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.

Muse Spark 1.3Meta Remove
GPT-6 Astra ProOpenAI Remove
S1Fish Audio Remove
S2 ProFish Audio Remove

4 is the maximum. Remove one to add another.

muse-spark-1.3 vs gpt-6-astra-pro vs s1 vs s2-pro
Attribute	Muse Spark 1.3muse-spark-1.3	GPT-6 Astra Progpt-6-astra-pro	S1s1	S2 Pros2-pro
Pricing
Input	$1.25 / 1M	$10.00 / 1M	$0 / 1M	$0 / 1M
Output	$4.25 / 1M	$50.00 / 1M	$0 / 1M	$0 / 1M
Cache Write (5m)	$1.25 / 1M	$10.00 / 1M	Not applicable	Not applicable
Cache Write (1h)	$1.25 / 1M	$10.00 / 1M	Not applicable	Not applicable
Cache Read	$1.25 / 1M	$10.00 / 1M	Not applicable	Not applicable
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	1M	N/A	N/A
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	Yes	No	No
Function Calling	Yes	Yes	No	No
JSON Mode	Yes	Yes	No	No
Streaming	Yes	Yes	No	No
Catalogue
Provider	Meta	OpenAI	Fish Audio	Fish Audio
Category	chat	chat	voice	voice
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	—	—	2026-07-29	2026-07-29
Description
Summary	Muse Spark 1.3 is Meta's multimodal reasoning model designed for long-running agentic, multi-agent, and coding workflows. It maintains context and information across extended tasks, enabling reliable execution in complex, multi-step environments. The model is optimized to resolve conflicting information, seek clarification or confirmation when necessary, and execute concisely, making it well suited for autonomous agents, collaborative multi-agent systems, and long-horizon software engineering workflows.	GPT-6 Astra Pro uses the same underlying model as GPT-6 Astra, but runs with reasoning.mode set to pro for higher-quality responses on complex tasks. Optimized for deeper reasoning, greater accuracy, and more reliable multi-step execution, it is well suited for demanding coding, analysis, and agentic workflows where solution quality takes priority over speed and cost.	Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.	Fish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text.