Compare GPT-6 Luna Pro from OpenAI and GLM 5.3 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.
GPT-6 Luna Pro and GLM 5.3 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, from Z.ai, has a 1,310,720-token context window and is priced at $0.6538/M tokens input, $2.055/M tokens output on OpenRouter.