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  1. Home
  2. /
  3. Compare

Claude Opus 4.8 vs GLM 5.2

Compare Claude Opus 4.8 from Anthropic and GLM 5.2 from Z.ai on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Favicon for anthropic
Claude Opus 4.8
Favicon for z-ai
GLM 5.2
Favicon for anthropic
Claude Opus 4.8
Favicon for z-ai
GLM 5.2

Overview

Claude Opus 4.8
Author
Anthropic
GLM 5.2
Author
Z.ai
Claude Opus 4.8
Context length
1Mtokens
GLM 5.2
Context length
1.05Mtokens
Claude Opus 4.8
Reasoning
GLM 5.2
Reasoning
Claude Opus 4.8
Input modalities
GLM 5.2
Input modalities
Claude Opus 4.8
Output modalities
GLM 5.2
Output modalities

Claude Opus 4.8 vs GLM 5.2: side-by-side summary

Claude Opus 4.8 and GLM 5.2 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Opus 4.8, from Anthropic, has a 1,000,000-token context window and is priced at $5/M tokens input, $25/M tokens output on OpenRouter.

GLM 5.2, from Z.ai, has a 1,048,576-token context window and is priced at $0.0341/M tokens input, $7/M tokens output on OpenRouter.

Context window
  • Claude Opus 4.8: 1,000,000 tokens
  • GLM 5.2: 1,048,576 tokens
Price
  • Claude Opus 4.8: $5/M tokens input, $25/M tokens output
  • GLM 5.2: $0.0341/M tokens input, $7/M tokens output
Provided by
  • Claude Opus 4.8: Anthropic
  • GLM 5.2: Z.ai
  • Claude Opus 4.8 model details, providers and pricing
  • GLM 5.2 model details, providers and pricing

Claude Opus 4.8 vs GLM 5.2 at a glance

Claude Opus 4.8 vs GLM 5.2 comparison
AttributeClaude Opus 4.8GLM 5.2
Input price$5/M tokens$0.0341/M tokens
Output price$25/M tokens$7/M tokens
Context window1,000,000 tokens1,048,576 tokens
Intelligence Index41.833.7
Coding Index74.368.8
Agentic Index41.938.4
Latency (p50)0.84 s0.41 s
Throughput (p50)64.0 tok/s166.0 tok/s

Benchmark data updated Oct 24, 2026

Frequently asked questions

Is Claude Opus 4.8 cheaper than GLM 5.2?

GLM 5.2 is cheaper than Claude Opus 4.8 on OpenRouter: GLM 5.2 costs $0.0341/M tokens input and $7/M tokens output, while Claude Opus 4.8 costs $5/M tokens input and $25/M tokens output.

Which has the longer context window, Claude Opus 4.8 or GLM 5.2?

GLM 5.2 has the longer context window at 1,048,576 tokens, compared with 1,000,000 tokens for Claude Opus 4.8.

Which is faster, Claude Opus 4.8 or GLM 5.2?

GLM 5.2 is faster on OpenRouter, generating a median 166.0 tokens per second compared with 64.0 tokens per second for Claude Opus 4.8.

Which scores higher on coding, Claude Opus 4.8 or GLM 5.2?

Claude Opus 4.8 scores higher on coding, with an Artificial Analysis Coding Index of 74.3 compared with 68.8 for GLM 5.2.