Data points: 91
The readout for GPT-4o 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
91 data points
Includes 8 benchmark rows, 1 audit samples, and 10 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 19 high-signal samples across speed, scores, and audit health.
Model compare GPT-4o vs GPT-5.4gpt-4o-vs-gpt-5-4 | Model A GPT-4o | 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-4o exposes 128K 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 | 128K tokens | 1.1M tokens |
| Max output | 16.4K tokens | 128K tokens |
| Released | Nov 2024 | Mar 2026 |
| Modalities | Input TextImageFile Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeWeb search | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2023-10-31 | No data |
| OpenRouter ID | openai/gpt-4o-2024-11-20 | 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-4o | GPT-5.4 |
|---|---|---|
| GPQA | 54.3%#114 | 92.0%#3 |
| SciCode | 33.3%#82 | 56.6%#3 |
| HLE | 3.3%#101 | 41.6%#4 |
| Time to first answer token | 0.51 s#8 | 134.24 s#111 |
| Time to first token | 0.51 s#11 | 134.24 s#110 |
| Input price | $2.50/M#37 | $2.50/M#37 |
| Output speed | 125.9 tok/s#39 | 92.4 tok/s#56 |
| Output price | $10.00/M#41 | $15.00/M#44 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-4o | GPT-5.4 |
|---|---|---|
钠 APIWinner: GPT-5.4 | GPT-4o gpt-4o Audit score 76 72727088 | 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 | GPT-4o | GPT-5.4 |
|---|---|---|
速创API25 tests | GPT-4o speed / latency 88 tok/s / 1593ms input / output No data | GPT-5.4 speed / latency 50 tok/s / 1423ms input / output No data |
Sub2API20 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 51 tok/s / 4032ms input / output No data |
Sub2API20 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 34 tok/s / 1748ms input / output No data |
CatClaw API10 tests | GPT-4o speed / latency 57 tok/s / 3381ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
Fengsili API10 tests | GPT-4o speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 88 tok/s / 6075ms input / output No data |
GPT-4o gpt-4o-all-c speed / latency No data input / output $0.0082/M / $0.0082/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $9.25/M / $55.48/M | |
GPT-4o gpt-4o-all speed / latency No data input / output $0.0082/M / $0.0082/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0.342/M / $2.05/M | |
GPT-4o gpt-4o-all speed / latency No data input / output $0.0082/M / $0.0082/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0.342/M / $2.05/M | |
GPT-4o gpt-4o-2024-05-13 speed / latency No data input / output $0.012/M / $0.012/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0.514/M / $3.08/M | |
GPT-4o gpt-4o-2024-05-13 speed / latency No data input / output $0.016/M / $0.016/M | GPT-5.4 gpt-5.4-2026-03-05 speed / latency No data input / output $0.685/M / $4.11/M |
This report only uses LMSpeed data for GPT-4o and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-4o | GPT-5.4 |
|---|---|---|
| When to choose each model | GPT-4o GPT-4o 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 91 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-4o 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.
