Data points: 85
The readout for Gemini 3 Flash and GPT-5.4, before the detailed comparison sheet.
Decision read
GPT-5.4
GPT-5.4 currently has the stronger profile, with verified wins split 2 to 4.
Evidence depth
85 data points
Includes 8 benchmark rows, 1 audit samples, and 10 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 19 high-signal samples across speed, scores, and audit health.
Model compare Gemini 3 Flash vs GPT-5.4gemini-3-flash-vs-gpt-5-4 | Model A Gemini 3 Flash | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 2 wins | 4 wins |
| Where it leads | Cheapest input price, Average speed | First-token latency, Free providers, Provider coverage, Recent tests |
| Model metadata | Gemini 3 Flash exposes 1.0M tokens; notable signals: Text input, Image input, File input, Audio input. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | OpenAI | |
| Context window | 1.0M tokens | 1.1M tokens |
| Max output | 65.5K tokens | 128K tokens |
| Released | Dec 2025 | Mar 2026 |
| Modalities | Input TextImageFileAudiovideo Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | google/gemini-3-flash-preview | openai/gpt-5.4 |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Gemini 3 Flash | GPT-5.4 |
|---|---|---|
| GPQA | 81.2%#52 | 92.0%#3 |
| SciCode | 49.9%#13 | 56.6%#3 |
| HLE | 14.1%#55 | 41.6%#4 |
| Output speed | 190.4 tok/s#14 | 92.4 tok/s#56 |
| Input price | $0.500/M#18 | $2.50/M#37 |
| Output price | $3.00/M#28 | $15.00/M#44 |
| Blended price | $1.13/M#42 | $5.63/M#63 |
| Time to first answer token | 4.95 s#49 | 134.24 s#111 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 3 Flash | GPT-5.4 |
|---|---|---|
钠 APIWinner: GPT-5.4 | Gemini 3 Flash gemini-3-flash-preview No audit yet | GPT-5.4 gpt-5.4 Audit score 90 1008476100 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Gemini 3 Flash | GPT-5.4 |
|---|---|---|
天宫造物60 tests | Gemini 3 Flash speed / latency 12 tok/s / 2615ms input / output No data | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data |
CatClaw API30 tests | Gemini 3 Flash speed / latency 129 tok/s / 10293ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
N1N20 tests | Gemini 3 Flash speed / latency 157 tok/s / 7994ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
6345ywz API15 tests | Gemini 3 Flash speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 41 tok/s / 6581ms input / output No data |
VSLLM15 tests | Gemini 3 Flash speed / latency 166 tok/s / 4340ms input / output No data | GPT-5.4 speed / latency 60 tok/s / 2482ms input / output No data |
Gemini 3 Flash google/gemini-3-flash speed / latency No data input / output $0/M / $0/M | GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $75.00/M / $450.00/M | |
Gemini 3 Flash gemini-3-flash-preview群友免费 speed / latency No data input / output $0/M / $0/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $17.86/M / $107.14/M | |
Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.0010/M / $0.0010/M | GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $0.0010/M / $0.0010/M | |
Gemini 3 Flash gemini-3-flash-preview-c speed / latency No data input / output $0.0050/M / $0.0050/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.450/M / $2.70/M | |
Gemini 3 Flash gemini-3-flash-preview speed / latency No data input / output $0.0050/M / $0.0050/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $2.50/M / $15.00/M |
This report only uses LMSpeed data for Gemini 3 Flash and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 3 Flash | GPT-5.4 |
|---|---|---|
| When to choose each model | Gemini 3 Flash Gemini 3 Flash is stronger when you prioritize Cheapest input price, Average speed. | GPT-5.4 GPT-5.4 is stronger when you prioritize First-token latency, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.4 leads across 85 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 3 Flash vs GPT-5.4 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.
