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  1. Home
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  3. Compare

GPT-6 Luna Pro vs GLM 5.3 Flash

Compare GPT-6 Luna Pro from OpenAI and GLM 5.3 Flash 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 openai
GPT-6 Luna Pro
Favicon for z-ai
GLM 5.3 Flash
Favicon for openai
GPT-6 Luna Pro
Favicon for z-ai
GLM 5.3 Flash

Overview

GPT-6 Luna Pro
Author
OpenAI
GLM 5.3 Flash
Author
Z.ai
GPT-6 Luna Pro
Context length
1.05Mtokens
GLM 5.3 Flash
Context length
1.31Mtokens
GPT-6 Luna Pro
Reasoning
GLM 5.3 Flash
Reasoning
GPT-6 Luna Pro
Input modalities
GLM 5.3 Flash
Input modalities
GPT-6 Luna Pro
Output modalities
GLM 5.3 Flash
Output modalities

GPT-6 Luna Pro vs GLM 5.3 Flash: side-by-side summary

GPT-6 Luna Pro and GLM 5.3 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-6 Luna Pro, from OpenAI, has a 1,050,000-token context window and is priced at $0.10/M tokens input, $0.50/M tokens output on OpenRouter.

GLM 5.3 Flash, from Z.ai, has a 1,310,720-token context window and is priced at $0.075/M tokens input, $0.25/M tokens output on OpenRouter.

Context window
  • GPT-6 Luna Pro: 1,050,000 tokens
  • GLM 5.3 Flash: 1,310,720 tokens
Price
  • GPT-6 Luna Pro: $0.10/M tokens input, $0.50/M tokens output
  • GLM 5.3 Flash: $0.075/M tokens input, $0.25/M tokens output
Provided by
  • GPT-6 Luna Pro: OpenAI
  • GLM 5.3 Flash: Z.ai
  • GPT-6 Luna Pro model details, providers and pricing
  • GLM 5.3 Flash model details, providers and pricing