Data points: 78
The readout for DeepSeek V3.1 Terminus and GPT-5.4, before the detailed comparison sheet.
Decision read
Tie
Tie currently has the stronger profile, with verified wins split 3 to 3.
Evidence depth
78 data points
Includes 6 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Tie
The charts below split 15 high-signal samples across speed, scores, and audit health.
Model compare DeepSeek V3.1 Terminus vs GPT-5.4deepseek-v3-1-terminus-vs-gpt-5-4 | Model A DeepSeek V3.1 Terminus | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Tie | Tie |
| Verified metric wins | 3 wins | 3 wins |
| Where it leads | Average speed, First-token latency, Free providers | Cheapest input price, Provider coverage, Recent tests |
| Model metadata | DeepSeek V3.1 Terminus exposes 163.8K tokens; notable signals: Text input, Text output, Tool calling, Structured outputs. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | DeepSeek | OpenAI |
| Context window | 163.8K tokens | 1.1M tokens |
| Max output | 32.8K tokens | 128K tokens |
| Released | Sep 2025 | Mar 2026 |
| Modalities | Input Text Output Text | Input TextImageFile Output Text |
| Features | Text inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | DeepSeek | GPT |
| Knowledge cutoff | 2025-03-31 | No data |
| OpenRouter ID | deepseek/deepseek-v3.1-terminus | 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 | DeepSeek V3.1 Terminus | GPT-5.4 |
|---|---|---|
| GPQA | 75.1%#68 | 92.0%#3 |
| SciCode | 32.1%#85 | 56.6%#3 |
| HLE | 8.4%#70 | 41.6%#4 |
| Input price | $0.270/M#13 | $2.50/M#37 |
| Output price | $1.00/M#17 | $15.00/M#44 |
| Blended price | $0.453/M#22 | $5.63/M#63 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | DeepSeek V3.1 Terminus | 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 V3.1 Terminus | GPT-5.4 |
|---|---|---|
天宫造物50 tests | DeepSeek V3.1 Terminus speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data |
星见雅 API25 tests | DeepSeek V3.1 Terminus speed / latency 23 tok/s / 1008ms input / output No data | GPT-5.4 speed / latency 49 tok/s / 5435ms input / output No data |
6345ywz API15 tests | DeepSeek V3.1 Terminus speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 41 tok/s / 6581ms input / output No data |
Fengsili API10 tests | DeepSeek V3.1 Terminus speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 88 tok/s / 6075ms input / output No data |
GGBand API10 tests | DeepSeek V3.1 Terminus speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 61 tok/s / 3483ms input / output No data |
DeepSeek V3.1 Terminus deepseek-v3.1-terminus speed / latency No data input / output $0.010/M / $0.010/M | GPT-5.4 gpt-5.4-high speed / latency No data input / output $0.050/M / $0.050/M | |
DeepSeek V3.1 Terminus deepseek-v3.1-terminus speed / latency No data input / output $0.018/M / $0.068/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.171/M / $1.03/M | |
DeepSeek V3.1 Terminus deepseek-v3.1-terminus speed / latency No data input / output $0.020/M / $0.040/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.020/M / $0.120/M | |
DeepSeek V3.1 Terminus vanchin/deepseek-v3.1-terminus speed / latency No data input / output $0.050/M / $0.050/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.400/M / $2.40/M |
This report only uses LMSpeed data for DeepSeek V3.1 Terminus and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | DeepSeek V3.1 Terminus | GPT-5.4 |
|---|---|---|
| When to choose each model | DeepSeek V3.1 Terminus DeepSeek V3.1 Terminus is stronger when you prioritize Average speed, First-token latency, Free providers. | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Provider coverage, Recent tests. |
TL;DR: Tie leads across 78 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from DeepSeek V3.1 Terminus 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.
