Data points: 81
Model compare
The readout for Gemini 2.5 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 14 to 86.
Evidence depth
81 data points
Includes 8 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 14 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 Flash Lite and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Gemini 2.5 Flash Lite | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 14.0 pts | 86.0 pts |
| Benchmark category leads | 0 categories | 3 categories |
| Operational advantages | Cheapest input price, Average speed, First-token latency | Provider coverage |
| 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 Flash Lite | GPT-5.1 |
|---|---|---|
| Developer | OpenAI | |
| Released | Sep 2025 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | 2025-01-31 | No data |
| OpenRouter ID | google/gemini-2.5-flash-lite | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for Gemini 2.5 Flash Lite and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Gemini 2.5 Flash Lite
Gemini 2.5 Flash Lite has these operational advantages: Cheapest input price, Average speed, First-token latency.
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Coding, Reasoning, Math) and operational dimensions (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 2.5 Flash Lite
44.2
Avg. score
GPT-5.1
52
GPT-5.1
GPT-5.1 leads by 13.1
GPT-5.1 leads by 9.6
GPT-5.1
GPT-5.1 leads by 0.6
No data
No data
GPT-5.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 2.5 Flash Lite
winner$0.100/M
Rank #8/162 · confidence 4
GPT-5.1
$1.25/M
Rank #107/162 · confidence 4
Gemini 2.5 Flash Lite
winner$0.175/M
Rank #12/162 · confidence 4
GPT-5.1
$3.44/M
Rank #117/162 · confidence 4
Gemini 2.5 Flash Lite
winner$0.400/M
Rank #13/162 · confidence 4
GPT-5.1
$10.00/M
Rank #120/162 · confidence 4
Gemini 2.5 Flash Lite
75.9%
Rank #82/125 · confidence 4
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
Gemini 2.5 Flash Lite
62.5%
Rank #133/188 · confidence 4
GPT-5.1
winner87.3%
Rank #33/188 · confidence 4
Gemini 2.5 Flash Lite
6.4%
Rank #120/187 · confidence 4
GPT-5.1
winner26.5%
Rank #40/187 · confidence 4
Gemini 2.5 Flash Lite
59.3%
Rank #44/115 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
Gemini 2.5 Flash Lite
19.3%
Rank #174/185 · confidence 4
GPT-5.1
winner43.3%
Rank #42/185 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 2.5 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 2.5 Flash Lite | GPT-5.1 |
|---|---|---|
60 tests | Gemini 2.5 Flash Lite speed / latency 276 tok/s / 1323ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
30 tests | Gemini 2.5 Flash Lite speed / latency 235 tok/s / 2518ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
15 tests | Gemini 2.5 Flash Lite speed / latency 262 tok/s / 904ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
10 tests | Gemini 2.5 Flash Lite speed / latency 298 tok/s / 524ms input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
10 tests | Gemini 2.5 Flash Lite speed / latency 209 tok/s / 1627ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
Gemini 2.5 Flash Lite gemini-2.5-flash-lite-preview-06-17 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 |
|---|
