Data points: 54
The readout for GPT-4.5 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 0 to 4.
Evidence depth
54 data points
Includes 0 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 8 high-signal samples across speed, scores, and audit health.
Model compare GPT-4.5 vs GPT-5.4gpt-4-5-vs-gpt-5-4 | Model A GPT-4.5 | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 0 wins | 4 wins |
| Where it leads | No data | Cheapest input price, Free providers, Provider coverage, Recent tests |
| Model metadata | No OpenRouter metadata is available yet for this model. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | OpenAI | OpenAI |
| Context window | No data | 1.1M tokens |
| Max output | No data | 128K tokens |
| Released | No data | Mar 2026 |
| Modalities | No data | Input TextImageFile Output Text |
| Features | None listed | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | No data | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | No data | 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-4.5 | GPT-5.4 |
|---|---|---|
| No shared benchmark metrics are available yet. | ||
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-4.5 | 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-4.5 | GPT-5.4 |
|---|---|---|
Sub2API20 tests | GPT-4.5 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-4.5 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-4.5 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-4.5 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 51 tok/s / 1093ms input / output No data |
微雨API10 tests | GPT-4.5 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 37 tok/s / 1721ms input / output No data |
GPT-4.5 gpt-4.5-preview-2025-02-27 speed / latency No data input / output $3.08/M / $6.16/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.103/M / $0.616/M | |
GPT-4.5 gpt-4.5-preview-2025-02-27 speed / latency No data input / output $10.27/M / $20.55/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.342/M / $2.05/M | |
GPT-4.5 gpt-4.5-preview speed / latency No data input / output $10.27/M / $20.55/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-4.5 and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-4.5 | GPT-5.4 |
|---|---|---|
| When to choose each model | GPT-4.5 GPT-4.5 does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. | 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 54 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-4.5 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.
