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GLM 5.1 FP8

Recommended starting point for production agentic workloads on Corvex — strong at code, math, and instruction-following with a 202k context.
Model ID: zai-org/GLM-5.1-FP8

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About

GLM 5.1 FP8 is Z.AI’s most capable open-weights generalist (~754B total, ~40B active, FP8). Strong at code, math, and instruction-following with a 202k-token context window. Recommended starting point for production agentic workloads on Corvex. Served as a single grpc engine with EAGLE speculative decoding.

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Pricing

DirectionRate (USD)
Input$0.50 / 1M tokens
Output$2.00 / 1M tokens

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Capabilities

  • chat
  • function-calling
  • json-mode
  • long-context

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Specs

  • Context window: 202k tokens
  • License: Apache-2.0
  • Released: February 14, 2026
  • Chat and instruction following
  • Tool use and function calling
  • Structured-output generation (JSON mode)
  • Long-document Q&A and summarization

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Benchmarks

Benchmarks fill in during Alpha. Tracked as a follow-up to RD-562.

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Example prompts

  • Refactor this Go function to use generics and explain the trade-offs.
  • Summarise this 80k-token contract into a one-page brief with redlines highlighted.

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Quick start

curl https://api.corvex.ai/v1/chat/completions \
  -H "Authorization: Bearer $CORVEX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "zai-org/GLM-5.1-FP8",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
Open in the Corvex playground