Data points: 85
The readout for Gemini 3.1 Pro and Gemini 3 Flash, before the detailed comparison sheet.
Decision read
Gemini 3 Flash
Gemini 3 Flash currently has the stronger profile, with verified wins split 0 to 4.
Evidence depth
85 data points
Includes 8 benchmark rows, 1 audit samples, and 9 provider examples.
Selection signal
Start with Gemini 3 Flash
The charts below split 18 high-signal samples across speed, scores, and audit health.
Model compare Gemini 3.1 Pro vs Gemini 3 Flashgemini-3-1-pro-vs-gemini-3-flash | Model A Gemini 3.1 Pro | Model B Gemini 3 Flash |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 0 wins | 4 wins |
| Where it leads | No data | Average speed, First-token latency, Provider coverage, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Gemini 3.1 Pro | Gemini 3 Flash |
|---|---|---|
| GPQA | 94.1%#1 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 3.1 Pro | Gemini 3 Flash |
|---|---|---|
Winner: Gemini 3.1 Pro | Gemini 3.1 Pro gemini-3.1-pro-preview Audit score 79 69 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Gemini 3.1 Pro | Gemini 3 Flash |
|---|---|---|
40 tests | Gemini 3.1 Pro speed / latency 121 tok/s / 11404ms input / output No data |
This report only uses LMSpeed data for Gemini 3.1 Pro and Gemini 3 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 3.1 Pro | Gemini 3 Flash |
|---|---|---|
| When to choose each model | Gemini 3.1 Pro Gemini 3.1 Pro does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. | Gemini 3 Flash Gemini 3 Flash is stronger when you prioritize Average speed, First-token latency, Provider coverage, Recent tests. |
TL;DR: Gemini 3 Flash leads across 85 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 3.1 Pro vs Gemini 3 Flash into nearby model comparisons with enough verified LMSpeed data.
| Model metadata | Gemini 3.1 Pro exposes 1.0M tokens; notable signals: Text input, Image input, File input, Audio input. | Gemini 3 Flash 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 | Feb 2026 | Dec 2025 |
| Modalities | Input AudioFileImageTextvideo Output Text | Input TextImageFileAudiovideo Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputAudio inputText outputTool calling |
| Parameters | No data | No data |
| Tokenizer | Gemini | Gemini |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | google/gemini-3.1-pro-preview | google/gemini-3-flash-preview |
| References | No data | No data |
| SciCode | 58.9%#2 | 49.9%#13 |
|---|
| HLE | 44.7%#3 | 14.1%#55 |
|---|
| Output speed | 133.4 tok/s#35 | 190.4 tok/s#14 |
|---|
| Input price | $2.00/M#36 | $0.500/M#18 |
|---|
| Output price | $12.00/M#42 | $3.00/M#28 |
|---|
| Blended price | $4.50/M#61 | $1.13/M#42 |
|---|
| Time to first answer token | 28.68 s#84 | 4.95 s#49 |
|---|
Gemini 3 Flash gemini-3-flash-preview No audit yet |
Gemini 3 Flash
speed / latency
129 tok/s / 10293ms
input / output
No data
N1N20 tests | Gemini 3.1 Pro speed / latency N/A / N/A input / output No data | Gemini 3 Flash speed / latency 157 tok/s / 7994ms input / output No data |
|---|
Hi API15 tests | Gemini 3.1 Pro speed / latency 70 tok/s / 23273ms input / output No data | Gemini 3 Flash speed / latency 118 tok/s / 9594ms input / output No data |
|---|
AIHubMix10 tests | Gemini 3.1 Pro speed / latency 70 tok/s / 25059ms input / output No data | Gemini 3 Flash speed / latency 155 tok/s / 7055ms input / output No data |
|---|
Rnglg2 API10 tests | Gemini 3.1 Pro speed / latency N/A / N/A input / output No data | Gemini 3 Flash speed / latency 160 tok/s / 6933ms input / output No data |
|---|
Gemini 3.1 Pro gemini-3.1-pro-preview speed / latency No data input / output $0/M / $0/M | Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0/M / $0/M |
Gemini 3.1 Pro gemini-3.1-pro-preview speed / latency No data input / output $0.0001/M / $0.0001/M | Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.0001/M / $0.0001/M |
Gemini 3.1 Pro gemini-3.1-pro-low speed / latency No data input / output $0.010/M / $0.010/M | Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.0030/M / $0.0030/M |
Gemini 3.1 Pro gemini-3.1-pro-high speed / latency No data input / output $0.0041/M / $0.0041/M | Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.055/M / $0.329/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
