Data points: 64
The readout for GPT-5.3 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
64 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-5.3 vs GPT-5.4gpt-5-3-vs-gpt-5-4 | Model A GPT-5.3 | 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-5.3 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 | Mar 2026 | Mar 2026 |
| Modalities | Input TextImageFile 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 | No data | No data |
| OpenRouter ID | openai/gpt-5.3-chat | 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-5.3 | 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-5.3 | 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-5.3 | GPT-5.4 |
|---|---|---|
小水管 API15 tests | GPT-5.3 speed / latency 64 tok/s / 2635ms input / output No data | GPT-5.4 speed / latency 44 tok/s / 2518ms input / output No data |
Omini Api10 tests | GPT-5.3 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 51 tok/s / 1443ms input / output No data |
CaMeL AI5 tests | GPT-5.3 speed / latency 51 tok/s / 2246ms input / output No data | GPT-5.4 speed / latency N/A / N/A input / output No data |
Codex API5 tests | GPT-5.3 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 53 tok/s / 3208ms input / output No data |
GuaiHub5 tests | GPT-5.3 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 70 tok/s / 2961ms input / output No data |
GPT-5.3 gpt-5.3-chat-latest speed / latency No data input / output $0.072/M / $0.575/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.103/M / $0.616/M | |
GPT-5.3 gpt-5-3 speed / latency No data input / output $0.080/M / $0.080/M | GPT-5.4 gpt-5-4 speed / latency No data input / output $0.080/M / $0.080/M | |
GPT-5.3 gpt-5-3 speed / latency No data input / output $0.137/M / $1.10/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.411/M / $2.47/M |
This report only uses LMSpeed data for GPT-5.3 and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5.3 | GPT-5.4 |
|---|---|---|
| When to choose each model | GPT-5.3 GPT-5.3 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 64 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5.3 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.
