Data points: 117
Model compare
The readout for Gemini 2.5 Pro and Gemini 3 Flash, before the detailed comparison sheet.
Weighted outcome: Gemini 3 Flash. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Gemini 3 Flash
Gemini 3 Flash has the higher weighted result; Model A / B score 48 to 52.
Evidence depth
117 data points
Includes 26 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with Gemini 3 Flash
The charts below split 33 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 2.5 Pro and Gemini 3 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Gemini 2.5 Pro | Gemini 3 Flash |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 48.0 pts | 52.0 pts |
| Benchmark category leads | 3 categories | 3 categories |
| Operational advantages | Cheapest input price, Free providers | Average speed, First-token latency, Provider coverage |
| Context window | 1.0M tokens | 1.0M tokens |
| Max output | 65.5K tokens | 65.5K tokens |
| Modalities | Input TextImageFileAudiovideo 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 2.5 Pro | Gemini 3 Flash |
|---|---|---|
| Developer | ||
| Released | Jun 2025 | Dec 2025 |
| 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-flash-preview |
| References | No data | No data |
This report only uses LMSpeed data for Gemini 2.5 Pro and Gemini 3 Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Gemini 2.5 Pro
Gemini 2.5 Pro is stronger in benchmark categories (Agents, Reasoning, Math) and operational dimensions (Cheapest input price, Free providers).
Gemini 3 Flash
Gemini 3 Flash is stronger in benchmark categories (Coding, Knowledge, Instruction following) and operational dimensions (Average speed, First-token latency, Provider coverage).
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 Pro
46.2
Avg. score
Gemini 3 Flash
50.1
Gemini 2.5 Pro leads by 1.0
Gemini 3 Flash leads by 14.8
Gemini 2.5 Pro leads by 3.0
Gemini 3 Flash leads by 15.2
Gemini 2.5 Pro leads by 4.3
No data
No data
Gemini 3 Flash leads by 1.9
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 2.5 Pro
43.0
Rank #76/84 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner57.0
Rank #38/84 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
$1.25/M
Rank #107/162 · confidence 4
Gemini 3 Flash
winner$0.500/M
Rank #69/162 · confidence 4
Gemini 2.5 Pro
$3.44/M
Rank #117/162 · confidence 4
Gemini 3 Flash
winner$1.13/M
Rank #81/162 · confidence 4
Gemini 2.5 Pro
$10.00/M
Rank #120/162 · confidence 4
Gemini 3 Flash
winner$3.00/M
Rank #85/162 · confidence 4
Gemini 2.5 Pro
86.2%
Rank #15/125 · confidence 4
Gemini 3 Flash
winner88.2%
Rank #7/125 · confidence 4
Gemini 2.5 Pro
winner66.0
Rank #41/89 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
48.0
Rank #68/89 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
winner2.6
Rank #44/73 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
1.4
Rank #50/73 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
winner84.4%
Rank #49/188 · confidence 4
Gemini 3 Flash
81.2%
Rank #72/188 · confidence 4
Gemini 2.5 Pro
winner21.1%
Rank #53/187 · confidence 4
Gemini 3 Flash
14.1%
Rank #76/187 · confidence 4
Gemini 2.5 Pro
winner80.1%
Rank #18/115 · confidence 4
Gemini 3 Flash
79.7%
Rank #19/115 · confidence 4
Gemini 2.5 Pro
42.8%
Rank #44/185 · confidence 4
Gemini 3 Flash
winner49.9%
Rank #18/185 · confidence 4
Gemini 2.5 Pro
0.4
Rank #33/33 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner20.2
Rank #21/33 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
42.8
Rank #47/96 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner49.9
Rank #23/96 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
14.1
Rank #32/47 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner35.6
Rank #16/47 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
4.2
Rank #23/35 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
4.2
Rank #23/35 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
35.5
Rank #40/56 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner50.5
Rank #29/56 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
87.4
Rank #19/90 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner90.2
Rank #11/90 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
39.0
Rank #25/90 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner45.5
Rank #14/90 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
winner84.4
Rank #49/96 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
81.2
Rank #59/96 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
winner21.1
Rank #50/96 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
14.1
Rank #62/96 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
25.8
Rank #63/99 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner27.4
Rank #62/99 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
74.9
Rank #30/57 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner78.6
Rank #12/57 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
1192.0
Rank #45/66 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner1221.0
Rank #34/66 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
48.7
Rank #59/86 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner55.1
Rank #56/86 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
42.0
Rank #34/50 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
winner56.6
Rank #16/50 · confidence 1 · eval date 2025-12-01
Gemini 2.5 Pro
winner54.1
Rank #65/84 · confidence 1 · eval date 2025-03-01
Gemini 3 Flash
43.3
Rank #70/84 · 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 2.5 Pro | 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 Pro | Gemini 3 Flash |
|---|---|---|
60 tests | Gemini 2.5 Pro speed / latency 48 tok/s / 23637ms input / output No data | Gemini 3 Flash speed / latency 129 tok/s / 10293ms input / output No data |
40 tests | Gemini 2.5 Pro speed / latency N/A / N/A input / output No data | Gemini 3 Flash speed / latency 269 tok/s / 4314ms input / output No data |
30 tests | Gemini 2.5 Pro speed / latency N/A / N/A input / output No data | Gemini 3 Flash speed / latency 159 tok/s / 6256ms input / output No data |
25 tests | Gemini 2.5 Pro speed / latency 106 tok/s / 16405ms input / output No data | Gemini 3 Flash speed / latency 157 tok/s / 7994ms input / output No data |
15 tests | Gemini 2.5 Pro speed / latency 103 tok/s / 16912ms input / output No data | Gemini 3 Flash speed / latency 160 tok/s / 9132ms input / output No data |
Gemini 2.5 Pro gemini-2.5-pro 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 2.5 Pro gemini-2.5-pro-preview-06-05 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 Flash. 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 |
|---|
