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glm-5.1 is the published flagship from Zhipu’s 智谱 GLM family — strong on Chinese tasks, vision-capable. It supersedes the earlier glm-5 preview.

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Pricing

InputCache readOutput
$1.40 / 1M$0.26 / 1M$4.40 / 1M
Cache write is billed at the input rate. See the pricing table for the live rate.

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Protocols

ProtocolPath
OpenAI Chat CompletionsPOST https://llm.bytespike.ai/v1/chat/completions

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Quickstart

curl https://llm.bytespike.ai/v1/chat/completions \
  -H "Authorization: Bearer $BYTESPIKE_API_KEY" \
  -H "content-type: application/json" \
  -d '{
    "model": "glm-5-1",
    "messages": [{ "role": "user", "content": "Hello, ByteSpike." }]
  }'

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Capabilities

CapabilitySupported
Chat Completions✅
Streaming (SSE)✅
Tools / function calling✅
JSON mode✅
Vision (image input)✅
Context window128K tokens

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When to use

  • Chinese-language general chat — GLM-5.1 is competitive with Doubao on Chinese benchmarks.
  • Vision in CN region — good OCR / document understanding.
The earlier glm-5 preview is legacy and no longer the published flagship — use glm-5.1.

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