Data points: 74
The readout for DeepSeek V4 Flash and GPT-5, before the detailed comparison sheet.
Decision read
DeepSeek V4 Flash
DeepSeek V4 Flash currently has the stronger profile, with verified wins split 4 to 2.
Evidence depth
74 data points
Includes 8 benchmark rows, 2 audit samples, and 8 provider examples.
Selection signal
Start with DeepSeek V4 Flash
The charts below split 18 high-signal samples across speed, scores, and audit health.
Model compare DeepSeek V4 Flash vs GPT-5deepseek-v4-flash-vs-gpt-5 | Model A DeepSeek V4 Flash | Model B GPT-5 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 4 wins | 2 wins |
| Where it leads | First-token latency, Free providers, Provider coverage, Recent tests | Cheapest input price, Average speed |
| Model metadata | No OpenRouter metadata is available yet for this model. | No OpenRouter metadata is available yet for this model. |
| Developer | DeepSeek | OpenAI |
| Context window | No data | No data |
| Max output | No data | No data |
| Released | No data | No data |
| Modalities | No data | No data |
| Features | None listed | None listed |
| Parameters | No data | No data |
| Tokenizer | No data | No data |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | No data | No data |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | DeepSeek V4 Flash | GPT-5 |
|---|---|---|
| Output price | $0.280/M#4 | $10.00/M#40 |
| Input price | $0.140/M#8 | $1.25/M#29 |
| Blended price | $0.175/M#10 | $3.44/M#57 |
| GPQA | 89.4%#11 | 85.4%#31 |
| HLE | 32.1%#13 | 26.5%#24 |
| SciCode | 44.9%#23 | 42.9%#31 |
| Time to first token | 0.98 s#37 | 80.85 s#106 |
| Output speed | 92.9 tok/s#53 | 95.4 tok/s#51 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | DeepSeek V4 Flash | GPT-5 |
|---|---|---|
速创APIWinner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 92 10068100100 | GPT-5 gpt-5-all No audit yet |
小水管 APIWinner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 81 727280100 | GPT-5 gpt-5-chat-latest No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | DeepSeek V4 Flash | GPT-5 |
|---|---|---|
OpenCode20 tests | DeepSeek V4 Flash speed / latency 55 tok/s / 31496ms input / output No data | GPT-5 speed / latency N/A / N/A input / output No data |
V-API20 tests | DeepSeek V4 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 95 tok/s / 1234ms input / output No data |
小水管 API20 tests | DeepSeek V4 Flash sensenova/deepseek-v4-flash speed / latency 83 tok/s / 5114ms input / output $0/M / $0/M | GPT-5 gpt-5-chat-latest speed / latency N/A / N/A input / output $0/M / $0/M |
CatClaw API15 tests | DeepSeek V4 Flash speed / latency 42 tok/s / 3076ms input / output No data | GPT-5 speed / latency 45 tok/s / 3704ms input / output No data |
Fengsili API10 tests | DeepSeek V4 Flash speed / latency 86 tok/s / 4077ms input / output No data | GPT-5 speed / latency N/A / N/A input / output No data |
DeepSeek V4 Flash deepseek-ai/DeepSeek-V4-Flash speed / latency No data input / output $0.0027/M / $0.0027/M | GPT-5 gpt-5 speed / latency No data input / output $0.036/M / $0.285/M | |
DeepSeek V4 Flash deepseek-v4-flash speed / latency No data input / output $0.012/M / $0.024/M | GPT-5 gpt-5 speed / latency No data input / output $0.086/M / $0.685/M | |
DeepSeek V4 Flash deepseek-v4-flash speed / latency No data input / output $0.012/M / $0.024/M | GPT-5 gpt-5-chat speed / latency No data input / output $0.171/M / $1.37/M |
This report only uses LMSpeed data for DeepSeek V4 Flash and GPT-5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | DeepSeek V4 Flash | GPT-5 |
|---|---|---|
| When to choose each model | DeepSeek V4 Flash DeepSeek V4 Flash is stronger when you prioritize First-token latency, Free providers, Provider coverage, Recent tests. | GPT-5 GPT-5 is stronger when you prioritize Cheapest input price, Average speed. |
TL;DR: DeepSeek V4 Flash leads across 74 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from DeepSeek V4 Flash vs GPT-5 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.
