Archive · 30 Sep 2026
GPT-6.1 Sol Offers Lower-Cost Alternative To Flagship GPT-6 Astra
OpenAI launched GPT-6.1 Sol as a cheaper alternative to flagship GPT-6 Astra.
Sol costs $2 per million input tokens and $10 per million output tokens.
Astra costs $10 per million input tokens and $50 per million output tokens.
OpenAI says Sol approaches Astra’s performance on coding and other evaluations, including DeepSWE v1.1.
Both models have a 1.05-million-token context window and support up to 128,000 output tokens.
- Who
- OpenAI launched GPT-6.1 Sol and compared it with GPT-6 Astra.
- What
- OpenAI introduced GPT-6.1 Sol, a lower-cost model positioned near GPT-6 Astra’s performance for several tasks.
- When
- Tuesday, according to the article.
- Where
- The article does not specify a physical location.
- Why
- OpenAI says Sol is intended to provide strong coding, computer-use and professional-work capabilities at a lower API cost.
- GPT-6.1 Sol input price
- $2 per 1 million tokens
- GPT-6.1 Sol cached-input price
- $0.10 per 1 million tokens
- GPT-6.1 Sol output price
- $10 per 1 million tokens
- GPT-6 Astra input price
- $10 per 1 million tokens
- GPT-6 Astra cached-input price
- $1 per 1 million tokens
- GPT-6 Astra output price
- $50 per 1 million tokens
- Context and output limits
- Both models have a 1.05-million-token context window and support up to 128,000 output tokens