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zai-org/GLM-5.1
zhipuai·zhipuai/glm-5.1-9·GA·Open weights·glm series
Flagship GLM model for hybrid reasoning, coding, and agentic engineering
At a glance
Reference price$1.40 / $4.40 per 1M
Cache read $0.26 · SiliconFlow
Lowest paid$1.40 / $4.40
SiliconFlow Cloud
Context205,000
Output limit205,000
Capabilities
✓ Reasoning✓ Tool use✓ Structured output✓ TemperatureAttachments
Modalities
Text
Knowledge cutoff—
Released / updated2026-04-08 / 2026-04-08
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 1 providers1 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| SiliconFlow zai-org/GLM-5.1 | Cloud | $1.40 | $4.40 | $0.26 | $0 | 205,000 | 205,000 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1SiliconFlow$363.20
The cheapest paid channel is the only channel.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
budget_tokens ≥ 128 ≤ 32,768
Related models
GLM Latestsame series$1.40 / $4.40Z.ai: GLM Latestsame series$1.40 / $4.40GLM 5.3 Preview Thinkingsame series$1.40 / $4.40DeepSeek V4 Procheaper alternative$0.435 / $0.87DeepSeek V4 Flashcheaper alternative$0.14 / $0.28MiniMax-M2.7cheaper alternative$0.30 / $1.20DeepSeek V4 Flash 0731cheaper alternative$0.479 / $1.44
Price historyone sample accumulated per data sync
Input list $1.40Output list $4.40Min blended $2.15
Price history accumulates from each data sync; currently only 1 sample(s) (2026-08-21). Each future sync adds a point, and once accumulated a line is drawn here.