Data points: 66
The readout for Gemini 1.5 Flash and GPT-5.2, before the detailed comparison sheet.
Decision read
GPT-5.2
GPT-5.2 currently has the stronger profile, with verified wins split 2 to 4.
Evidence depth
66 data points
Includes 5 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.2
The charts below split 13 high-signal samples across speed, scores, and audit health.
Model compare Gemini 1.5 Flash vs GPT-5.2gemini-1-5-flash-vs-gpt-5-2 | Model A Gemini 1.5 Flash | Model B GPT-5.2 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 2 wins | 4 wins |
| Where it leads | Average speed, First-token latency | Cheapest input price, Free providers, Provider coverage, Recent tests |
| Model metadata | No OpenRouter metadata is available yet for this model. | GPT-5.2 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | OpenAI | |
| Context window | No data | 128K tokens |
| Max output | No data | 16.4K tokens |
| Released | No data | Dec 2025 |
| Modalities | No data | Input FileImageText Output Text |
| Features | None listed | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | No data | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | No data | openai/gpt-5.2-chat |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Gemini 1.5 Flash | GPT-5.2 |
|---|---|---|
| LiveCodeBench | 27.3%#82 | 88.9%#4 |
| MMLU-Pro | 68.0%#70 | 87.4%#6 |
| GPQA | 46.3%#124 | 90.3%#9 |
| HLE | 3.5%#100 | 35.4%#9 |
| SciCode | 26.7%#97 | 52.1%#9 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 1.5 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 1.5 Flash | GPT-5.2 |
|---|---|---|
V-API15 tests | Gemini 1.5 Flash speed / latency 163 tok/s / 1183ms input / output No data | GPT-5.2 speed / latency N/A / N/A input / output No data |
丸美小沐15 tests | Gemini 1.5 Flash speed / latency 236 tok/s / 1159ms input / output No data | GPT-5.2 speed / latency N/A / N/A input / output No data |
Yun API5 tests | Gemini 1.5 Flash speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 32 tok/s / 1965ms input / output No data |
AIGCBAR0 tests | Gemini 1.5 Flash speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency N/A / N/A input / output No data |
AIO通用智能服务平台0 tests | Gemini 1.5 Flash speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency N/A / N/A input / output No data |
Gemini 1.5 Flash gemini-1.5-flash-latest speed / latency No data input / output $0.0033/M / $0.013/M | GPT-5.2 gpt-5.2-medium speed / latency No data input / output $0.024/M / $0.192/M | |
Gemini 1.5 Flash gemini-1.5-flash-8b speed / latency No data input / output $0.040/M / $0.160/M | GPT-5.2 gpt-5.2-chat-latest speed / latency No data input / output $1.75/M / $14.00/M | |
Gemini 1.5 Flash gemini-1.5-flash speed / latency No data input / output $0.096/M / $0.384/M | GPT-5.2 gpt-5.2 speed / latency No data input / output $0.240/M / $1.92/M |
This report only uses LMSpeed data for Gemini 1.5 Flash and GPT-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 1.5 Flash | GPT-5.2 |
|---|---|---|
| When to choose each model | Gemini 1.5 Flash Gemini 1.5 Flash is stronger when you prioritize Average speed, First-token latency. | GPT-5.2 GPT-5.2 is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.2 leads across 66 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 1.5 Flash vs GPT-5.2 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.
