Data points: 81
The readout for Gemini 2.5 Pro and Gemini 3.1 Flash Lite, before the detailed comparison sheet.
Decision read
Gemini 3.1 Flash Lite
Gemini 3.1 Flash Lite currently has the stronger profile, with verified wins split 2 to 4.
Evidence depth
81 data points
Includes 8 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with Gemini 3.1 Flash Lite
The charts below split 17 high-signal samples across speed, scores, and audit health.
Model compare Gemini 2.5 Pro vs Gemini 3.1 Flash Litegemini-2-5-pro-vs-gemini-3-1-flash-lite | Model A Gemini 2.5 Pro | Model B Gemini 3.1 Flash Lite |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 2 wins | 4 wins |
| Where it leads | Provider coverage, Recent tests | Cheapest input price, Average speed, First-token latency, Free providers |
| Model metadata | Gemini 2.5 Pro exposes 1.0M tokens; notable signals: Text input, Image input, File input, Audio input. | Gemini 3.1 Flash Lite exposes 1.0M tokens; notable signals: Text input, Image input, File input, Audio input. |
| Developer | ||
| Context window | 1.0M tokens | 1.0M tokens |
| Max output | 65.5K tokens | 65.5K tokens |
| Released | Jun 2025 | May 2026 |
| Modalities | Input TextImageFileAudiovideo Output Text | Input TextImagevideoFileAudio Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | Gemini | Gemini |
| Knowledge cutoff | 2025-01-31 | No data |
| OpenRouter ID | google/gemini-2.5-pro | google/gemini-3.1-flash-lite |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Gemini 2.5 Pro | Gemini 3.1 Flash Lite |
|---|---|---|
| Output speed | 132.3 tok/s#36 | 319.9 tok/s#3 |
| Input price | $1.25/M#30 | $0.250/M#12 |
| Output price | $10.00/M#41 | $1.50/M#20 |
| Blended price | $3.44/M#58 | $0.563/M#27 |
| SciCode | 42.8%#32 | 41.9%#37 |
| GPQA | 84.4%#36 | 82.2%#48 |
| HLE | 21.1%#37 | 16.2%#49 |
| Time to first answer token | 23.08 s#77 | 5.31 s#50 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 2.5 Pro | Gemini 3.1 Flash Lite |
|---|---|---|
| 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 | Gemini 3.1 Flash Lite |
|---|---|---|
小水管 API15 tests | Gemini 2.5 Pro gemini-2.5-pro speed / latency N/A / N/A input / output $0/M / $0/M | Gemini 3.1 Flash Lite gemini-3.1-flash-lite speed / latency 218 tok/s / 4094ms input / output $0/M / $0/M |
91VIP5 tests | Gemini 2.5 Pro speed / latency N/A / N/A input / output No data | Gemini 3.1 Flash Lite speed / latency 120 tok/s / 11321ms input / output No data |
DeepRouter5 tests | Gemini 2.5 Pro speed / latency 92 tok/s / 16347ms input / output No data | Gemini 3.1 Flash Lite speed / latency N/A / N/A input / output No data |
ModelPool5 tests | Gemini 2.5 Pro speed / latency 81 tok/s / 21179ms input / output No data | Gemini 3.1 Flash Lite speed / latency N/A / N/A input / output No data |
Rnglg2 API5 tests | Gemini 2.5 Pro speed / latency 111 tok/s / 17899ms input / output No data | Gemini 3.1 Flash Lite speed / latency N/A / N/A input / output No data |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0.0006/M / $0.0050/M | Gemini 3.1 Flash Lite gemini-3.1-flash-lite-preview speed / latency No data input / output $0.037/M / $0.150/M | |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $0.0006/M / $0.0050/M | Gemini 3.1 Flash Lite gemini-3.1-flash-lite-preview speed / latency No data input / output $0.037/M / $0.150/M | |
Gemini 2.5 Pro gemini-2.5-pro speed / latency No data input / output $1.25/M / $10.00/M | Gemini 3.1 Flash Lite gemini-3.1-flash-lite speed / latency No data input / output $0.010/M / $0.010/M | |
Gemini 2.5 Pro cli/gemini-2.5-pro speed / latency No data input / output $0.100/M / $0.100/M | Gemini 3.1 Flash Lite gemini-3.1-flash-lite-preview speed / latency No data input / output $0.010/M / $0.010/M |
This report only uses LMSpeed data for Gemini 2.5 Pro and Gemini 3.1 Flash Lite: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 2.5 Pro | Gemini 3.1 Flash Lite |
|---|---|---|
| When to choose each model | Gemini 2.5 Pro Gemini 2.5 Pro is stronger when you prioritize Provider coverage, Recent tests. | Gemini 3.1 Flash Lite Gemini 3.1 Flash Lite is stronger when you prioritize Cheapest input price, Average speed, First-token latency, Free providers. |
TL;DR: Gemini 3.1 Flash Lite leads across 81 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 2.5 Pro vs Gemini 3.1 Flash Lite into nearby model comparisons with enough verified LMSpeed data.
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
