Data points: 114
Model compare
The readout for GPT-5.1 and GPT-5.2, before the detailed comparison sheet.
Weighted outcome: GPT-5.2. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.2
GPT-5.2 has the higher weighted result; Model A / B score 10 to 90.
Evidence depth
114 data points
Includes 25 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.2
The charts below split 31 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 GPT-5.1 and GPT-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.1 | GPT-5.2 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 10.0 pts | 90.0 pts |
| Benchmark category leads | 0 categories | 6 categories |
| Operational advantages | Average speed, First-token latency | Free providers, Provider coverage |
| Context window | 400K tokens | 400K tokens |
| Max output | 128K tokens | 128K tokens |
| Modalities | Input ImageTextFile Output Text | Input |
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 | GPT-5.1 | GPT-5.2 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Nov 2025 | Dec 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | openai/gpt-5.1 | openai/gpt-5.2 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.1 and GPT-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.1
GPT-5.1 has these operational advantages: Average speed, First-token latency.
GPT-5.2
GPT-5.2 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Math) and operational dimensions (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
GPT-5.1
52
Avg. score
GPT-5.2
52.8
GPT-5.2 leads by 0.2
GPT-5.2 leads by 7.4
GPT-5.2 leads by 1.9
GPT-5.2 leads by 2.9
GPT-5.2 leads by 1.9
No data
GPT-5.2
GPT-5.2 leads by 1.0
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.1
winner56.0
Rank #41/84 · confidence 1 · eval date 2025-11-13
GPT-5.2
53.0
Rank #50/84 · confidence 3 · eval date 2025-12-11
GPT-5.1
winner$1.25/M
Rank #107/162 · confidence 4
GPT-5.2
$1.75/M
Rank #120/162 · confidence 4
GPT-5.1
winner$3.44/M
Rank #117/162 · confidence 4
GPT-5.2
$4.81/M
Rank #132/162 · confidence 4
GPT-5.1
winner$10.00/M
Rank #120/162 · confidence 4
GPT-5.2
$14.00/M
Rank #133/162 · confidence 4
GPT-5.1
winner75.0
Rank #3/89 · confidence 1 · eval date 2025-11-13
GPT-5.2
72.7
Rank #13/89 · confidence 3 · eval date 2025-12-11
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
GPT-5.2
81.4%
Rank #54/125 · confidence 4
GPT-5.1
4.9
Rank #34/73 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner11.6
Rank #20/73 · confidence 3 · eval date 2025-12-11
GPT-5.1
winner87.3%
Rank #33/188 · confidence 4
GPT-5.2
71.2%
Rank #110/188 · confidence 4
GPT-5.1
winner26.5%
Rank #40/187 · confidence 4
GPT-5.2
7.3%
Rank #109/187 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
GPT-5.2
66.9%
Rank #36/115 · confidence 4
GPT-5.1
24.6
Rank #18/33 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner53.5
Rank #6/33 · confidence 3 · eval date 2025-12-11
GPT-5.1
43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner52.1
Rank #18/96 · confidence 3 · eval date 2025-12-11
GPT-5.1
winner43.3%
Rank #42/185 · confidence 4
GPT-5.2
40.4%
Rank #64/185 · confidence 4
GPT-5.1
31.0
Rank #19/47 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner40.7
Rank #10/47 · confidence 3 · eval date 2025-12-11
GPT-5.1
12.5
Rank #16/35 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner18.8
Rank #11/35 · confidence 3 · eval date 2025-12-11
GPT-5.1
49.9
Rank #30/56 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner58.5
Rank #24/56 · confidence 3 · eval date 2025-12-11
GPT-5.1
37.6
Rank #31/90 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner43.8
Rank #16/90 · confidence 3 · eval date 2025-12-11
GPT-5.1
87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner90.3
Rank #19/96 · confidence 3 · eval date 2025-12-11
GPT-5.1
26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner35.4
Rank #21/96 · confidence 3 · eval date 2025-12-11
GPT-5.1
36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner42.2
Rank #22/99 · confidence 3 · eval date 2025-12-11
GPT-5.1
51.3
Rank #65/90 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner79.7
Rank #39/90 · confidence 3 · eval date 2025-12-11
GPT-5.1
1217.0
Rank #39/66 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner1224.0
Rank #37/66 · confidence 3 · eval date 2025-12-11
GPT-5.1
72.9
Rank #30/86 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner75.4
Rank #21/86 · confidence 3 · eval date 2025-12-11
GPT-5.1
41.2
Rank #35/50 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner46.5
Rank #29/50 · confidence 3 · eval date 2025-12-11
GPT-5.1
81.9
Rank #52/84 · confidence 1 · eval date 2025-11-13
GPT-5.2
winner84.8
Rank #44/84 · confidence 3 · eval date 2025-12-11
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.1 | GPT-5.2 |
|---|---|---|
| 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 | GPT-5.1 | GPT-5.2 |
|---|---|---|
20 tests | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data | GPT-5.2 speed / latency 56 tok/s / 1798ms input / output No data |
15 tests | GPT-5.1 speed / latency 137 tok/s / 3299ms input / output No data | GPT-5.2 speed / latency 64 tok/s / 3553ms input / output No data |
15 tests | GPT-5.1 speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 52 tok/s / 2671ms input / output No data |
5 tests | GPT-5.1 speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 65 tok/s / 4770ms input / output No data |
5 tests | GPT-5.1 speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 64 tok/s / 5256ms input / output No data |
GPT-5.1 gpt-5.1 speed / latency No data input / output $0/request | GPT-5.2 gpt-5.2-chat-latest speed / latency No data input / output $0/request |
Weighted outcome: GPT-5.2. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
