// head_to_head
DeepSeek V4.1 Flash vs GLM 5.3 Prime
Published LiveBench scores across all seven categories, live list pricing, context windows, and the measured cost of a point of capability — for both models, side by side.
DeepSeek V4.1 Flash is the cheaper of the two; neither can be ranked on quality here.
GLM 5.3 Prime does not have a published LiveBench run, so this comparison covers price, context and declared capabilities only. A missing score means "not evaluated", not "worse" — the right way to separate these two is an eval on your own workload.
deepseek
DeepSeek V4.1 Flash
- Blended / 1M
- $0.210
- Context
- 1.0M
- Released
- Sep 10, 2026
- Overall score
- 81.1
z-ai
GLM 5.3 Prime
- Blended / 1M
- $4.30
- Context
- 1M
- Released
- Sep 23, 2026
- Overall score
- Not evaluated
Specs and pricing
| Metric | DeepSeek V4.1 Flash | GLM 5.3 Prime |
|---|---|---|
| LiveBench overall Mean of the seven LiveBench category scores, 0–100. Higher is better. | 81.1 | — |
| Cost per point Measured benchmark spend divided by overall score — dollars per point of capability. | $0.0157 | — |
| Blended price / 1M 3:1 input:output mix, the usual shape of production traffic. | $0.210win | $4.30 |
| Input price / 1M | $0.140win | $2.80 |
| Output price / 1M | $0.420win | $8.80 |
| Cached input / 1M Price of an input token served from the prompt cache, where the provider publishes one. | $0.0042win | $0.560 |
| Context window | 1.0M | 1M |
| Max output tokens | 131K | 131K |
Benchmarks by category
An overall score averages away the thing you probably care about. These are the seven LiveBench categories scored separately — DeepSeek V4.1 Flash on top, GLM 5.3 Prime below, both out of 100.
What each one costs to run
Per-token prices are hard to feel. These are monthly list costs for both models across five workload shapes, using each provider's published cached-input rate where there is one.
| Workload | DeepSeek V4.1 Flash | GLM 5.3 Prime |
|---|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $57.42/mo | $1,215/mo |
| RAG assistant 8K in / 600 out × 100K requests | $82.88/mo | $1,872/mo |
| Coding agent 40K in / 4K out × 20K requests | $69.55/mo | $1,690/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $164.71/mo | $3,348/mo |
| Bulk classification 500 in / 20 out × 5M requests | $324.10/mo | $6,760/mo |
Which should you pick?
You are cost-constrained
DeepSeek V4.1 Flash
Cheaper on blended list price at $0.210 per million tokens.
DeepSeek V4.1 Flash vs GLM 5.3 Prime FAQ
Which is better, DeepSeek V4.1 Flash or GLM 5.3 Prime?
DeepSeek V4.1 Flash is the cheaper of the two; neither can be ranked on quality here. GLM 5.3 Prime does not have a published LiveBench run, so this comparison covers price, context and declared capabilities only. A missing score means "not evaluated", not "worse" — the right way to separate these two is an eval on your own workload.
Is DeepSeek V4.1 Flash cheaper than GLM 5.3 Prime?
DeepSeek V4.1 Flash is cheaper. On a 3:1 input:output blend, DeepSeek V4.1 Flash lists at $0.210 per million tokens and GLM 5.3 Prime at $4.30 — DeepSeek V4.1 Flash is 20× cheaper. Input and output are priced separately — DeepSeek V4.1 Flash charges $0.140 in and $0.420 out, GLM 5.3 Prime charges $2.80 and $8.80 — so the model that looks cheaper flips depending on how output-heavy your workload is.
Does DeepSeek V4.1 Flash or GLM 5.3 Prime have a bigger context window?
They are effectively the same — 1.0M for DeepSeek V4.1 Flash and 1M for GLM 5.3 Prime.
Do DeepSeek V4.1 Flash and GLM 5.3 Prime support prompt caching?
Both publish a cached-input rate: $0.0042 per million for DeepSeek V4.1 Flash and $0.560 for GLM 5.3 Prime, against full input rates of $0.140 and $2.80. On a workload with a long stable prefix — a system prompt, a tool schema, a retrieved corpus — that changes the economics more than the headline price does.
Related comparisons
How these numbers are produced
- Price — provider list price from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores — LiveBench release 2026-06-25, using their own category map. Each model shows its strongest published run. A blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
- “Win” — awarded only past a threshold: one full point on a benchmark score, 10% on a price, 25% on a context window. Anything tighter reports as a tie, because effort settings alone move a LiveBench score by more than that.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.