Data points: 78
Model compare
The readout for Gemini 1.5 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 24 to 76.
Evidence depth
78 data points
Includes 11 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 19 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 1.5 Pro and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Gemini 1.5 Pro | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 24.0 pts | 76.0 pts |
| Benchmark category leads | 1 categories | 3 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 | Gemini 1.5 Pro | GPT-5.1 |
|---|---|---|
| Developer | 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 Gemini 1.5 Pro and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Gemini 1.5 Pro
Gemini 1.5 Pro is stronger in benchmark categories (Knowledge) and operational dimensions (First-token latency).
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Coding, Reasoning, Math) 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
Gemini 1.5 Pro
44.8
Avg. score
GPT-5.1
52
GPT-5.1
GPT-5.1 leads by 8.9
GPT-5.1 leads by 12.5
Gemini 1.5 Pro leads by 1.1
GPT-5.1 leads by 10.4
No data
No data
GPT-5.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 1.5 Pro
75.0%
Rank #89/125 · confidence 4
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
Gemini 1.5 Pro
58.9%
Rank #144/188 · confidence 4
GPT-5.1
winner87.3%
Rank #33/188 · confidence 4
Gemini 1.5 Pro
4.9%
Rank #138/187 · confidence 4
GPT-5.1
winner26.5%
Rank #40/187 · confidence 4
Gemini 1.5 Pro
31.6%
Rank #86/115 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
Gemini 1.5 Pro
23.6
Rank #49/59 · confidence 1 · eval date 2024-02-15
GPT-5.1
winner49.4
Rank #32/59 · confidence 1 · eval date 2025-11-13
Gemini 1.5 Pro
29.5%
Rank #139/185 · confidence 4
GPT-5.1
winner43.3%
Rank #42/185 · confidence 4
Gemini 1.5 Pro
29.5
Rank #87/96 · confidence 1 · eval date 2024-02-15
GPT-5.1
winner43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
Gemini 1.5 Pro
58.9
Rank #86/96 · confidence 1 · eval date 2024-02-15
GPT-5.1
winner87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
Gemini 1.5 Pro
4.9
Rank #80/96 · confidence 1 · eval date 2024-02-15
GPT-5.1
winner26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
Gemini 1.5 Pro
10.0
Rank #93/99 · confidence 1 · eval date 2024-02-15
GPT-5.1
winner36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
Gemini 1.5 Pro
55.0
Rank #52/57 · confidence 1 · eval date 2024-02-15
GPT-5.1
winner75.5
Rank #23/57 · 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 1.5 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 1.5 Pro | GPT-5.1 |
|---|---|---|
5 tests | Gemini 1.5 Pro speed / latency 18 tok/s / 2583ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
0 tests | Gemini 1.5 Pro speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
0 tests | Gemini 1.5 Pro speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
0 tests | Gemini 1.5 Pro speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
0 tests | Gemini 1.5 Pro speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
Gemini 1.5 Pro gemini-1.5-pro speed / latency No data input / output $0/request | GPT-5.1 gpt-5.1-chat-latest speed / latency No data input / output $0/request | |
Gemini 1.5 Pro gemini-1.5-pro speed / latency No data input / output $0.342/M/$1.37/M | GPT-5.1 gpt-5.1 speed / latency No data input / output $0.342/M | |
Gemini 1.5 Pro gemini-1.5-pro-latest speed / latency No data input / output $1.22/M/$4.90/M | GPT-5.1 gpt-5.1-chat-latest speed / latency No data input / output $2.14/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 |
|---|
