Data points: 98
Model compare
The readout for Gemini 3.1 Flash Lite 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 28 to 72.
Evidence depth
98 data points
Includes 17 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 24 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 3.1 Flash Lite and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Gemini 3.1 Flash Lite | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 28.0 pts | 72.0 pts |
| Benchmark category leads | 1 categories | 3 categories |
| Operational advantages | Average speed | Cheapest input price, First-token latency, Free providers, Provider coverage |
| Context window | 1.0M tokens | 400K tokens |
| Max output | 65.5K tokens | 128K tokens |
| Modalities | Input TextImagevideoFileAudio |
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 3.1 Flash Lite | GPT-5.1 |
|---|---|---|
| Developer | OpenAI | |
| Released | May 2026 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | google/gemini-3.1-flash-lite | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for Gemini 3.1 Flash Lite and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Gemini 3.1 Flash Lite
Gemini 3.1 Flash Lite is stronger in benchmark categories (Instruction following) and operational dimensions (Average speed).
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Agents, Coding, Knowledge) and operational dimensions (Cheapest input price, First-token latency, 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 3.1 Flash Lite
46.7
Avg. score
GPT-5.1
52
GPT-5.1 leads by 5.5
GPT-5.1 leads by 8.3
Tied
GPT-5.1 leads by 5.4
GPT-5.1
No data
Gemini 3.1 Flash Lite
Gemini 3.1 Flash Lite leads by 1.8
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 3.1 Flash Lite
55.0
Rank #47/84 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner56.0
Rank #41/84 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
65.3
Rank #44/89 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner75.0
Rank #3/89 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
1.1
Rank #54/73 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner4.9
Rank #34/73 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
34.7
Rank #42/59 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner49.4
Rank #32/59 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
41.9
Rank #51/96 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
36.4
Rank #34/90 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner37.6
Rank #31/90 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
winner81.6
Rank #34/90 · confidence 1 · eval date 2026-03-03
GPT-5.1
51.3
Rank #65/90 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
82.2
Rank #55/96 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
16.2
Rank #58/96 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
25.0
Rank #65/99 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
75.5
Rank #23/57 · confidence 1 · eval date 2026-03-03
GPT-5.1
75.5
Rank #23/57 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
winner77.2
Rank #9/86 · confidence 1 · eval date 2026-03-03
GPT-5.1
72.9
Rank #30/86 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
7.4
Rank #45/50 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner24.4
Rank #35/50 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
649.0
Rank #45/55 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner988.0
Rank #35/55 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
38.5
Rank #41/50 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner41.2
Rank #35/50 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
6.2
Rank #45/55 · confidence 1 · eval date 2026-03-03
GPT-5.1
winner21.0
Rank #36/55 · confidence 1 · eval date 2025-11-13
Gemini 3.1 Flash Lite
31.3
Rank #73/84 · confidence 1 · eval date 2026-03-03
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 3.1 Flash Lite | 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 3.1 Flash Lite | GPT-5.1 |
|---|---|---|
15 tests | Gemini 3.1 Flash Lite speed / latency 218 tok/s / 4094ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | Gemini 3.1 Flash Lite speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
5 tests | Gemini 3.1 Flash Lite speed / latency 59 tok/s / 25230ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
0 tests | Gemini 3.1 Flash Lite 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 3.1 Flash Lite speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
Gemini 3.1 Flash Lite gemini-3.1-flash-lite-preview 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 3.1 Flash Lite gemini-3.1-flash-lite-preview speed / latency No data input / output $0.010/M/$0.062/M | GPT-5.1 gpt-5.1-chat-latest speed / latency No data input / output $0.771/M |
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 |
|---|
