Data points: 56
The readout for DeepSeek Reasoner 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
56 data points
Includes 0 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 7 high-signal samples across speed, scores, and audit health.
Model compare DeepSeek Reasoner vs GPT-5.4deepseek-reasoner-vs-gpt-5-4 | Model A DeepSeek Reasoner | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 1 wins | 5 wins |
| Where it leads | Cheapest input price | Average speed, First-token latency, Free providers, Provider coverage, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | DeepSeek Reasoner | 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 | DeepSeek Reasoner | 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 | DeepSeek Reasoner | GPT-5.4 |
|---|---|---|
50 tests | DeepSeek Reasoner speed / latency N/A / N/A input / output No data |
This report only uses LMSpeed data for DeepSeek Reasoner and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | DeepSeek Reasoner | GPT-5.4 |
|---|---|---|
| When to choose each model | DeepSeek Reasoner DeepSeek Reasoner is stronger when you prioritize Cheapest input price. | GPT-5.4 GPT-5.4 is stronger when you prioritize Average speed, First-token latency, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.4 leads across 56 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from DeepSeek Reasoner vs GPT-5.4 into nearby model comparisons with enough verified LMSpeed data.
| 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 | DeepSeek | 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 |
GPT-5.4
speed / latency
50 tok/s / 7305ms
input / output
No data
星见雅 API20 tests | DeepSeek Reasoner speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 49 tok/s / 5435ms input / output No data |
|---|
Chlink API5 tests | DeepSeek Reasoner speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 50 tok/s / 5476ms input / output No data |
|---|
fffaa AI5 tests | DeepSeek Reasoner speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 56 tok/s / 2786ms input / output No data |
|---|
SmokeDivine AI5 tests | DeepSeek Reasoner speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 44 tok/s / 1119ms input / output No data |
|---|
DeepSeek Reasoner deepseek-reasoner-search speed / latency No data input / output $0.0041/M / $0.027/M | GPT-5.4 gpt-5.4-medium speed / latency No data input / output $0.014/M / $0.085/M |
DeepSeek Reasoner deepseek-reasoner speed / latency No data input / output $0.024/M / $0.096/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.034/M / $0.205/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
