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💬 Text ModelOpen Source

GLM-5.1

by Z.ai (Zhipu AI)

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026
API Reference

Benchmark Evaluations

Codingswe-bench-pro

58.4%

Reasoninggpqa-diamond

86.2%

Pricing & Speed Details

Input Cost

$0.98

per 1M tokens
Output Cost

$3.08

per 1M tokens
Blended Cost

$1.50

based on 3:1 ratio
Speed

N/A

Context Window

204.8k tokens

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Quick Info

  • ProviderZ.ai (Zhipu AI)
  • CategoryText / Chat Generation
  • LicenseOpen Source

Frequently Asked Questions

GLM-5.1 has a blended cost of $1.50 per 1 million tokens (calculated using a standard 3:1 input-to-output token ratio). Its specific pricing is $0.98 per 1M input tokens and $3.08 per 1M output tokens.

GLM-5.1 supports a context window of 204.8k tokens. This allows it to process large documents, codebase segments, or long chat histories in a single query session.

GLM-5.1 scores 58.4% on coding evaluations (SWE-bench-pro) and 86.2% on reasoning tasks (GPQA-diamond).

GLM-5.1 is an open source model developed by Z.ai (Zhipu AI).