OpenCraft

Model comparison

Muse Spark 1.3 vs GPT-6 Astra

Compare pricing, context windows and capabilities from OpenRouter. Open either model’s page to check availability and try it online.

metaMuse Spark 1.3newmeta/muse-spark-1.3openaiGPT-6 Astranewopenai/gpt-6-astra

Measured intelligence and task cost

Two current intelligence leaders from different providers. Artificial Analysis index v4.3, updated 2026-09-21.

GPT-6 Astra (max): 52.7 intelligence · $3.26 / AA task

Muse Spark 1.3 (max): 48.1 intelligence · $1.60 / AA task

Highest reasoning effort with both measurements available. Benchmark task costs are not OpenCraft task quotes; your settings and workload can differ.

Input price /M$1.254× cheaper$5.00
Output price /M$4.255.9× cheaper$25.00
Cache read /M$0.153.3× cheaper$0.50
Context window1M1.1M
Catalog date2 Sept 20264 Sept 2026

What the same turn costs

Estimates from published token rates — stated token counts, not measurements.

Quick answer2K tokens in, 600 outMuse Spark 1.3$0.00505× cheaperGPT-6 Astra$0.025
10-slide deck build60K tokens in, 9K outMuse Spark 1.3$0.1134.6× cheaperGPT-6 Astra$0.525
150-page PDF read200K tokens in, 4K outMuse Spark 1.3$0.2674.1× cheaperGPT-6 Astra$1.10

Capabilities

Bothtool-usevisionreasoning

Muse Spark 1.3: text, image, video, file, audio → text · GPT-6 Astra: file, image, text → text

Which model should you use?

Start with the token cost for your workload, the context you need, and supported input types. A lower price or larger context window does not establish better answer quality.

To compare answers, open each model in a separate chat and use the same prompt. Token tables use published specs and estimates; any measured AA results above are a separate benchmark.

Try Muse Spark 1.3 — pricing and availabilityTry GPT-6 Astra — pricing and availability