Data points: 77
The readout for GPT-4 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 1 to 5.
Evidence depth
77 data points
Includes 6 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 14 high-signal samples across speed, scores, and audit health.
Model compare GPT-4 vs GPT-5.4gpt-4-vs-gpt-5-4 | Model A GPT-4 | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 1 wins | 5 wins |
| Where it leads | First-token latency | 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 | GPT-4 | GPT-5.4 |
|---|---|---|
| Time to first answer token | 1.07 s#25 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-4 | 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 | GPT-5.4 |
|---|---|---|
20 tests | GPT-4 speed / latency N/A / N/A input / output No data | GPT-5.4 |
This report only uses LMSpeed data for GPT-4 and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-4 | GPT-5.4 |
|---|---|---|
| When to choose each model | GPT-4 GPT-4 is stronger when you prioritize First-token latency. | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.4 leads across 77 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-4 vs GPT-5.4 into nearby model comparisons with enough verified LMSpeed data.
| Model metadata | GPT-4 exposes 8.2K tokens; notable signals: Text input, Text output, Tool calling, Structured outputs. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context window | 8.2K tokens | 1.1M tokens |
| Max output | 4.1K tokens | 128K tokens |
| Released | May 2023 | Mar 2026 |
| Modalities | Input Text Output Text | Input TextImageFile Output Text |
| Features | Text inputText outputTool callingStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2021-09-30 | No data |
| OpenRouter ID | openai/gpt-4 | openai/gpt-5.4 |
| References | No data | No data |
| Input price | $30.00/M#46 | $2.50/M#37 |
|---|
| Time to first token | 1.07 s#40 | 134.24 s#110 |
|---|
| Output price | $60.00/M#50 | $15.00/M#44 |
|---|
| Output speed | 39.3 tok/s#101 | 92.4 tok/s#56 |
|---|
| Blended price | $37.50/M#75 | $5.63/M#63 |
|---|
speed / latency
51 tok/s / 4032ms
input / output
No data
Sub2API20 tests | GPT-4 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 34 tok/s / 1748ms input / output No data |
|---|
QQ Code10 tests | GPT-4 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 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 54 tok/s / 1369ms input / output No data |
|---|
Sub2API10 tests | GPT-4 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 51 tok/s / 1093ms input / output No data |
|---|
GPT-4 gpt-4-all speed / latency No data input / output $0.014/M / $0.014/M | GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $4.11/M / $24.66/M |
GPT-4 gpt-4-all speed / latency No data input / output $0.014/M / $0.014/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0.342/M / $2.05/M |
GPT-4 gpt-4-all speed / latency No data input / output $0.014/M / $0.014/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0.342/M / $2.05/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
