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.

GPT-6 AstraOpenAI Remove
GPT-4o TranscribeOpenAI Remove
Claude Fable 5.1Anthropic Remove
GLM 5.3Z.AI Remove

4 is the maximum. Remove one to add another.

gpt-6-astra vs gpt-4o-transcribe vs claude-fable-5.1 vs glm-5.3
Attribute	GPT-6 Astragpt-6-astra	GPT-4o Transcribegpt-4o-transcribe	Claude Fable 5.1claude-fable-5.1	GLM 5.3glm-5.3
Pricing
Input	$10.00 / 1M	$1.25 / 1M	$10.00 / 1M	$1.40 / 1M
Output	$50.00 / 1M	$0 / 1M	$50.00 / 1M	$4.40 / 1M
Cache Write (5m)	$10.00 / 1M	Not applicable	$12.50 / 1M	$1.40 / 1M
Cache Write (1h)	$10.00 / 1M	Not applicable	$20.00 / 1M	$1.40 / 1M
Cache Read	$10.00 / 1M	Not applicable	$1.00 / 1M	$1.40 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	128K	1M	1M
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	No	Yes	No
Function Calling	Yes	No	Yes	Yes
JSON Mode	Yes	Yes	Yes	Yes
Streaming	Yes	No	Yes	Yes
Catalogue
Provider	OpenAI	OpenAI	Anthropic	Z.AI
Category	chat	voice	chat	chat
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	—	—	—	—
Description
Summary	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.	GPT-4o Transcribe is OpenAI's high-quality speech-to-text model built on GPT-4o's audio capabilities. It delivers accurate transcription with strong language understanding, making it suitable for a wide range of audio processing tasks. Priced per token (input and output), it offers transparent, fine-grained billing, making it well suited for workflows that require scalable transcription, integration with LLM pipelines, and cost-aware processing.	Claude Fable 5.1 is an upgraded version of Fable 5, delivering broad improvements with particularly strong gains in agentic coding, long-running workflows, and professional knowledge work. It excels at large code refactors, front-end and visual code generation, financial analysis, and complex analytical tasks. Compared with Fable 5, it also produces more concise plans and summaries while maintaining strong performance across extended tasks, making it a natural upgrade for existing Fable workflows and a strong option alongside Opus 5 for reasoning-intensive applications.	GLM-5.3 is Z.ai's large-scale reasoning model designed for complex software engineering and long-horizon agentic workflows. It supports text input and output with a 1M-token context window, enabling sustained reasoning across large codebases and extended multi-step tasks. Building on GLM-5.2, it delivers stronger coding performance while improving the balance between capability and token efficiency, making it well suited for autonomous coding agents, large-scale engineering workflows, and complex task execution.