GLM 5.3 Prime API Pricing & Monthly Cost Simulator
Verified 2026 unit economics for Z.ai / GLM GLM 5.3 Prime (z-ai/glm-5.3-prime): $2.8/1M uncached input, $0.56/1M cached prefix read, and $8.8/1M output across a 1,000,000-token context window (released 2026-09-23).
Uncached Input (/1M)
$2.8
Cached Prompt Read (/1M)
$0.56 (-80%)
Output Completion (/1M)
$8.8
50% Batch API (In / Out)
Real-time API only (no 50% async batch)
Interactive 30-Day Monthly Spend Simulator
Live Unit-Cost & Prompt Cache Slider (GLM 5.3 Prime)
z-ai/glm-5.3-prime
Estimated 30-day spend
$412.80/mo
Cost per 1,000 calls
$13.7600
Monthly savings vs 0% cache
$134.40/mo
Technical Limits & API Capabilities
Context window
1,000,000
Max output tokens
131,072
Workload tier
Frontier Flagship
Input modalities
text
Tool Calling: Yes
JSON Schema Strict: Yes
Reasoning Tokens: Supported
Batch API: Unavailable
Same-Category 2026 Model Alternatives (Frontier Flagship)
| Model | Provider | Input / Cached ($/1M) | Output ($/1M) | Context / Max Out |
|---|---|---|---|---|
| GLM 5.3 Prime | Z.ai / GLM | $2.8 / $0.56 | $8.8 | 1,000,000 / 131,072 |
| Qwen3.8 Max Prime | Qwen | $4 / $0.5 | $12 | 1,000,000 / 131,072 |
| Qwen3.8 Max (0902) | Qwen | $2 / $0.25 | $6 | 1,000,000 / 131,072 |
| Qwen3.8 2.4T A95B | Qwen | $2 / $0.25 | $6 | 1,048,576 / 131,072 |
| Grok 4.6 | xAI | $2 / $0.5 | $6 | 500,000 / 450,000 |
Head-to-Head Matchups Featuring GLM 5.3 Prime
- GLM 5.3 Prime vs Qwen3.8 Max Prime — $2.8 vs $4 / 1M
Frequently Asked Questions
How much does GLM 5.3 Prime cost per 1 million tokens in 2026?
GLM 5.3 Prime by Z.ai / GLM is billed at $2.8 per 1M uncached input tokens, $0.56 per 1M cached input read tokens (80% cache discount), and $8.8 per 1M output tokens.
What are the context window and max output token limits for GLM 5.3 Prime?
GLM 5.3 Prime supports a 1,000,000-token input context window and up to 131,072 completion output tokens per request, accepting text inputs.
Does GLM 5.3 Prime support strict JSON Schema outputs, tool calling, and Batch API?
GLM 5.3 Prime capability profile: tool calling = Supported, strict JSON Schema structured outputs = Supported, reasoning mode = Supported, and 50% asynchronous Batch API = Not listed.