Introducing GPT-6.1 Sol

What changed

Meet GPT-6.1 Sol: near-Astra intelligence for coding, computer use, and professional work at one-fifth of Astra’s standard API input and output token prices.

Why it matters

A concrete addition to Practical AI: Tools, Models & Frameworks: it changes what's available to builders today rather than being general commentary.

How it compares

Related prior coverage to compare against:

• Introducing GPT-6 Sol and Luna
• Introducing GPT-5.4
• Previewing Ultrafast mode: GPT-5.6 Sol at up to 14X the speed

• Introducing GPT-6 Sol and Luna similarity 0.38
• Introducing GPT-5.4 similarity 0.30
• Previewing Ultrafast mode: GPT-5.6 Sol at up to 14X the speed similarity 0.27