The Orchestrator › Models › Z.ai
Z.ai: GLM 5.1
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work independently and continuously on...
Specifications
| Provider | Z.ai |
| Model ID | z-ai/glm-5.1 |
| Context window | 205K tokens (204,800) |
| Modalities | text → text |
| Tokenizer | Other |
| Router sources | OpenRouter, TrustedRouter, Vercel AI Gateway |
| Released | 2026-04-07 |
| Tracked since | 2026-11-14 |
| Popularity | Not in the ranked set |
| Reasoning | On by default |
Pricing (per million tokens)
| Variant | Source | API ID | Input | Output | Context |
|---|---|---|---|---|---|
| standard | OpenRouter | z-ai/glm-5.1 | $1.40 | $4.40 | 205K |
| standard | TrustedRouter | z-ai/glm-5.1 | $0.95 | $3.06 | 203K |
| standard | Vercel AI Gateway | z-ai/glm-5.1 | $1.40 | $4.40 | 203K |
Recorded price history
| Date | Input / 1M | Output / 1M | Context |
|---|---|---|---|
| 2026-11-14 | $1.40 | $4.40 | 203K |
| 2026-11-14 | $0.95 | $3.06 | 203K |
| 2026-11-14 | $1.40 | $4.40 | 205K |
Capabilities
Agentic tool useStructured outputsReasoning modeControllable reasoningNo content storage (attested)Zero data retention
Trust flags come from TrustedRouter's per-provider attestations.
Supported parameters
frequency_penalty, include_reasoning, logit_bias, logprobs, max_tokens, min_p, presence_penalty, reasoning, repetition_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_logprobs, top_p