Data points: 107
The readout for Gemini 2.5 Flash and GPT-4o, before the detailed comparison sheet.
Decision read
Gemini 2.5 Flash
Gemini 2.5 Flash currently has the stronger profile, with verified wins split 3 to 1.
Evidence depth
107 data points
Includes 31 benchmark rows, 0 audit samples, and 5 provider examples.
Selection signal
Start with Gemini 2.5 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.
Model compare Gemini 2.5 Flash vs GPT-4ogemini-2-5-flash-vs-gpt-4o | Model A Gemini 2.5 Flash | Model B GPT-4o |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 3 wins | 1 wins |
| Where it leads | Average speed, Provider coverage, Recent tests | First-token latency |
| Model metadata | Gemini 2.5 Flash exposes 1.0M tokens; notable signals: Text input, Image input, File input, Audio input. | GPT-4o exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | OpenAI | |
| Context window | 1.0M tokens | 128K tokens |
| Max output | 65.5K tokens | 16.4K tokens |
| Released | Jun 2025 | Nov 2024 |
| Modalities | Input FileImageTextAudiovideo Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeWeb search |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | 2025-01-31 | 2023-10-31 |
| OpenRouter ID | google/gemini-2.5-flash | openai/gpt-4o |
| References | No data | No data |
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
GPT-4o
43
Selected category
Math
Gemini 2.5 Flash leads by 44.7
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
GPT-4o
winner42.0
Rank #65/96 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
winner230.1 tok/s
Rank #6/113 · confidence 4
GPT-4o
195.5 tok/s
Rank #14/113 · confidence 4
Gemini 2.5 Flash
13.57 s
Rank #68/113 · confidence 4
GPT-4o
winner0.51 s
Rank #6/113 · confidence 4
Gemini 2.5 Flash
13.57 s
Rank #95/113 · confidence 4
GPT-4o
winner0.51 s
Rank #10/113 · confidence 4
Gemini 2.5 Flash
winner$0.300/M
Rank #41/138 · confidence 4
GPT-4o
$2.50/M
Rank #114/138 · confidence 4
Gemini 2.5 Flash
winner$0.850/M
Rank #58/138 · confidence 4
GPT-4o
$4.38/M
Rank #109/138 · confidence 4
Gemini 2.5 Flash
winner$2.50/M
Rank #66/138 · confidence 4
GPT-4o
$10.00/M
Rank #103/138 · confidence 4
Gemini 2.5 Flash
winner83.2%
Rank #38/113 · confidence 4
GPT-4o
74.8%
Rank #84/113 · confidence 4
Gemini 2.5 Flash
42.2
Rank #44/65 · confidence 1 · eval date 2025-06-17
GPT-4o
winner44.4
Rank #42/65 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
winner79.0%
Rank #59/152 · confidence 4
GPT-4o
54.3%
Rank #126/152 · confidence 4
Gemini 2.5 Flash
winner11.1%
Rank #67/150 · confidence 4
GPT-4o
3.3%
Rank #143/150 · confidence 4
Gemini 2.5 Flash
winner69.5%
Rank #32/108 · confidence 4
GPT-4o
30.9%
Rank #86/108 · confidence 4
Gemini 2.5 Flash
winner12.1
Rank #59/69 · confidence 1 · eval date 2025-06-17
GPT-4o
8.3
Rank #61/69 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
29.1
Rank #67/74 · confidence 1 · eval date 2025-06-17
GPT-4o
winner33.3
Rank #61/74 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
winner39.4%
Rank #62/149 · confidence 4
GPT-4o
33.3%
Rank #96/149 · confidence 4
Gemini 2.5 Flash
20.4
Rank #74/83 · confidence 1 · eval date 2025-06-17
GPT-4o
winner31.6
Rank #67/83 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
winner98.1%
Rank #7/62 · confidence 4
GPT-4o
75.9%
Rank #49/62 · confidence 4
Gemini 2.5 Flash
winner82.3%
Rank #11/60 · confidence 4
GPT-4o
15.0%
Rank #44/60 · confidence 4
Gemini 2.5 Flash
winner93.3
Rank #5/68 · confidence 1 · eval date 2025-06-17
GPT-4o
37.9
Rank #59/68 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
winner26.5
Rank #38/68 · confidence 1 · eval date 2025-06-17
GPT-4o
19.7
Rank #57/68 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
winner68.3
Rank #57/74 · confidence 1 · eval date 2025-06-17
GPT-4o
54.3
Rank #69/74 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
winner5.1
Rank #59/74 · confidence 1 · eval date 2025-06-17
GPT-4o
3.3
Rank #72/74 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
winner14.1
Rank #66/77 · confidence 1 · eval date 2025-06-17
GPT-4o
11.2
Rank #68/77 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
27.1
Rank #73/79 · confidence 1 · eval date 2025-06-17
GPT-4o
winner33.2
Rank #68/79 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
33.6
Rank #43/59 · confidence 1 · eval date 2025-06-17
GPT-4o
winner42.0
Rank #39/59 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
54.8
Rank #51/70 · confidence 1 · eval date 2025-06-17
GPT-4o
winner62.0
Rank #37/70 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
winner1158.0
Rank #41/50 · confidence 1 · eval date 2025-06-17
GPT-4o
874.0
Rank #49/50 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
49.1
Rank #53/66 · confidence 1 · eval date 2025-06-17
GPT-4o
winner59.9
Rank #47/66 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
winner39.0
Rank #58/70 · confidence 1 · eval date 2025-06-17
GPT-4o
34.3
Rank #66/70 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
37.3
Rank #61/81 · confidence 1 · eval date 2025-06-17
GPT-4o
winner38.1
Rank #59/81 · confidence 1 · eval date 2024-05-13
Gemini 2.5 Flash
14.9
Rank #68/68 · confidence 1 · eval date 2025-06-17
GPT-4o
winner25.1
Rank #61/68 · confidence 1 · eval date 2024-05-13
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 2.5 Flash | GPT-4o |
|---|---|---|
| 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 | GPT-4o |
|---|---|---|
ChatAnywhere82 tests | Gemini 2.5 Flash speed / latency N/A / N/A input / output No data | GPT-4o speed / latency 82 tok/s / 3100ms input / output No data |
SWT-API25 tests | Gemini 2.5 Flash speed / latency 139 tok/s / 4002ms input / output No data | GPT-4o speed / latency N/A / N/A input / output No data |
CatClaw API20 tests | Gemini 2.5 Flash speed / latency 54 tok/s / 10365ms input / output No data | GPT-4o speed / latency 57 tok/s / 3381ms input / output No data |
速创API20 tests | Gemini 2.5 Flash speed / latency N/A / N/A input / output No data | GPT-4o speed / latency 88 tok/s / 1593ms input / output No data |
MN API10 tests | Gemini 2.5 Flash speed / latency N/A / N/A input / output No data | GPT-4o speed / latency 99 tok/s / 2367ms input / output No data |
This report only uses LMSpeed data for Gemini 2.5 Flash and GPT-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 2.5 Flash | GPT-4o |
|---|---|---|
| When to choose each model | Gemini 2.5 Flash Gemini 2.5 Flash is stronger when you prioritize Average speed, Provider coverage, Recent tests. | GPT-4o GPT-4o is stronger when you prioritize First-token latency. |
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 GPT-4o into nearby model comparisons with enough verified LMSpeed data.
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
