Data points: 117
Model compare
The readout for Gemini 3.1 Pro and Gemini 3 Flash, before the detailed comparison sheet.
Weighted outcome: Gemini 3.1 Pro. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Gemini 3.1 Pro
Gemini 3.1 Pro has the higher weighted result; Model A / B score 82 to 18.
Evidence depth
117 data points
Includes 19 benchmark rows, 3 audit samples, and 7 provider examples.
Selection signal
Start with Gemini 3.1 Pro
The charts below split 29 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 3.1 Pro and Gemini 3 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Gemini 3.1 Pro | Gemini 3 Flash |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 82.0 pts | 18.0 pts |
| Benchmark category leads | 6 categories | 0 categories |
| Operational advantages | No data | Cheapest input price, Average speed, First-token latency, Free providers |
| Context window | 1.0M tokens | 1.0M tokens |
| Max output | 65.5K tokens | 65.5K tokens |
| Modalities | Input AudioFileImageTextvideo Output |
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 3.1 Pro | Gemini 3 Flash |
|---|---|---|
| Developer | ||
| Released | Feb 2026 | Dec 2025 |
| 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 |
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.
Gemini 3.1 Pro
Gemini 3.1 Pro leads these benchmark categories: Agents, Coding, Reasoning, Knowledge, Math.
Gemini 3 Flash
Gemini 3 Flash has these operational advantages: Cheapest input price, Average speed, First-token latency, Free providers.
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 3.1 Pro
56.6
Avg. score
Gemini 3 Flash
50.1
Gemini 3.1 Pro leads by 7.9
Gemini 3.1 Pro leads by 5.3
Gemini 3.1 Pro leads by 5.9
Gemini 3.1 Pro leads by 6.3
Gemini 3.1 Pro leads by 3.4
Gemini 3.1 Pro
Gemini 3.1 Pro
Gemini 3.1 Pro leads by 7.6
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 3.1 Pro
winner71.0
Rank #12/84 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
57.0
Rank #38/84 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner17.7
Rank #12/73 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
1.4
Rank #50/73 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner72.7
Rank #13/89 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
48.0
Rank #68/89 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner58.9
Rank #2/96 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
49.9
Rank #23/96 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner32.0
Rank #13/33 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
20.2
Rank #21/33 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner16.7
Rank #13/35 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
4.2
Rank #23/35 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner36.9
Rank #15/47 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
35.6
Rank #16/47 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner55.2
Rank #28/56 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
50.5
Rank #29/56 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner94.1
Rank #1/96 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
81.2
Rank #59/96 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner44.7
Rank #4/96 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
14.1
Rank #62/96 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner55.3
Rank #5/90 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
45.5
Rank #14/90 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
49.9
Rank #68/90 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
winner90.2
Rank #11/90 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner46.5
Rank #14/99 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
27.4
Rank #62/99 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner82.4
Rank #3/57 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
78.6
Rank #12/57 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner1276.0
Rank #21/66 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
1221.0
Rank #34/66 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner77.1
Rank #10/86 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
55.1
Rank #56/86 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner56.9
Rank #14/50 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
56.6
Rank #16/50 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner95.6
Rank #15/84 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
43.3
Rank #70/84 · confidence 1 · eval date 2025-12-01
Gemini 3.1 Pro
winner57.8
Rank #17/28 · confidence 3 · eval date 2026-02-19
Gemini 3 Flash
49.2
Rank #25/28 · confidence 1 · eval date 2025-12-01
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 87 848480100 | Gemini 3 Flash gemini-3-flash-preview No audit yet |
Winner: Gemini 3.1 Pro | Gemini 3.1 Pro gemini-3.1-pro-preview Audit score 83 787280100 | Gemini 3 Flash gemini-3-flash-preview No audit yet |
Winner: Gemini 3.1 Pro | Gemini 3.1 Pro gemini-3.1-pro-preview Audit score 79 698463100 | Gemini 3 Flash gemini-3-flash-preview No audit yet |
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 | Gemini 3 Flash speed / latency 129 tok/s / 10293ms input / output No data |
40 tests | Gemini 3.1 Pro speed / latency N/A / N/A input / output No data | Gemini 3 Flash speed / latency 269 tok/s / 4314ms input / output No data |
20 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 |
15 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 |
15 tests | Gemini 3.1 Pro speed / latency 101 tok/s / 15025ms input / output No data | Gemini 3 Flash speed / latency 287 tok/s / 4944ms 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 | |
Gemini 3.1 Pro gemini-3.1-pro-preview speed / latency No data input / output $0/request | Gemini 3 Flash gemini-3-flash-preview-nothinking speed / latency No data input / output $0/request |
Weighted outcome: Gemini 3.1 Pro. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input TextImageFileAudiovideo Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
