Data points: 71
The readout for Gemini 1.5 Flash and GPT-5, before the detailed comparison sheet.
Decision read
Tie
Tie currently has the stronger profile, with verified wins split 3 to 3.
Evidence depth
71 data points
Includes 7 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Tie
The charts below split 14 high-signal samples across speed, scores, and audit health.
Model compare Gemini 1.5 Flash vs GPT-5gemini-1-5-flash-vs-gpt-5 | Model A Gemini 1.5 Flash | Model B GPT-5 |
|---|---|---|
| Overall leader | Tie | Tie |
| Verified metric wins | 3 wins | 3 wins |
| Where it leads | Cheapest input price, Average speed, First-token latency | Free providers, Provider coverage, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Gemini 1.5 Flash | GPT-5 |
|---|---|---|
| AIME | 18.0%#40 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 1.5 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 1.5 Flash | GPT-5 |
|---|---|---|
35 tests | Gemini 1.5 Flash speed / latency 163 tok/s / 1183ms input / output No data |
This report only uses LMSpeed data for Gemini 1.5 Flash and GPT-5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 1.5 Flash | GPT-5 |
|---|---|---|
| When to choose each model | Gemini 1.5 Flash Gemini 1.5 Flash is stronger when you prioritize Cheapest input price, Average speed, First-token latency. | GPT-5 GPT-5 is stronger when you prioritize Free providers, Provider coverage, Recent tests. |
TL;DR: Tie leads across 71 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 1.5 Flash vs GPT-5 into nearby model comparisons with enough verified LMSpeed data.
| Model metadata | No OpenRouter metadata is available yet for this model. | GPT-5 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 | Aug 2025 |
| Modalities | No data | Input FileImageText Output Text |
| Features | None listed | Text inputImage inputFile inputText outputStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | No data | GPT |
| Knowledge cutoff | No data | 2024-09-30 |
| OpenRouter ID | No data | openai/gpt-5-chat |
| References | No data | No data |
| MATH-500 | 82.7%#40 | 99.4%#1 |
|---|
| MMLU-Pro | 68.0%#70 | 87.1%#7 |
|---|
| LiveCodeBench | 27.3%#82 | 84.6%#11 |
|---|
| HLE | 3.5%#100 | 26.5%#24 |
|---|
| GPQA | 46.3%#124 | 85.4%#31 |
|---|
| SciCode | 26.7%#97 | 42.9%#31 |
|---|
GPT-5
speed / latency
95 tok/s / 1234ms
input / output
No data
AIGCBAR0 tests | Gemini 1.5 Flash speed / latency N/A / N/A input / output No data | GPT-5 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 speed / latency N/A / N/A input / output No data |
|---|
CHB API0 tests | Gemini 1.5 Flash gemini-1.5-flash-latest speed / latency N/A / N/A input / output $0.0033/M / $0.013/M | GPT-5 gpt-5-2025-08-07 speed / latency N/A / N/A input / output $0.034/M / $0.274/M |
|---|
Crond0 tests | Gemini 1.5 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency N/A / N/A input / output No data |
|---|
Gemini 1.5 Flash gemini-1.5-flash-8b speed / latency No data input / output $0.040/M / $0.160/M | GPT-5 gpt-5-medium speed / latency No data input / output $1.25/M / $10.00/M |
Gemini 1.5 Flash gemini-1.5-flash-8b speed / latency No data input / output $0.075/M / $0.300/M | GPT-5 openai/gpt-5-chat speed / latency No data input / output $75.00/M / $75.00/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
