Microsoft has made GPT-6 Sol and Luna generally available in Microsoft Foundry, expanding its GPT-6 lineup alongside Astra for production AI agents and enterprise workloads.
Microsoft said GPT-6 Sol targets general-purpose production use, including enterprise agents, coding, long-context analysis and multi-step workflows that use tools.
Luna is the smaller, faster model aimed at high-volume tasks such as extraction, summarisation, request routing and routine customer interactions.
GPT-6 Astra remains Microsoft’s recommended option for demanding work involving advanced reasoning, software engineering and computer use.
Microsoft said customers should evaluate models by workload rather than apply the same model to every task.
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Global Standard pricing starts at $2 per million short-context input tokens and $10 per million output tokens for GPT-6 Sol. GPT-6 Luna starts at $0.10 per million input tokens and $0.50 per million output tokens.
GPT-6 Astra starts at $10 per million input tokens and $50 per million output tokens. Microsoft also offers U.S. and EU Data Zone Standard deployments.
Read: GPT-6 Sol and Luna Launch With 50% Lower API Prices
The published pricing table places U.S. and EU rates above Global Standard pricing, with costs varying by model and context length.
Microsoft said Standard deployment for Astra, Sol and Luna is available across all 28 Global regions and U.S. and EU Data Zones.
Provisioned Throughput supports Astra and Sol, while Priority Processing is available for Sol across Global regions and U.S. Data Zones.
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Microsoft said the models operate with multiple safety layers covering model training, prompt and output filtering, tool calls, prompt-injection mitigation and identity controls. Microsoft Foundry also integrates monitoring, tracing and Microsoft Purview data policies.
