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GLM 5.1 API

Open in consoleI need inference
  • 203KContext
  • 65.5KMax output
  • $0.90/ $2.90From, per 1M in / out
  • 1Provider
Providers
  • Chutes

Pricing

ProviderInput / 1MCached / 1MOutput / 1M
Chutes$0.90$0.09$2.90

USD, as of October 28, 2026. Live prices

Cost

WorkloadChutes
1,000 chat replies2K in, 500 out each$3.25
1,000 agent tasks50K in, 5K out each$59.50
Monthly batch job500M in, 50M out$595.00

Quickstart

OpenAI-compatible
curl https://api.routerplus.com/v1/chat/completions \
  -H "Authorization: Bearer $ROUTERPLUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "z-ai/glm-5.1",
    "messages": [{ "role": "user", "content": "Hello" }]
  }'

FAQ

How much does the GLM 5.1 API cost?

On RouterPlus, GLM 5.1 costs $0.90 per million input tokens and $2.90 per million output tokens at Chutes, the lowest listed prices and the provider where routing starts. Prices as of October 28, 2026.

Which providers serve GLM 5.1?

Chutes serves GLM 5.1 on RouterPlus today.

What is the GLM 5.1 model ID?

Use "z-ai/glm-5.1" as the model with the OpenAI-compatible endpoint at https://api.routerplus.com/v1. The same key also accepts the Anthropic API format.

What is the GLM 5.1 context window?

203K tokens of context and up to 65.5K output tokens, per the RouterPlus catalog. A provider can list a lower limit; the console shows each one.

Is GLM 5.1 open weights?

Yes. Z.ai publishes GLM 5.1 as an open-weight model, which is why several independent providers can host it.

Do any GLM 5.1 providers retain prompts?

None of the 1 providers serving GLM 5.1 on RouterPlus list prompt retention.

Can I reserve capacity for GLM 5.1?

Yes. Tell us the model, the throughput you need and the region with "I need inference", and RouterPlus lines up reserved capacity for it.

More GLM

All GLM modelsAll models

Need GLM 5.1 at volume?

Open in consoleI need inference