Z.ai: GLM 5.1
Z.ai
Z.ai: GLM 5.1 by Z.ai costs $1.33 per 1M input tokens and $4.18 per 1M output tokens, with a 205K-token context window.
Pricing
Input (per 1M tokens)
$1.33
Output (per 1M tokens)
$4.18
Cached input (per 1M)
$0.25
Specifications
- Provider
- Z.ai
- Context window
- 205K tokens
- Parameters
- 754B
- Released
- Apr 2026
- Open weights
- —
- Frontier model
- No
- Hugging Face
- zai-org/GLM-5.1
Benchmarks
- LMArena WebDev Elo
- 1508.4
Speed & latency
Time to first token
1.59s
Output speed
144 tok/s
Fastest host: novita (via vercel-ai-gateway).
Compare Z.ai: GLM 5.1 with…
FAQ
How much does Z.ai: GLM 5.1 cost?
Z.ai: GLM 5.1 is priced at $1.33 per 1M input tokens and $4.18 per 1M output tokens. Output tokens cost more than input.
What is Z.ai: GLM 5.1's context window?
Z.ai: GLM 5.1 supports a context window of 205K tokens — the maximum prompt plus response length it can handle in a single request.
Is Z.ai: GLM 5.1 open weight?
Open-weight status for Z.ai: GLM 5.1 is not recorded in our dataset.
Data as of 2026-10-14. Source: Pricing via OpenRouter API, openrouter.ai. Pricing is per 1M tokens (USD); confirm with the provider before production use.