Data points: 135
Model compare
The readout for Gemini 3.5 Flash and GPT-5.2, before the detailed comparison sheet.
Weighted outcome: GPT-5.2. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.2
GPT-5.2 has the higher weighted result; Model A / B score 41 to 59.
Evidence depth
135 data points
Includes 36 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with GPT-5.2
The charts below split 45 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 3.5 Flash and GPT-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Gemini 3.5 Flash | GPT-5.2 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 41.0 pts | 59.0 pts |
| Benchmark category leads | 3 categories | 4 categories |
| Operational advantages | Cheapest input price | Free providers, Provider coverage |
| Context window | 1.0M tokens | 400K tokens |
| Max output | 65.5K tokens | 128K tokens |
| Modalities | Input TextImagevideoFileAudio 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 3.5 Flash | GPT-5.2 |
|---|---|---|
| Developer | OpenAI | |
| Released | May 2026 | Dec 2025 |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | 2025-01-01 | No data |
| OpenRouter ID | google/gemini-3.5-flash | openai/gpt-5.2 |
| References | No data | No data |
This report only uses LMSpeed data for Gemini 3.5 Flash and GPT-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Gemini 3.5 Flash
Gemini 3.5 Flash is stronger in benchmark categories (Agents, Multimodal, Instruction following) and operational dimensions (Cheapest input price).
GPT-5.2
GPT-5.2 is stronger in benchmark categories (Coding, Reasoning, Knowledge, Math) and operational dimensions (Free providers, 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 3.5 Flash
56.3
Avg. score
GPT-5.2
52.9
Gemini 3.5 Flash leads by 10.8
GPT-5.2 leads by 2.3
GPT-5.2 leads by 0.3
GPT-5.2 leads by 0.1
GPT-5.2 leads by 0.8
No data
Gemini 3.5 Flash leads by 15.7
Gemini 3.5 Flash leads by 0.4
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 3.5 Flash
winner71.0
Rank #16/83 · confidence 4 · eval date 2026-05-19
GPT-5.2
55.0
Rank #47/83 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner240.1 tok/s
Rank #9/139 · confidence 4
GPT-5.2
62.2 tok/s
Rank #92/139 · confidence 4
Gemini 3.5 Flash
10.48 s
Rank #75/139 · confidence 4
GPT-5.2
winner0.62 s
Rank #17/139 · confidence 4
Gemini 3.5 Flash
10.48 s
Rank #117/139 · confidence 4
GPT-5.2
winner0.62 s
Rank #25/139 · confidence 4
Gemini 3.5 Flash
winner$3.38/M
Rank #118/163 · confidence 4
GPT-5.2
$4.81/M
Rank #134/163 · confidence 4
Gemini 3.5 Flash
winner$1.50/M
Rank #120/163 · confidence 4
GPT-5.2
$1.75/M
Rank #122/163 · confidence 4
Gemini 3.5 Flash
winner$9.00/M
Rank #121/163 · confidence 4
GPT-5.2
$14.00/M
Rank #135/163 · confidence 4
Gemini 3.5 Flash
winner72.1
Rank #5/9 · confidence 4 · eval date 2026-05-19
GPT-5.2
52.9
Rank #7/9 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner92.2%
Rank #9/187 · confidence 4
GPT-5.2
71.2%
Rank #110/187 · confidence 4
Gemini 3.5 Flash
winner41.0%
Rank #9/186 · confidence 4
GPT-5.2
7.3%
Rank #108/186 · confidence 4
Gemini 3.5 Flash
69.3
Rank #22/89 · confidence 4 · eval date 2026-05-19
GPT-5.2
winner72.7
Rank #12/89 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner76.0
Rank #14/19 · confidence 4 · eval date 2026-05-19
GPT-5.2
65.4
Rank #17/19 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner13.1
Rank #16/73 · confidence 4 · eval date 2026-05-19
GPT-5.2
11.6
Rank #19/73 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
48.7
Rank #9/33 · confidence 4 · eval date 2026-05-19
GPT-5.2
winner53.5
Rank #6/33 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner53.1%
Rank #11/184 · confidence 4
GPT-5.2
40.4%
Rank #63/184 · confidence 4
Gemini 3.5 Flash
winner53.1
Rank #15/96 · confidence 4 · eval date 2026-05-19
GPT-5.2
52.1
Rank #17/96 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
55.1
Rank #27/37 · confidence 4 · eval date 2026-05-19
GPT-5.2
winner55.6
Rank #25/37 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner58.5
Rank #28/64 · confidence 4 · eval date 2026-05-19
GPT-5.2
57.6
