OpenAI's mid-tier GPT-6 model, positioned below GPT-6 Astra and above Luna, priced at $2/$10 per million tokens.
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GPT-6 Sol is the mid tier of OpenAI's GPT-6 family, which according to creator coverage consists of Astra (top), Sol (mid) and Luna (cheapest). It is described as a workhorse model one step below the frontier Astra, and is reported to cost 50% less than GPT-5.6 Sol. A "Sol Max" variant is reported to score a few points below Astra at over three times lower cost.
Reported API pricing is $2 per million input tokens and $10 per million output tokens. Creators cite a score of 33% on Automation Bench at extra-high effort and 48 on the Artificial Analysis index, and say it outperforms Claude Fable 5.1 at lower cost. These figures come from third-party commentary rather than OpenAI documentation provided here.
Sol is reported to be available in ChatGPT's work and code experiences on paid plans, while Luna is offered to free users in the desktop app. It is a proprietary hosted model; weights are not released. Exact context limits, modalities and release date were not confirmed in the provided material (it reportedly launched within hours of Claude Opus 5.5, around November 2026).
Watch the moment: the exact second top creators show it. Videos load only when you press play, via youtube-nocookie.com.
Mid and light tiers of the GPT-6 family (Astra top, Sol mid, Luna cheapest). Sol Max is a few points below Astra but over three times cheaper; Luna is very cheap. Available in GPT work and code on paid plans, Luna in desktop app for free users.
Cheaper GPT-6 tier priced at $2 input and $10 output per million tokens, almost as good as Astra at lower cost. In the Mega Bonk test it was decent but below Astra.
New OpenAI workhorse model, one step under the frontier GPT-6 Astra, priced at $2 per million input and $10 per million output tokens (50% cut vs GPT-5.6 Sol). It scored 33% on Automation Bench at extra high effort and exceeds Claude Fable 5.1 at lower cost.
OpenAI model launched hours after Opus 5.5, with price halved to $2/$10 per million tokens versus 5.6 Soul. It is faster and cheaper but not as strong as Astra, and scores 48 on Artificial Analysis. On the creator's Beauty Bench it ranked first, though he prefers Astra visually.
Closest neighbours by meaning, not just by category.
Model · OpenAI
OpenAI's GPT-6.1 Sol: near-GPT-6 Astra performance on coding and agent tasks at one-fifth of Astra's API price.
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OpenAI's GPT-5.6 Sol frontier model, with an Ultrafast API tier on Cerebras reaching up to 750 output tokens per second.
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OpenAI language model in the GPT-6.1 family; the Soul Max variant is noted by reviewers for low token use per task.
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OpenAI's lighter, lower-cost GPT-5.6 model variant, suited to routine tasks such as setup and scripting work.
Model · OpenAI
OpenAI's GPT-6 Astra, a frontier language model used for reasoning, agentic work and weight interpretation research.
Model · OpenAI
OpenAI's mid-tier GPT-6.1 model for computer use, visual reasoning and coding, priced at $1/$5 per million tokens.
