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    OpenAI News (firm-scan)Tuesday, September 29, 2026 3 min read
    OpenAI

    Introducing GPT-6.1 Sol

    OpenAI has released GPT-6.1 Sol, an upgraded agentic model priced at $2 per million input tokens and $10 per million output tokens — one-fifth the cost of GPT-6 Astra — while delivering near-Astra performance across coding, professional …

    Key takeaways
    • 01Cached input pricing drops to $0.10 per million tokens, 95% below standard input pricing, materially lowering the economics of context-reuse in long-running agents.
    • 02On AutomationBench, GPT-6.1 Sol outscores Claude Opus 5.5 by 2.2 percentage points at roughly one-third the cost per task; on Terminal-Bench Science it delivers comparable capability at over 75% lower cost than both Opus 5.5 and Astra.
    • 03The model is available immediately via API and to ChatGPT Plus, Pro, Business, Enterprise, and Edu tiers, with an Ultrafast variant offering up to 8x faster token generation coming within days.
    In brief · from openai.com

    OpenAI has released GPT-6.1 Sol, an upgraded agentic model priced at $2 per million input tokens and $10 per million output tokens — one-fifth the cost of GPT-6 Astra — while delivering near-Astra performance across coding, professional document work, multi-step business workflows, and computer use. Cached input pricing drops to $0.10 per million tokens, 95% below standard input pricing, materially lowering the economics of context-reuse in long-running agents.

    Read the full article at openai.com

    OpenAI has released GPT-6.1 Sol, an upgraded agentic model priced at $2 per million input tokens and $10 per million output tokens — one-fifth the cost of GPT-6 Astra — while delivering near-Astra performance across coding, professional document work, multi-step business workflows, and computer use. Cached input pricing drops to $0.10 per million tokens, 95% below standard input pricing, materially lowering the economics of context-reuse in long-running agents. On AutomationBench, GPT-6.1 Sol outscores Claude Opus 5.5 by 2.2 percentage points at roughly one-third the cost per task; on Terminal-Bench Science it delivers comparable capability at over 75% lower cost than both Opus 5.5 and Astra. The model is available immediately via API and to ChatGPT Plus, Pro, Business, Enterprise, and Edu tiers, with an Ultrafast variant offering up to 8x faster token generation coming within days.

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