Data points: 102
Model compare
The readout for Gemini 3.5 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 0 to 100.
Evidence depth
102 data points
Includes 20 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 28 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 3.5 Flash-Lite and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Gemini 3.5 Flash-Lite | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 0.0 pts | 100.0 pts |
| Benchmark category leads | 0 categories | 4 categories |
| Operational advantages | No data | Cheapest input price, Free providers, Provider coverage |
| Context window | 1.0M tokens | 400K tokens |
| Max output | 65.5K tokens | 128K tokens |
| Modalities | Input TextImagevideoFileAudio Output Text | Input ImageTextFile Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
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 3.5 Flash-Lite | GPT-5.1 |
|---|---|---|
| Developer | OpenAI | |
| Released | Jul 2026 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | google/gemini-3.5-flash-lite | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for Gemini 3.5 Flash-Lite and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Gemini 3.5 Flash-Lite
Gemini 3.5 Flash-Lite does not clearly lead in the benchmark or operational dimensions shared by both models.
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge) and operational dimensions (Cheapest input price, 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 3.5 Flash-Lite
48
Avg. score
GPT-5.1
52
GPT-5.1 leads by 5.7
GPT-5.1 leads by 1.2
GPT-5.1 leads by 1.1
GPT-5.1 leads by 1.7
GPT-5.1
No data
Gemini 3.5 Flash-Lite
GPT-5.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 3.5 Flash-Lite
winner61.0
Rank #33/90 · confidence 1 · eval date 2026-07-21
GPT-5.1
56.0
Rank #47/90 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
winner$0.300/M
Rank #47/169 · confidence 4
GPT-5.1
$1.25/M
Rank #110/169 · confidence 4
Gemini 3.5 Flash-Lite
winner$0.850/M
Rank #68/169 · confidence 4
GPT-5.1
$3.44/M
Rank #123/169 · confidence 4
Gemini 3.5 Flash-Lite
winner$2.50/M
Rank #76/169 · confidence 4
GPT-5.1
$10.00/M
Rank #126/169 · confidence 4
Gemini 3.5 Flash-Lite
62.0
Rank #60/94 · confidence 1 · eval date 2026-07-21
GPT-5.1
winner75.0
Rank #3/94 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
83.8%
Rank #59/194 · confidence 4
GPT-5.1
winner87.3%
Rank #36/194 · confidence 4
Gemini 3.5 Flash-Lite
17.5%
Rank #69/193 · confidence 4
GPT-5.1
winner26.5%
Rank #45/193 · confidence 4
Gemini 3.5 Flash-Lite
49.3
Rank #37/64 · confidence 1 · eval date 2026-07-21
GPT-5.1
winner49.4
Rank #36/64 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
40.9%
Rank #63/191 · confidence 4
GPT-5.1
winner43.3%
Rank #46/191 · confidence 4
Gemini 3.5 Flash-Lite
40.9
Rank #57/101 · confidence 1 · eval date 2026-07-21
GPT-5.1
winner43.3
Rank #49/101 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
winner6.9
Rank #20/34 · confidence 1 · eval date 2026-07-21
GPT-5.1
5.6
Rank #23/34 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
30.3
Rank #47/95 · confidence 1 · eval date 2026-07-21
GPT-5.1
winner37.6
Rank #35/95 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
83.8
Rank #57/101 · confidence 1 · eval date 2026-07-21
GPT-5.1
winner87.3
Rank #39/101 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
17.5
Rank #62/101 · confidence 1 · eval date 2026-07-21
GPT-5.1
winner26.5
Rank #43/101 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
36.5
Rank #47/104 · confidence 1 · eval date 2026-07-21
GPT-5.1
winner36.9
Rank #46/104 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
33.5
Rank #85/95 · confidence 1 · eval date 2026-07-21
GPT-5.1
winner51.3
Rank #67/95 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
winner79.0
Rank #13/61 · confidence 1 · eval date 2026-07-21
GPT-5.1
75.5
Rank #26/61 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
winner1139.0
Rank #31/60 · confidence 1 · eval date 2026-07-21
GPT-5.1
988.0
Rank #40/60 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
winner31.9
Rank #31/55 · confidence 1 · eval date 2026-07-21
GPT-5.1
24.4
Rank #40/55 · confidence 1 · eval date 2025-11-13
Gemini 3.5 Flash-Lite
winner26.8
Rank #32/60 · confidence 1 · eval date 2026-07-21
GPT-5.1
21.0
Rank #41/60 · 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 3.5 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 3.5 Flash-Lite | GPT-5.1 |
|---|---|---|
N1N5 tests | Gemini 3.5 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 |
AAAI0 tests | Gemini 3.5 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 |
CaMeL AI0 tests | Gemini 3.5 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 |
DeepKey API0 tests | Gemini 3.5 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 |
DuckCoding0 tests | Gemini 3.5 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 3.5 Flash-Lite gemini-3.5-flash-lite speed / latency No data input / output $0/request | GPT-5.1 gpt-5.1 speed / latency No data input / output $0/request | |
Gemini 3.5 Flash-Lite gemini-3.5-flash-lite speed / latency No data input / output $0.021/M/$0.171/M | GPT-5.1 gpt-5.1 speed / latency No data input / output $0.086/M/$0.685/M | |
Gemini 3.5 Flash-Lite gemini-3.5-flash-lite speed / latency No data input / output $0.050/M/$0.200/M | GPT-5.1 gpt-5.1-chat speed / latency No data input / output $37.50/M/$300.00/M |
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
