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner96.2
Rank #10/84 · confidence 2 · eval date 2026-04-24
GPT-5.1
81.9
Rank #52/84 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner36.4
Rank #13/54 · confidence 2 · eval date 2026-04-24
GPT-5.1
21.0
Rank #36/54 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner1307.0
Rank #14/54 · confidence 2 · eval date 2026-04-24
GPT-5.1
987.0
Rank #35/54 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner40.4
Rank #14/50 · confidence 2 · eval date 2026-04-24
GPT-5.1
24.4
Rank #35/50 · confidence 1 · eval date 2025-11-13
DeepSeek V4 Pro
winner50.3
Rank #23/50 · confidence 2 · eval date 2026-04-24
GPT-5.1
41.2
Rank #35/50 · confidence 1 · eval date 2025-11-13
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | DeepSeek V4 Pro | GPT-5.1 |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | DeepSeek V4 Pro | GPT-5.1 |
|---|---|---|
10 tests | DeepSeek V4 Pro speed / latency 27 tok/s / 51460ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
10 tests | DeepSeek V4 Pro speed / latency 28 tok/s / 6536ms input / output No data | GPT-5.1 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 | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | DeepSeek V4 Pro speed / latency 38 tok/s / 6365ms input / output No data | GPT-5.1 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 | GPT-5.1 speed / latency N/A / N/A input / output No data |
DeepSeek V4 Pro deepseek-v4-pro speed / latency No data input / output $0/M/$0/M | GPT-5.1 gpt-5.1 speed / latency No data input / output $0.086/M | |
DeepSeek V4 Pro deepseek-v4-pro speed / latency No data input / output $0/request | GPT-5.1 gpt-5.1 speed / latency No data input / output $0/request | |
DeepSeek V4 Pro deepseek-ai/deepseek-v4-pro speed / latency No data input / output $0/request | GPT-5.1 gpt-5-1 speed / latency No data input / output $0.040/request | |
DeepSeek V4 Pro deepseek-v4-pro speed / latency No data input / output $0.0049/request | GPT-5.1 gpt-5.1 speed / latency No data input / output $0.103/M |
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
