Data points: 81
The readout for Gemini 2.5 Flash 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 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 Flash
The charts below split 17 high-signal samples across speed, scores, and audit health.
Model compare Gemini 2.5 Flash vs Gemini 3 Flashgemini-2-5-flash-vs-gemini-3-flash | Model A Gemini 2.5 Flash | Model B Gemini 3 Flash |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 2 wins | 4 wins |
| Where it leads | Average speed, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Gemini 2.5 Flash | Gemini 3 Flash |
|---|---|---|
| MMLU-Pro | 80.9%#34 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 2.5 Flash | Gemini 3 Flash |
|---|---|---|
| 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 | Gemini 3 Flash |
|---|---|---|
40 tests | Gemini 2.5 Flash speed / latency 54 tok/s / 10365ms input / output No data |
This report only uses LMSpeed data for Gemini 2.5 Flash and Gemini 3 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 2.5 Flash | Gemini 3 Flash |
|---|---|---|
| When to choose each model | Gemini 2.5 Flash Gemini 2.5 Flash is stronger when you prioritize Average speed, Recent tests. | Gemini 3 Flash Gemini 3 Flash is stronger when you prioritize Cheapest input price, First-token latency, Free providers, Provider coverage. |
TL;DR: Gemini 3 Flash leads across 81 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 2.5 Flash vs Gemini 3 Flash into nearby model comparisons with enough verified LMSpeed data.
| Cheapest input price, First-token latency, Free providers, Provider coverage |
| Model metadata | Gemini 2.5 Flash 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 | Jun 2025 | Dec 2025 |
| Modalities | Input FileImageTextAudiovideo 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 | 2025-01-31 | No data |
| OpenRouter ID | google/gemini-2.5-flash | google/gemini-3-flash-preview |
| References | No data | No data |
| Time to first answer token | 0.54 s#10 | 4.95 s#49 |
|---|
| Output speed | 194.9 tok/s#13 | 190.4 tok/s#14 |
|---|
| SciCode | 29.1%#93 | 49.9%#13 |
|---|
| Time to first token | 0.54 s#14 | 4.95 s#81 |
|---|
| Input price | $0.300/M#15 | $0.500/M#18 |
|---|
| LiveCodeBench | 49.5%#56 | 79.7%#19 |
|---|
| Output price | $2.50/M#27 | $3.00/M#28 |
|---|
Gemini 3 Flash
speed / latency
129 tok/s / 10293ms
input / output
No data
N1N25 tests | Gemini 2.5 Flash speed / latency 200 tok/s / 8207ms input / output No data | Gemini 3 Flash speed / latency 157 tok/s / 7994ms input / output No data |
|---|
SWT-API25 tests | Gemini 2.5 Flash gemini-2.5-flash speed / latency 139 tok/s / 4002ms input / output $0.0001/M / $0.0013/M | Gemini 3 Flash gemini-3-flash-preview speed / latency N/A / N/A input / output $0.037/M / $0.150/M |
|---|
Rnglg2 API15 tests | Gemini 2.5 Flash speed / latency 189 tok/s / 11433ms input / output No data | Gemini 3 Flash speed / latency 160 tok/s / 6933ms input / output No data |
|---|
素墨API13 tests | Gemini 2.5 Flash speed / latency 136 tok/s / 11323ms input / output No data | Gemini 3 Flash speed / latency 120 tok/s / 10661ms input / output No data |
|---|
Gemini 2.5 Flash gemini-2.5-flash speed / latency No data input / output $0.0001/M / $0.0013/M | Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.037/M / $0.150/M |
Gemini 2.5 Flash gemini-2.5-flash speed / latency No data input / output $0.0008/M / $0.0068/M | Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.205/M / $0.822/M |
Gemini 2.5 Flash gemini-2.5-flash speed / latency No data input / output $0.0010/M / $0.0010/M | Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.0010/M / $0.0010/M |
Gemini 2.5 Flash gemini-2.5-flash speed / latency No data input / output $0.0010/M / $0.0010/M | Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.080/M / $0.320/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
