DeepSeek V4.1 Flash vs Z.ai GLM 5.3 Flash
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- DeepSeek V4.1 Flash is 1.1× cheaper at a typical mix of 3 input tokens per output token.
- Both accept prompts up to 1M tokens.
- DeepSeek V4.1 Flash output costs $0.18 per 1M via Decart, against the list price of $0.42.
- GLM 5.3 Flash output costs $0.043 per 1M via OpenInference, against the list price of $0.50.
- GLM 5.3 Flash is rated 29 points higher on the chess arena.
| DeepSeek V4.1 Flash | GLM 5.3 Flash | |
|---|---|---|
| Vendor | DeepSeek | Z.ai |
| Released | 2026-09-10 | 2026-08-26 |
| Input / 1M | $0.14 | $0.15 |
| Output / 1M | $0.42 | $0.50 |
| Cached input / 1M | $0.0042 | $0.03 |
| Blended / 1M (3:1) | $0.21 | $0.237 |
| Context | 1M | 1M |
| Max output | 131K | 944K |
| Accepts | text, image | text, image, video |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 41 | 38 |
| Cheapest provider, output | $0.18 | $0.043 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | 1468 ±79 | 1497 ±86 |
| Vendor API status | Operational | — |
Cost calculator
DeepSeek V4.1 Flash
$14.70 per month$0.49 per day
GLM 5.3 Flash
$16.50 per month$0.55 per day
DeepSeek V4.1 Flash saves $1.80 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
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