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Compare models

Put up to 4 models beside each other — token prices, context windows, capabilities and provider, from the same catalogue the model pages read.

  1. Universal-3.5 ProAssemblyAIRemove
  2. GPT-6 AstraOpenAIRemove
  3. GLM 5.3 FlashZ.AIRemove
universal-3-5-pro vs gpt-6-astra vs glm-5.3-flash
AttributeUniversal-3.5 Prouniversal-3-5-proGPT-6 Astragpt-6-astraGLM 5.3 Flashglm-5.3-flash
Pricing
Input— Not priced per input token$10.00 / 1M$0.075 / 1M
Output— Not priced per output token$50.00 / 1M$0.25 / 1M
Cache Write (5m)Not applicable$10.00 / 1M$0.075 / 1M
Cache Write (1h)Not applicable$10.00 / 1M$0.075 / 1M
Cache ReadNot applicable$10.00 / 1M$0.075 / 1M
Web Search$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/A1M1M
Max outputN/AN/AN/A
Capabilities
VisionNoYesYes
Function CallingNoYesYes
JSON ModeNoYesYes
StreamingNoYesYes
Catalogue
ProviderAssemblyAIOpenAIZ.AI
Categoryvoicechatchat
Charge typePay As You GoPay As You GoPay As You Go
Released2026-09-22——
Description
SummaryAssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.GPT-6 Astra is OpenAI's flagship model for demanding end-to-end professional work, designed for advanced analysis, software engineering, deep research, scientific tasks, and document creation. It is particularly strong in long-horizon agentic workflows, including tasks that require sustained reasoning, tool orchestration, and computer and browser use, making it well suited for complex autonomous workflows and production-grade knowledge work.GLM-5.3-Flash is Z.AI's efficient native multimodal model, designed for coding and long-horizon agentic workflows. It combines strong multimodal capabilities with an architecture optimized for responsive, cost-efficient task execution. Built on a hybrid sparse and linear attention architecture, GLM-5.3-Flash maintains accurate long-context behavior while reducing computational overhead, making it well suited for coding agents, extended multi-step tasks, and scalable production workloads.