Data points: 125
Model compare
The readout for Gemini 2.5 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 38.7 to 61.3.
Evidence depth
125 data points
Includes 30 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 36 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 Gemini 2.5 Pro and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Gemini 2.5 Pro | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 38.7 pts | 61.3 pts |
| Benchmark category leads | 2 categories | 4 categories |
| Operational advantages | Cheapest input price, Free providers, Provider coverage | Average speed, First-token latency |
| Context window | 1.0M tokens | 400K tokens |
| Max output | 65.5K tokens | 128K tokens |
| Modalities | Input TextImageFileAudiovideo |
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 | Gemini 2.5 Pro | GPT-5.1 |
|---|---|---|
| Developer | OpenAI | |
| Released | Jun 2025 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | 2025-01-31 | No data |
| OpenRouter ID | google/gemini-2.5-pro | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for Gemini 2.5 Pro and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Gemini 2.5 Pro
Gemini 2.5 Pro is stronger in benchmark categories (Reasoning, Math) and operational dimensions (Cheapest input price, Free providers, Provider coverage).
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Agents, Coding, Knowledge, Instruction following) and operational dimensions (Average speed, First-token latency).
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
Gemini 2.5 Pro
46.2
Avg. score
GPT-5.1
52
GPT-5.1 leads by 4.1
GPT-5.1 leads by 10.0
Gemini 2.5 Pro leads by 2.7
GPT-5.1 leads by 17.6
Gemini 2.5 Pro leads by 2.2
No data
No data
GPT-5.1 leads by 7.8
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 2.5 Pro
43.0
Rank #76/84 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner56.0
Rank #41/84 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
$1.25/M
Rank #107/162 · confidence 4
GPT-5.1
$1.25/M
Rank #107/162 · confidence 4
Gemini 2.5 Pro
$3.44/M
Rank #117/162 · confidence 4
GPT-5.1
$3.44/M
Rank #117/162 · confidence 4
Gemini 2.5 Pro
$10.00/M
Rank #120/162 · confidence 4
GPT-5.1
$10.00/M
Rank #120/162 · confidence 4
Gemini 2.5 Pro
66.0
Rank #41/89 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner75.0
Rank #3/89 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
86.2%
Rank #15/125 · confidence 4
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
Gemini 2.5 Pro
84.4%
Rank #49/188 · confidence 4
GPT-5.1
winner87.3%
Rank #33/188 · confidence 4
Gemini 2.5 Pro
2.6
Rank #44/73 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner4.9
Rank #34/73 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
21.1%
Rank #53/187 · confidence 4
GPT-5.1
winner26.5%
Rank #40/187 · confidence 4
Gemini 2.5 Pro
80.1%
Rank #18/115 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
Gemini 2.5 Pro
0.4
Rank #33/33 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner24.6
Rank #18/33 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
33.3
Rank #44/59 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner49.4
Rank #32/59 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
42.8%
Rank #44/185 · confidence 4
GPT-5.1
winner43.3%
Rank #42/185 · confidence 4
Gemini 2.5 Pro
42.8
Rank #47/96 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
4.2
Rank #23/35 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner12.5
Rank #16/35 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
14.1
Rank #32/47 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner31.0
Rank #19/47 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
35.5
Rank #40/56 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner49.9
Rank #30/56 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
winner87.4
Rank #19/90 · confidence 1 · eval date 2025-03-01
GPT-5.1
51.3
Rank #65/90 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
winner39.0
Rank #25/90 · confidence 1 · eval date 2025-03-01
GPT-5.1
37.6
Rank #31/90 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
84.4
Rank #49/96 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
21.1
Rank #50/96 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
25.8
Rank #63/99 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
74.9
Rank #30/57 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner75.5
Rank #23/57 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
1192.0
Rank #45/66 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner1212.0
Rank #38/66 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
48.7
Rank #59/86 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner72.9
Rank #30/86 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
winner42.0
Rank #34/50 · confidence 1 · eval date 2025-03-01
GPT-5.1
41.2
Rank #35/50 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
8.6
Rank #44/50 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner24.4
Rank #35/50 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
672.0
Rank #44/55 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner988.0
Rank #35/55 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
7.1
Rank #44/55 · confidence 1 · eval date 2025-03-01
GPT-5.1
winner21.0
Rank #36/55 · confidence 1 · eval date 2025-11-13
Gemini 2.5 Pro
54.1
Rank #65/84 · confidence 1 · eval date 2025-03-01
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 | Gemini 2.5 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 | Gemini 2.5 Pro | GPT-5.1 |
|---|---|---|
30 tests | Gemini 2.5 Pro speed / latency 48 tok/s / 23637ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
10 tests | Gemini 2.5 Pro speed / latency 106 tok/s / 16405ms input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
5 tests | Gemini 2.5 Pro speed / latency 92 tok/s / 16347ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | Gemini 2.5 Pro speed / latency 81 tok/s / 21179ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | Gemini 2.5 Pro speed / latency 111 tok/s / 17899ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0/request | GPT-5.1 gpt-5.1-all speed / latency No data input / output $0/request |
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
Input ImageTextFile Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
