Compare GPT-6 Astra from OpenAI and GLM 5.3 FlashX 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 Astra and GLM 5.3 FlashX are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-6 Astra, from OpenAI, has a 1,050,000-token context window and is priced at $10/M tokens input, $50/M tokens output on OpenRouter.
GLM 5.3 FlashX, from Z.ai, has a 1,048,576-token context window and is priced at $0.37/M tokens input, $1.25/M tokens output on OpenRouter.