DeepSeek V4.1 Flash vs GLM 5.2
API pricing, context, and independently measured performance, side by side. DeepSeek V4.1 Flash starts 82% cheaper on input than GLM 5.2 at list prices.
DeepSeek V4.1 Flash
DeepSeek · released Sep 10, 2026
Best input$0.10 / MTok
Best output$0.42 / MTok
Context1.05M
Providers28
Fastest measured0.64s° TTFT · 281 tok/s
Open weightsVisionToolsReasoningStructured outputPrompt caching
GLM 5.2
Z.ai · released Jun 16, 2026
Best input$0.561 / MTok
Best output$1.76 / MTok
Context1.05M
Providers31
Fastest measured0.61s° TTFT · 593 tok/s
Open weightsToolsReasoningStructured outputPrompt caching
Cheapest providers, measuredUSD / MTOK
| MODEL | PROVIDER | INPUT | OUTPUT | TTFT | TPS | SMOKE |
|---|---|---|---|---|---|---|
| DeepSeek V4.1 Flash | OPOpenInference | $0.10 | $0.50 | 5s° | 10° tok/s | — |
| DeepSeek V4.1 Flash |  Relace | $0.10 | $0.50 | — | — | — |
| DeepSeek V4.1 Flash | DEDekaLLM | $0.10 | $1.00 | — | — | — |
| GLM 5.2 |  Baidu | $0.561 | $1.76 | 0.77s° | 90° tok/s | 3/5 |
| GLM 5.2 |  DeepInfra | $0.563 | $1.80 | 1.2s° | 71° tok/s | — |
| GLM 5.2 |  StreamLake | $0.641 | $2.01 | 1s° | 55° tok/s | 2/5 |
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