Data points: 94
Model compare
The readout for DeepSeek V3.1 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 17.3 to 82.7.
Evidence depth
94 data points
Includes 19 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 27 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 V3.1 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | DeepSeek V3.1 | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 17.3 pts | 82.7 pts |
| Benchmark category leads | 1 categories | 5 categories |
| Operational advantages | First-token latency | Cheapest input price, Average speed, Free providers, Provider coverage |
| Context window | No data | 400K tokens |
| Max output | No data | 128K tokens |
| Modalities | No data | Input ImageTextFile Output 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 V3.1 | GPT-5.1 |
|---|---|---|
| Developer | DeepSeek | OpenAI |
| Released | No data | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | No data | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | No data | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for DeepSeek V3.1 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
DeepSeek V3.1
DeepSeek V3.1 is stronger in benchmark categories (Coding) and operational dimensions (First-token latency).
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Agents, Reasoning, Knowledge, Math, Instruction following) and operational dimensions (Cheapest input price, Average speed, Free providers, Provider coverage).
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 V3.1
47.1
Avg. score
GPT-5.1
52
GPT-5.1 leads by 7.0
DeepSeek V3.1 leads by 5.2
GPT-5.1 leads by 2.8
GPT-5.1 leads by 11.9
GPT-5.1 leads by 1.3
No data
No data
GPT-5.1 leads by 11.2
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
DeepSeek V3.1
winner$1.68/M
Rank #58/162 · confidence 4
GPT-5.1
$10.00/M
Rank #120/162 · confidence 4
DeepSeek V3.1
winner$0.840/M
Rank #66/162 · confidence 4
GPT-5.1
$3.44/M
Rank #117/162 · confidence 4
DeepSeek V3.1
winner$0.560/M
Rank #78/162 · confidence 4
GPT-5.1
$1.25/M
Rank #107/162 · confidence 4
DeepSeek V3.1
53.3
Rank #65/89 · confidence 1 · eval date 2025-08-21
GPT-5.1
winner75.0
Rank #3/89 · confidence 1 · eval date 2025-11-13
DeepSeek V3.1
83.3%
Rank #39/125 · confidence 4
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
DeepSeek V3.1
73.5%
Rank #105/188 · confidence 4
GPT-5.1
winner87.3%
Rank #33/188 · confidence 4
DeepSeek V3.1
2.0
Rank #46/73 · confidence 1 · eval date 2025-08-21
GPT-5.1
winner4.9
Rank #34/73 · confidence 1 · eval date 2025-11-13
DeepSeek V3.1
6.3%
Rank #122/187 · confidence 4
GPT-5.1
winner26.5%
Rank #40/187 · confidence 4
DeepSeek V3.1
57.7%
Rank #46/115 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
DeepSeek V3.1
36.7%
Rank #98/185 · confidence 4
GPT-5.1
winner43.3%
Rank #42/185 · confidence 4
DeepSeek V3.1
39.1
Rank #63/96 · confidence 1 · eval date 2025-08-21
GPT-5.1
winner43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
DeepSeek V3.1
28.8
Rank #47/90 · confidence 1 · eval date 2025-08-21
GPT-5.1
winner37.6
Rank #31/90 · confidence 1 · eval date 2025-11-13
DeepSeek V3.1
77.9
Rank #65/96 · confidence 1 · eval date 2025-08-21
GPT-5.1
winner87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
DeepSeek V3.1
winner80.3
Rank #37/90 · confidence 1 · eval date 2025-08-21
GPT-5.1
51.3
Rank #65/90 · confidence 1 · eval date 2025-11-13
DeepSeek V3.1
13.0
Rank #64/96 · confidence 1 · eval date 2025-08-21
GPT-5.1
winner26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
DeepSeek V3.1
20.7
Rank #72/99 · confidence 1 · eval date 2025-08-21
GPT-5.1
winner36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
DeepSeek V3.1
1152.0
Rank #51/66 · confidence 1 · eval date 2025-08-21
GPT-5.1
winner1217.0
Rank #39/66 · confidence 1 · eval date 2025-11-13
DeepSeek V3.1
41.5
Rank #67/86 · confidence 1 · eval date 2025-08-21
GPT-5.1
winner72.9
Rank #30/86 · confidence 1 · eval date 2025-11-13
DeepSeek V3.1
37.4
Rank #71/84 · confidence 1 · eval date 2025-08-21
GPT-5.1
winner81.9
Rank #52/84 · 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 V3.1 | 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 V3.1 | GPT-5.1 |
|---|---|---|
35 tests | DeepSeek V3.1 speed / latency 265 tok/s / 951ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
31 tests | DeepSeek V3.1 speed / latency 68 tok/s / 3024ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | DeepSeek V3.1 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency 179 tok/s / 6622ms input / output No data |
5 tests | DeepSeek V3.1 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
0 tests | DeepSeek V3.1 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
DeepSeek V3.1 deepseek-v3.1 speed / latency No data input / output $0.038/M/$0.115/M | GPT-5.1 gpt-5.1 speed / latency No data input / output $0.086/M | |
DeepSeek V3.1 deepseek-v3.1 speed / latency No data input / output $0/request | GPT-5.1 gpt-5.1-chat-latest speed / latency No data input / output $0/request | |
DeepSeek V3.1 deepseek-v3.1 speed / latency No data input / output $0.012/M/$0.017/M | GPT-5.1 gpt-5.1-chat-latest speed / latency No data input / output $0.171/M |
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
| Features | None listed | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
