Data points: 80
The readout for GPT-4.1 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
80 data points
Includes 8 benchmark rows, 0 audit samples, and 9 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 GPT-4.1 vs GPT-5.4gpt-4-1-vs-gpt-5-4 | Model A GPT-4.1 | 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 | GPT-4.1 exposes 1.0M tokens; notable signals: Text input, Image input, File input, Text output. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | OpenAI | OpenAI |
| Context window | 1.0M tokens | 1.1M tokens |
| Max output | No data | 128K tokens |
| Released | Apr 2025 | Mar 2026 |
| Modalities | Input ImageTextFile Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2024-06-30 | No data |
| OpenRouter ID | openai/gpt-4.1 | 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 | GPT-4.1 | GPT-5.4 |
|---|---|---|
| GPQA | 66.6%#90 | 92.0%#3 |
| SciCode | 38.1%#58 | 56.6%#3 |
| HLE | 4.6%#90 | 41.6%#4 |
| Time to first answer token | 0.64 s#17 | 134.24 s#111 |
| Time to first token | 0.64 s#21 | 134.24 s#110 |
| Input price | $2.00/M#36 | $2.50/M#37 |
| Output speed | 129.4 tok/s#37 | 92.4 tok/s#56 |
| Output price | $8.00/M#40 | $15.00/M#44 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-4.1 | GPT-5.4 |
|---|---|---|
| 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 | GPT-4.1 | GPT-5.4 |
|---|---|---|
SWT-API120 tests | GPT-4.1 speed / latency 81 tok/s / 1822ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
Sub2API20 tests | GPT-4.1 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 51 tok/s / 4032ms input / output No data |
Fengsili API10 tests | GPT-4.1 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 88 tok/s / 6075ms input / output No data |
QQ Code10 tests | GPT-4.1 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 55 tok/s / 2903ms input / output No data |
Sub2API10 tests | GPT-4.1 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 54 tok/s / 1369ms input / output No data |
GPT-4.1 gpt-4.1 speed / latency No data input / output $0.027/M / $0.110/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.034/M / $0.205/M | |
GPT-4.1 gpt-4.1-2025-04-14 speed / latency No data input / output $0.082/M / $0.329/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.103/M / $0.616/M | |
GPT-4.1 gpt-4.1 speed / latency No data input / output $0.137/M / $0.548/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.171/M / $1.03/M | |
GPT-4.1 gpt-4.1 speed / latency No data input / output $0.171/M / $0.686/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 GPT-4.1 and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-4.1 | GPT-5.4 |
|---|---|---|
| When to choose each model | GPT-4.1 GPT-4.1 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 80 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-4.1 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.
