Data points: 86
The readout for Gemini 2.5 Flash Lite 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
86 data points
Includes 8 benchmark rows, 1 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 17 high-signal samples across speed, scores, and audit health.
Model compare Gemini 2.5 Flash Lite vs GPT-5.4gemini-2-5-flash-lite-vs-gpt-5-4 | Model A Gemini 2.5 Flash Lite | Model B GPT-5.4 |
|---|---|---|
| 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 | Gemini 2.5 Flash Lite 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 | Sep 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 | 2025-01-31 | No data |
| OpenRouter ID | google/gemini-2.5-flash-lite-preview-09-2025 | 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 2.5 Flash Lite | GPT-5.4 |
|---|---|---|
| Time to first answer token | 0.37 s#2 | 134.24 s#111 |
| GPQA | 47.4%#122 | 92.0%#3 |
| SciCode | 17.7%#112 | 56.6%#3 |
| Time to first token | 0.37 s#3 | 134.24 s#110 |
| HLE | 3.7%#98 | 41.6%#4 |
| Input price | $0.100/M#6 | $2.50/M#37 |
| Output price | $0.400/M#6 | $15.00/M#44 |
| Output speed | 229.0 tok/s#7 | 92.4 tok/s#56 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 2.5 Flash Lite | GPT-5.4 |
|---|---|---|
钠 APIWinner: GPT-5.4 | Gemini 2.5 Flash Lite gemini-2.5-flash-lite 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 2.5 Flash Lite | GPT-5.4 |
|---|---|---|
SkyAI60 tests | Gemini 2.5 Flash Lite speed / latency 276 tok/s / 1323ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
天宫造物50 tests | Gemini 2.5 Flash Lite speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data |
Rnglg2 API30 tests | Gemini 2.5 Flash Lite speed / latency 235 tok/s / 2518ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
GankInterview LLM15 tests | Gemini 2.5 Flash Lite speed / latency 262 tok/s / 904ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
WSocket AI15 tests | Gemini 2.5 Flash Lite speed / latency 209 tok/s / 1627ms input / output No data | GPT-5.4 speed / latency 36 tok/s / 12157ms input / output No data |
Gemini 2.5 Flash Lite gemini-2.5-flash-lite-c speed / latency No data input / output $0.0035/M / $0.0035/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.450/M / $2.70/M | |
Gemini 2.5 Flash Lite gemini-2.5-flash-lite-preview-09-2025 speed / latency No data input / output $0.0041/M / $0.016/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.103/M / $0.616/M | |
Gemini 2.5 Flash Lite gemini-2.5-flash-lite-nothinking speed / latency No data input / output $0.0086/M / $0.034/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.429/M / $3.43/M |
This report only uses LMSpeed data for Gemini 2.5 Flash Lite and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 2.5 Flash Lite | GPT-5.4 |
|---|---|---|
| When to choose each model | Gemini 2.5 Flash Lite Gemini 2.5 Flash Lite is stronger when you prioritize Average speed, First-token latency. | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.4 leads across 86 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 2.5 Flash Lite 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.