Rank #33/64 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
39.0
Rank #12/47 · confidence 4 · eval date 2026-05-19
GPT-5.2
winner40.7
Rank #10/47 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
14.6
Rank #14/35 · confidence 4 · eval date 2026-05-19
GPT-5.2
winner18.8
Rank #11/35 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
56.0
Rank #27/56 · confidence 4 · eval date 2026-05-19
GPT-5.2
winner58.5
Rank #24/56 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner51.9
Rank #7/90 · confidence 4 · eval date 2026-05-19
GPT-5.2
43.8
Rank #16/90 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner41.0
Rank #8/96 · confidence 4 · eval date 2026-05-19
GPT-5.2
35.4
Rank #21/96 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner92.2
Rank #9/96 · confidence 4 · eval date 2026-05-19
GPT-5.2
90.3
Rank #18/96 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner50.2
Rank #12/99 · confidence 4 · eval date 2026-05-19
GPT-5.2
42.2
Rank #21/99 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
66.2
Rank #32/54 · confidence 4 · eval date 2026-05-19
GPT-5.2
winner81.0
Rank #13/54 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
60.7
Rank #62/90 · confidence 4 · eval date 2026-05-19
GPT-5.2
winner79.7
Rank #40/90 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner83.6
Rank #3/26 · confidence 4 · eval date 2026-05-19
GPT-5.2
79.5
Rank #9/26 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner84.0
Rank #4/34 · confidence 4 · eval date 2026-05-19
GPT-5.2
69.3
Rank #11/34 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner84.2
Rank #5/21 · confidence 4 · eval date 2026-05-19
GPT-5.2
82.1
Rank #7/21 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner1287.0
Rank #18/65 · confidence 4 · eval date 2026-05-19
GPT-5.2
1227.0
Rank #35/65 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner76.3
Rank #13/86 · confidence 4 · eval date 2026-05-19
GPT-5.2
75.4
Rank #21/86 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner78.4
Rank #5/21 · confidence 4 · eval date 2026-05-19
GPT-5.2
47.3
Rank #20/21 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner61.9
Rank #10/50 · confidence 4 · eval date 2026-05-19
GPT-5.2
46.5
Rank #29/50 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner77.7
Rank #12/52 · confidence 4 · eval date 2026-05-19
GPT-5.2
22.0
Rank #47/52 · confidence 3 · eval date 2025-12-11
Gemini 3.5 Flash
winner95.3
Rank #17/84 · confidence 4 · eval date 2026-05-19
GPT-5.2
84.8
Rank #44/84 · confidence 3 · eval date 2025-12-11
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 3.5 Flash | GPT-5.2 |
|---|---|---|
| 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 3.5 Flash | GPT-5.2 |
|---|---|---|
15 tests | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 56 tok/s / 1798ms input / output No data |
5 tests | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 64 tok/s / 5256ms input / output No data |
5 tests | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 55 tok/s / 1434ms input / output No data |
5 tests | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 32 tok/s / 1965ms input / output No data |
0 tests | Gemini 3.5 Flash gemini-3.5-flash-low speed / latency N/A / N/A input / output $0.010/request | GPT-5.2 gpt-5-2 speed / latency N/A / N/A input / output $0.080/request |
Gemini 3.5 Flash gemini-3.5-flash speed / latency No data input / output $0/M/$0/M | GPT-5.2 gpt-5.2 speed / latency No data input / output $0.024/M | |
Gemini 3.5 Flash gemini-3.5-flash speed / latency No data input / output $0/request | GPT-5.2 gpt-5.2-chat speed / latency No data input / output $0/request | |
Gemini 3.5 Flash gemini-3.5-flash-免费 speed / latency No data input / output $0.0015/request | GPT-5.2 gpt-5.2 speed / latency No data input / output $2.36/M | |
Gemini 3.5 Flash gemini-3.5-flash-c speed / latency No data input / output $0.0027/request | GPT-5.2 gpt-5.2-chat-2026-02-10 speed / latency No data input / output $56.51/M |
Weighted outcome: GPT-5.2. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input FileImageText Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
