DeepSeek V4 Flash 0731 vs GLM 5.3 Flash
API pricing, context, and independently measured performance, side by side. DeepSeek V4 Flash 0731 starts 65% cheaper on input than GLM 5.3 Flash at list prices.
DeepSeek V4 Flash 0731
DeepSeek · released Jul 31, 2026
Best input$0.004 / MTok
Best output$0.18 / MTok
Context1.05M
Providers29
Fastest measured0.38s° TTFT · 265 tok/s
Open weightsToolsReasoningStructured outputPrompt caching
GLM 5.3 Flash
Z.ai · released Aug 26, 2026
Best input$0.013 / MTok
Best output$0.145 / MTok
Context1.05M
Providers37
Fastest measured0.54s° TTFT · 59 tok/s
Open weightsVisionToolsReasoningStructured outputPrompt caching
Cheapest providers, measuredUSD / MTOK
| MODEL | PROVIDER | INPUT | OUTPUT | TTFT | TPS | SMOKE |
|---|---|---|---|---|---|---|
| DeepSeek V4 Flash 0731 | OPOpenInference | $0.004 | $0.576 | 5.3s° | 15° tok/s | 3/5 |
| DeepSeek V4 Flash 0731 |  Relace | $0.005 | $0.64 | 0.7s° | 127° tok/s | 5/5 |
| DeepSeek V4 Flash 0731 | SRSail Research | $0.019 | $0.42 | 2s° | 35° tok/s | 5/5 |
| GLM 5.3 Flash | OPOpenInference | $0.013 | $1.13 | 2.6s° | 47° tok/s | — |
| GLM 5.3 Flash | Relace | $0.014 | $0.813 | 0.86s° | 134° tok/s | — |
| GLM 5.3 Flash |  Morph | $0.031 | $1.00 | — | — | — |
TTFT/TPS: ModelIndex-measured medians (P50, trailing 21d) · chat10k profile (~10K in / 200 out) · ° = measured via OpenRouter routing (adds a hop) · SMOKE: of 5 programmatic capability probes passed · methodology v1.1 — full details on each model page