Data points: 81
The readout for Gemini 3 Flash and GPT-5, before the detailed comparison sheet.
Decision read
Gemini 3 Flash
Gemini 3 Flash currently has the stronger profile, with verified wins split 5 to 1.
Evidence depth
81 data points
Includes 8 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with Gemini 3 Flash
The charts below split 18 high-signal samples across speed, scores, and audit health.
Model compare Gemini 3 Flash vs GPT-5gemini-3-flash-vs-gpt-5 | Model A Gemini 3 Flash | Model B GPT-5 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 5 wins | 1 wins |
| Where it leads | Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Gemini 3 Flash | GPT-5 |
|---|---|---|
| MMLU-Pro | 88.2%#4 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 3 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 Flash | GPT-5 |
|---|---|---|
35 tests | Gemini 3 Flash speed / latency 129 tok/s / 10293ms input / output No data |
This report only uses LMSpeed data for Gemini 3 Flash and GPT-5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 3 Flash | GPT-5 |
|---|---|---|
| When to choose each model | Gemini 3 Flash Gemini 3 Flash is stronger when you prioritize Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests. | GPT-5 GPT-5 is stronger when you prioritize First-token latency. |
TL;DR: Gemini 3 Flash leads across 81 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 3 Flash vs GPT-5 into nearby model comparisons with enough verified LMSpeed data.
| First-token latency |
| Model metadata | Gemini 3 Flash exposes 1.0M tokens; notable signals: Text input, Image input, File input, Audio input. | GPT-5 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 | Dec 2025 | Aug 2025 |
| Modalities | Input TextImageFileAudiovideo Output Text | Input FileImageText Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | No data | 2024-09-30 |
| OpenRouter ID | google/gemini-3-flash-preview | openai/gpt-5-chat |
| References | No data | No data |
| LiveCodeBench | 79.7%#19 | 84.6%#11 |
|---|
| SciCode | 49.9%#13 | 42.9%#31 |
|---|
| Output speed | 190.4 tok/s#14 | 109.6 tok/s#44 |
|---|
| Input price | $0.500/M#18 | $1.25/M#30 |
|---|
| HLE | 14.1%#55 | 26.5%#24 |
|---|
| Output price | $3.00/M#28 | $10.00/M#41 |
|---|
| GPQA | 81.2%#52 | 85.4%#31 |
|---|
GPT-5
speed / latency
45 tok/s / 3704ms
input / output
No data
N1N25 tests | Gemini 3 Flash speed / latency 157 tok/s / 7994ms input / output No data | GPT-5 speed / latency 102 tok/s / 948ms input / output No data |
|---|
V-API20 tests | Gemini 3 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 95 tok/s / 1234ms input / output No data |
|---|
Hi API10 tests | Gemini 3 Flash speed / latency 118 tok/s / 9594ms input / output No data | GPT-5 speed / latency N/A / N/A input / output No data |
|---|
Rnglg2 API10 tests | Gemini 3 Flash speed / latency 160 tok/s / 6933ms input / output No data | GPT-5 speed / latency N/A / N/A input / output No data |
|---|
Gemini 3 Flash google/gemini-3-flash speed / latency No data input / output $0/M / $0/M | GPT-5 gpt-5-openai-compact speed / latency No data input / output $75.00/M / $600.00/M |
Gemini 3 Flash gemini-3-flash-preview-c speed / latency No data input / output $0.0068/M / $0.0068/M | GPT-5 gpt-5-chat-latest speed / latency No data input / output $0.274/M / $2.19/M |
Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.0096/M / $0.059/M | GPT-5 gpt-5 speed / latency No data input / output $0.147/M / $1.17/M |
Gemini 3 Flash gemini-3-flash-preview-c speed / latency No data input / output $0.016/M / $0.016/M | GPT-5 gpt-5-chat-latest speed / latency No data input / output $1.25/M / $10.00/M |
Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.020/M / $0.124/M | GPT-5 gpt-5 speed / latency No data input / output $0.360/M / $2.88/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
