Data points: 116
Model compare
The readout for Gemini 3.5 Flash and GPT-5, before the detailed comparison sheet.
Weighted outcome: Gemini 3.5 Flash. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Gemini 3.5 Flash
Gemini 3.5 Flash has the higher weighted result; Model A / B score 73.3 to 26.7.
Evidence depth
116 data points
Includes 26 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with Gemini 3.5 Flash
The charts below split 36 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: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Gemini 3.5 Flash | GPT-5 |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 73.3 pts | 26.7 pts |
| Benchmark category leads | 5 categories | 1 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 |
|---|---|---|
| Developer | OpenAI | |
| Released | May 2026 | Aug 2025 |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | 2025-01-01 | 2024-09-30 |
| OpenRouter ID | google/gemini-3.5-flash | openai/gpt-5 |
| References | No data | No data |
This report only uses LMSpeed data for Gemini 3.5 Flash and GPT-5: 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, Coding, Reasoning, Knowledge, Instruction following) and operational dimensions (Cheapest input price).
GPT-5
GPT-5 is stronger in benchmark categories (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
52
Gemini 3.5 Flash leads by 13.6
Gemini 3.5 Flash leads by 5.4
Gemini 3.5 Flash leads by 2.7
Gemini 3.5 Flash leads by 6.0
GPT-5 leads by 6.4
No data
Gemini 3.5 Flash
Gemini 3.5 Flash leads by 2.2
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Gemini 3.5 Flash
winner240.1 tok/s
Rank #9/139 · confidence 4
GPT-5
73.8 tok/s
Rank #84/139 · confidence 4
Gemini 3.5 Flash
10.48 s
Rank #75/139 · confidence 4
GPT-5
winner0.81 s
Rank #28/139 · confidence 4
Gemini 3.5 Flash
10.48 s
Rank #117/139 · confidence 4
GPT-5
winner0.81 s
Rank #40/139 · confidence 4
Gemini 3.5 Flash
$1.50/M
Rank #120/163 · confidence 4
GPT-5
winner$1.25/M
Rank #109/163 · confidence 4
Gemini 3.5 Flash
winner$3.38/M
Rank #118/163 · confidence 4
GPT-5
$3.44/M
Rank #119/163 · confidence 4
Gemini 3.5 Flash
winner$9.00/M
Rank #121/163 · confidence 4
GPT-5
$10.00/M
Rank #122/163 · confidence 4
Gemini 3.5 Flash
69.3
Rank #22/89 · confidence 4 · eval date 2026-05-19
GPT-5
winner75.6
Rank #2/89 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner92.2%
Rank #9/187 · confidence 4
GPT-5
67.3%
Rank #120/187 · confidence 4
Gemini 3.5 Flash
winner41.0%
Rank #9/186 · confidence 4
GPT-5
5.4%
Rank #131/186 · confidence 4
Gemini 3.5 Flash
winner13.1
Rank #16/73 · confidence 4 · eval date 2026-05-19
GPT-5
5.7
Rank #30/73 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner48.7
Rank #9/33 · confidence 4 · eval date 2026-05-19
GPT-5
20.1
Rank #22/33 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner70.1
Rank #11/58 · confidence 4 · eval date 2026-05-19
GPT-5
37.8
Rank #41/58 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner53.1%
Rank #11/184 · confidence 4
GPT-5
38.8%
Rank #82/184 · confidence 4
Gemini 3.5 Flash
winner53.1
Rank #15/96 · confidence 4 · eval date 2026-05-19
GPT-5
42.9
Rank #46/96 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner51.9
Rank #7/90 · confidence 4 · eval date 2026-05-19
GPT-5
40.7
Rank #20/90 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner41.0
Rank #8/96 · confidence 4 · eval date 2026-05-19
GPT-5
26.5
Rank #39/96 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner92.2
Rank #9/96 · confidence 4 · eval date 2026-05-19
GPT-5
85.4
Rank #45/96 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner50.2
Rank #12/99 · confidence 4 · eval date 2026-05-19
GPT-5
34.7
Rank #48/99 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
60.7
Rank #62/90 · confidence 4 · eval date 2026-05-19
GPT-5
winner82.1
Rank #32/90 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner84.3
Rank #1/57 · confidence 4 · eval date 2026-05-19
GPT-5
74.2
Rank #32/57 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner1287.0
Rank #18/65 · confidence 4 · eval date 2026-05-19
GPT-5
1217.0
Rank #39/65 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner76.3
Rank #13/86 · confidence 4 · eval date 2026-05-19
GPT-5
73.1
Rank #29/86 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner37.5
Rank #12/54 · confidence 4 · eval date 2026-05-19
GPT-5
25.7
Rank #28/54 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner1349.0
Rank #13/54 · confidence 4 · eval date 2026-05-19
GPT-5
1075.0
Rank #31/54 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner42.4
Rank #13/50 · confidence 4 · eval date 2026-05-19
GPT-5
28.7
Rank #31/50 · confidence 1 · eval date 2025-08-07
Gemini 3.5 Flash
winner95.3
Rank #17/84 · confidence 4 · eval date 2026-05-19
GPT-5
84.8
Rank #44/84 · confidence 1 · eval date 2025-08-07
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 3.5 Flash | GPT-5 |
|---|---|---|
| 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 |
|---|---|---|
5 tests | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 46 tok/s / 6577ms input / output No data |
5 tests | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 102 tok/s / 948ms input / output No data |
5 tests | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 131 tok/s / 743ms input / output No data |
5 tests | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 58 tok/s / 17419ms input / output No data |
0 tests | Gemini 3.5 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency N/A / N/A input / output No data |
Gemini 3.5 Flash gemini-3.5-flash speed / latency No data input / output $0/request | GPT-5 gpt-5-chat-latest 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 gpt-5 speed / latency No data input / output $1.69/M | |
Gemini 3.5 Flash gemini-3.5-flash-c speed / latency No data input / output $0.0027/request | GPT-5 gpt-5 speed / latency No data input / output $1.16/M | |
Gemini 3.5 Flash gemini-3.5-flash-c speed / latency No data input / output $0.010/request | GPT-5 gpt-5-2025-08-07 speed / latency No data input / output $0.274/M | |
Gemini 3.5 Flash gemini-3.5-flash-c speed / latency No data input / output $0.011/request | GPT-5 gpt-5-chat speed / latency No data input / output $2.50/M |
Weighted outcome: Gemini 3.5 Flash. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
