API cost decision in 10 seconds
GLM 5.3 FlashX vs DeepSeek V4 Flash Latest
Pick DeepSeek V4 Flash Latest when budget is the priority.
Pricing data updated:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick DeepSeek V4 Flash Latest when budget is the priority.
On the standard 1M input plus 500K output workload, DeepSeek V4 Flash Latest is estimated at $0.21 vs $0.99 for GLM 5.3 FlashX, saving $0.79 (79% lower).
Cost-first pickDeepSeek V4 Flash Latest
Context-first pickTie
Sample savings$0.7979%
10x traffic gap$7.86
The reported context window is tied, so cost and provider fit carry more weight. At 10x that traffic, the same price gap is about $7.86. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
DeepSeek V4 Flash Latest stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | GLM 5.3 FlashX | DeepSeek V4 Flash Latest |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | DeepSeek V4 Flash Latest | $2.48 | $0.44 |
| Balanced workload | 1M input + 1M output | DeepSeek V4 Flash Latest | $1.62 | $0.36 |
| Output-heavy chatbot | 1M input + 5M output | DeepSeek V4 Flash Latest | $6.62 | $1.56 |
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
DeepSeek V4 Flash Latest has the lower input price, DeepSeek V4 Flash Latest has the lower output price, and Tie offers the larger context window.
For a 1M input token plus 500K output token workload, the estimated API cost is $0.99 for GLM 5.3 FlashX and $0.21 for DeepSeek V4 Flash Latest.
Choose GLM 5.3 FlashX when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
Choose DeepSeek V4 Flash Latest when you care most about lower input-token price, and lower output-token price.
| Feature | GLM 5.3 FlashX (Z.ai) | DeepSeek V4 Flash Latest (DeepSeek) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.37 | $0.06 |
| Completion Price per 1M tokens | $1.25 | $0.3 |
| Sample Workload Cost 1M input + 500K output | $0.99 | $0.21 |
| Context Window | 1.05M | 1.05M |
| Release Date | 2026-09-18 | 2026-08-01 |
GLM-5.3-FlashX is the high-speed variant of Z.ai's GLM-5.3-Flash, a native multimodal model delivering inference speeds of up to 200 tokens/s. Built on the same hybrid sparse and linear attention architecture...
This model always redirects to the latest model in the DeepSeek V4 Flash family.
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | DeepSeek V4 Flash Latest | On the standard 1M input plus 500K output workload, DeepSeek V4 Flash Latest is estimated at $0.21 vs $0.99 for GLM 5.3 FlashX, saving $0.79 (79% lower). |
| High-volume input processing | DeepSeek V4 Flash Latest | Lower prompt-token price matters most when prompts or retrieved passages dominate the bill. |
| Long responses and chatbots | DeepSeek V4 Flash Latest | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Tie | A larger context window leaves more room for retrieved passages and source files. |