Data points: 107
The readout for Gemini 2.5 Flash and Gemini 3.1 Pro, before the detailed comparison sheet.
Decision read
Gemini 2.5 Flash
Gemini 2.5 Flash currently has the stronger profile, with verified wins split 4 to 2.
Evidence depth
107 data points
Includes 21 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with Gemini 2.5 Flash
The charts below split 30 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.
Model compare Gemini 2.5 Flash vs Gemini 3.1 Progemini-2-5-flash-vs-gemini-3-1-pro | Model A Gemini 2.5 Flash | Model B Gemini 3.1 Pro |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 4 wins | 2 wins |
| Where it leads | Cheapest input price, Average speed, First-token latency, Recent tests |
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
50
Avg. score
Gemini 3.1 Pro
63.6
Selected category
Instruction following
Gemini 3.1 Pro leads by 38.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 2.5 Flash
39.0
Rank #69/96 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner89.0
Rank #2/96 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
42.2
Rank #44/65 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner95.9
Rank #1/65 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
1.4
Rank #33/54 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner17.7
Rank #5/54 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
45.9
Rank #53/67 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner72.7
Rank #7/67 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
29.1
Rank #67/74 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner58.9
Rank #1/74 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
20.4
Rank #74/83 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner90.1
Rank #3/83 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
12.1
Rank #59/69 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner53.8
Rank #4/69 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
68.3
Rank #57/74 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner94.1
Rank #1/74 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
5.1
Rank #59/74 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner44.7
Rank #2/74 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
26.5
Rank #38/68 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner55.3
Rank #2/68 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
27.1
Rank #73/79 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner90.7
Rank #3/79 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
winner93.3
Rank #5/68 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
49.9
Rank #52/68 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
14.1
Rank #66/77 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner46.5
Rank #5/77 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
33.6
Rank #43/59 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner100.0
Rank #1/59 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
65.5
Rank #31/41 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner82.4
Rank #1/41 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
54.8
Rank #51/70 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner82.8
Rank #9/70 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
1158.0
Rank #41/50 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner1294.0
Rank #11/50 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
49.1
Rank #53/66 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner88.4
Rank #5/66 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
39.0
Rank #58/70 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner77.1
Rank #6/70 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
14.9
Rank #68/68 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner95.6
Rank #12/68 · confidence 3 · eval date 2026-02-19
Gemini 2.5 Flash
37.3
Rank #61/81 · confidence 1 · eval date 2025-06-17
Gemini 3.1 Pro
winner78.8
Rank #13/81 · confidence 3 · eval date 2026-02-19
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 2.5 Flash | Gemini 3.1 Pro |
|---|---|---|
| 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 3.1 Pro |
|---|---|---|
25 tests | Gemini 2.5 Flash gemini-2.5-flash speed / latency 139 tok/s / 4002ms input / output $0.0001/M / $0.0013/M |
This report only uses LMSpeed data for Gemini 2.5 Flash and Gemini 3.1 Pro: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 2.5 Flash | Gemini 3.1 Pro |
|---|---|---|
| When to choose each model | Gemini 2.5 Flash Gemini 2.5 Flash is stronger when you prioritize Cheapest input price, Average speed, First-token latency, Recent tests. | Gemini 3.1 Pro Gemini 3.1 Pro is stronger when you prioritize Free providers, Provider coverage. |
TL;DR: Gemini 2.5 Flash leads across 107 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 2.5 Flash vs Gemini 3.1 Pro into nearby model comparisons with enough verified LMSpeed data.
| 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 3.1 Pro 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 | Feb 2026 |
| Modalities | Input FileImageTextAudiovideo Output Text | Input AudioFileImageTextvideo 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-3.1-pro-preview |
| References | No data | No data |
Gemini 3.1 Pro
gemini-3.1-pro
speed / latency
N/A / N/A
input / output
$0.037/M / $0.150/M
CatClaw API20 tests | Gemini 2.5 Flash speed / latency 54 tok/s / 10365ms input / output No data | Gemini 3.1 Pro speed / latency 121 tok/s / 11404ms input / output No data |
|---|
OpenRouter10 tests | Gemini 2.5 Flash speed / latency 141 tok/s / 2052ms input / output No data | Gemini 3.1 Pro speed / latency N/A / N/A input / output No data |
|---|
TradingBase API10 tests | Gemini 2.5 Flash speed / latency N/A / N/A input / output No data | Gemini 3.1 Pro speed / latency 102 tok/s / 12933ms input / output No data |
|---|
UniAiX10 tests | Gemini 2.5 Flash speed / latency 158 tok/s / 9767ms input / output No data | Gemini 3.1 Pro speed / latency N/A / N/A input / output No data |
|---|
Gemini 2.5 Flash gemini-2.5-flash 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/M / $0/M |
Gemini 2.5 Flash gemini-2.5-flash speed / latency No data input / output $0.0001/M / $0.0013/M | Gemini 3.1 Pro gemini-3.1-pro speed / latency No data input / output $0.037/M / $0.150/M |
Gemini 2.5 Flash gemini-2.5-flash-c speed / latency No data input / output $0.0027/M / $0.0027/M | Gemini 3.1 Pro gemini-3.1-pro-preview-medium speed / latency No data input / output $0.274/M / $1.64/M |
Gemini 2.5 Flash gemini-2.5-flash speed / latency No data input / output $0.0040/M / $0.0040/M | Gemini 3.1 Pro gemini-3.1-pro-preview speed / latency No data input / output $2.00/M / $12.00/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
