DeepSeek V4 Pro vs GLM-5.3 — Price, Context, and Capability Compared
DeepSeek V4 Pro vs GLM-5.3: which should I use?
DeepSeek V4 Pro and GLM-5.3 are priced within a few percent of each other. DeepSeek V4 Pro has the larger context window (1,000,000 tokens). Default to DeepSeek V4 Pro unless you specifically need GLM-5.3's edge.
Where can you find price, speed, and task evidence for DeepSeek V4 Pro and GLM-5.3?
Which tasks fit DeepSeek V4 Pro and GLM-5.3?
Best-fit task signals from the published model strengths; this is not a substitute for a controlled benchmark.
| Fact | DeepSeek V4 Pro | GLM-5.3 |
|---|---|---|
| Best fit | Rigorous math, proofs, and hard algorithmic problems on a budget. | Long-horizon coding on open weights at a fraction of frontier pricing. |
| Reasoning mode | Available | Available |
What does a Coding Agent workload cost with DeepSeek V4 Pro and GLM-5.3?
Modeled for Coding Agent: 20,000 input + 2,000 output tokens per task, 1 turn. This is a workload model, not a provider quote.
| Fact | DeepSeek V4 Pro | GLM-5.3 |
|---|---|---|
| Coding Agent / task | $0.03 (modeled) (winner) | $0.04 (modeled) |
| Input / output rate | $1.32 / $3.96 per M | $1.40 / $4.40 per M |
How fast are DeepSeek V4 Pro and GLM-5.3?
Only non-estimated benchmark results are shown as measured.
| Fact | DeepSeek V4 Pro | GLM-5.3 |
|---|---|---|
| Measured throughput | 68 tokens/s | Unavailable |
| Time to first token | 480 ms | Unavailable |
How compatible are DeepSeek V4 Pro and GLM-5.3 with APIs?
Provider-level wire-format and SDK facts; model-specific parameter differences may still apply.
| Fact | DeepSeek V4 Pro | GLM-5.3 |
|---|---|---|
| OpenAI SDK | Usable | Usable |
| Request shape | OpenAI-compatible chat/completions; set model to a deepseek-* id and point base_url at api.deepseek.com. | OpenAI-compatible chat/completions endpoint at api.z.ai/api/paas/v4. |
| Streaming | SSE (OpenAI delta) | SSE (OpenAI delta) |
What are the privacy and retention policies for DeepSeek V4 Pro and GLM-5.3?
Provider policy and residency facts from the verified provider registry. A missing retention policy is not treated as a guarantee.
| Fact | DeepSeek V4 Pro | GLM-5.3 |
|---|---|---|
| Provider says API data trains models | Unavailable | Unavailable |
| Published retention period | Unavailable | Unavailable |
| Data residency | Unavailable | Unavailable |
How much effort does it take to migrate between DeepSeek V4 Pro and GLM-5.3?
Direction is from each displayed model to the other. Effort is derived from provider compatibility and published parameter maps.
| Fact | DeepSeek V4 Pro | GLM-5.3 |
|---|---|---|
| Move DeepSeek V4 Pro → GLM-5.3 | config; 0 breaking parameter differences | Target: GLM-5.3 |
| Move GLM-5.3 → DeepSeek V4 Pro | Source: GLM-5.3 | config; 1 breaking parameter difference |
| Why | Keep the `openai` SDK; change `baseURL` and the API key. | Keep the `openai` SDK; change `baseURL` and the API key. |
How do DeepSeek V4 Pro and GLM-5.3 compare on specs?
| DeepSeek V4 Pro | GLM-5.3 | |
|---|---|---|
| Price (input) | $1.32/M ✓ | $1.40/M |
| Price (output) | $3.96/M ✓ | $4.40/M |
| Blended price | $1.98/M ✓ | $2.15/M |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Max output | 384,000 tokens ✓ | 131,072 tokens |
| Modalities | text | text |
| Reasoning mode | Yes | Yes |
| Released | 2026-05 | 2026-08 |
| Speed | 68 t/s | Not measured |
How much do DeepSeek V4 Pro and GLM-5.3 cost at scale?
| Tokens / month | DeepSeek V4 Pro | GLM-5.3 | Delta |
|---|---|---|---|
| 1,000,000 | $1.98 | $2.15 | $0.17 (1.1×) |
| 10,000,000 | $19.80 | $21.50 | $1.70 (1.1×) |
| 100,000,000 | $198.00 | $215.00 | $17.00 (1.1×) |
Choose DeepSeek V4 Pro if…
- ✓Thinking mode with visible chain-of-thought
- ✓Frontier-level math and competition coding
- ✓Still far cheaper than closed frontier models
- ✓Rigorous math, proofs, and hard algorithmic problems on a budget.
Choose GLM-5.3 if…
- ✓Z.ai coding-first flagship, 50% stronger than 5.2 on code bench
- ✓1M-token context with 128K outputs
- ✓Mandatory reasoning with low/high/max effort
- ✓Long-horizon coding on open weights at a fraction of frontier pricing.
Run this exact matchup right now
Send the same prompt to DeepSeek V4 Pro and GLM-5.3 side by side and see the outputs yourself.
Try DeepSeek V4 Pro vs GLM-5.3 FreeWhat are common questions about DeepSeek V4 Pro and GLM-5.3?
Is DeepSeek V4 Pro cheaper than GLM-5.3?
DeepSeek V4 Pro is cheaper, at $1.98 per million blended tokens vs $2.15 for GLM-5.3.
Which has the bigger context window, DeepSeek V4 Pro or GLM-5.3?
Both models support 1,000,000 tokens of context.
Can DeepSeek V4 Pro replace GLM-5.3 for coding?
Both are viable for coding. Thinking mode with visible chain-of-thought (DeepSeek V4 Pro) vs Z.ai coding-first flagship, 50% stronger than 5.2 on code bench (GLM-5.3) — pick based on which strength matters more for your workload.
Neither of these? See DeepSeek V4 Pro alternatives or GLM-5.3 alternatives.
What related comparisons help choose between DeepSeek V4 Pro and GLM-5.3?
Pricing verified 2026-08-14. Specs verified 2026-08-14.