Data points: 81
The readout for GPT-4 Turbo 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
81 data points
Includes 8 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 15 high-signal samples across speed, scores, and audit health.
Model compare GPT-4 Turbo vs GPT-5.4gpt-4-turbo-vs-gpt-5-4 | Model A GPT-4 Turbo | 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 |
| Model metadata | GPT-4 Turbo exposes 128K tokens; notable signals: Text input, Image input, Text output, Tool calling. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | OpenAI | OpenAI |
| Context window | 128K tokens | 1.1M tokens |
| Max output | 4.1K tokens | 128K tokens |
| Released | Apr 2024 | Mar 2026 |
| Modalities | Input TextImage Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputText outputTool callingStructured outputsJSON mode | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2023-12-31 | No data |
| OpenRouter ID | openai/gpt-4-turbo | 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 Turbo | GPT-5.4 |
|---|---|---|
| SciCode | 31.9%#86 | 56.6%#3 |
| HLE | 3.3%#101 | 41.6%#4 |
| Input price | $10.00/M#42 | $2.50/M#37 |
| Time to first answer token | 1.66 s#38 | 134.24 s#111 |
| Output price | $30.00/M#48 | $15.00/M#44 |
| Output speed | 26.6 tok/s#108 | 92.4 tok/s#56 |
| Blended price | $15.00/M#69 | $5.63/M#63 |
| Time to first token | 1.66 s#63 | 134.24 s#110 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-4 Turbo | 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 Turbo | GPT-5.4 |
|---|---|---|
Sub2API20 tests | GPT-4 Turbo speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 51 tok/s / 4032ms input / output No data |
QQ Code10 tests | GPT-4 Turbo 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 Turbo 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 Turbo speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 51 tok/s / 1093ms input / output No data |
小水管 API10 tests | GPT-4 Turbo speed / latency 73 tok/s / 1218ms input / output No data | GPT-5.4 speed / latency 44 tok/s / 2518ms input / output No data |
GPT-4 Turbo gpt-4-turbo-2024-04-09 speed / latency No data input / output $0.411/M / $1.23/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.103/M / $0.616/M | |
GPT-4 Turbo gpt-4-turbo-preview speed / latency No data input / output $1.37/M / $4.11/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.342/M / $2.05/M |
This report only uses LMSpeed data for GPT-4 Turbo and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-4 Turbo | GPT-5.4 |
|---|---|---|
| When to choose each model | GPT-4 Turbo GPT-4 Turbo 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 81 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-4 Turbo 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.
