GPT-6 Sol (Azure)

GPT-6 Sol is an OpenAI model released as part of the broader GPT-6 family, designed to extend the capabilities of the flagship GPT-6 Astra into a faster and more economical tier. OpenAI trained Sol using methods similar to those behind Astra, carrying forward Astra's progress in professional work, factuality, coding, computer use, and alignment while serving users at lower cost through improved caching and inference. Microsoft added GPT-6 Sol to the generally available lineup in Microsoft Foundry on the same announcement day, positioning it for production AI agents that need dependable general-purpose intelligence without stepping up to Astra's premium tier.

The practical appeal of GPT-6 Sol lies in balancing capability with efficiency for everyday workloads. Within the GPT-6 lineup, Astra remains the top choice for the most demanding reasoning, software engineering, and computer-use tasks, while Luna targets high-volume and preparatory work, and Sol sits in the middle as an excellent general-purpose option. By distributing Astra's advances across Sol and Luna, OpenAI aims to make frontier-quality AI practical at a wider range of scales, rhythms, and budgets, which makes Sol a natural fit for organizations building agents in Azure Foundry that want strong performance for routine production tasks without paying flagship-tier costs.

LLM Gatewayazure/gpt-6-solgpt-sol

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Quick Info

Provider: LLM Gateway
Model key: azure/gpt-6-sol
Release date: Sep 22, 2026
Last updated: Sep 22, 2026
Knowledge cutoff: 2026-04-20
Input modalities
Output modalities
Capabilities

Cost

Input token cost: $2.00
Output token cost: $10.00

Limits

Input tokens: 922,000 tokens
Output tokens: 128,000 tokens
Context window: 1,050,000 tokens

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Rates are shown per one million tokens. Combined means one million input plus one million output tokens.

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Latest news about GPT-6 Sol (Azure)

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Coverage

OpenAI has released updated versions of its smaller GPT-6 models, Sol and Luna, positioning them as efficient extensions of the recently launched GPT-6 Astra flagship. The company frames the new releases as making the intelligence introduced with Astra more accessible and affordable across a wider range of tasks. API pricing for the GPT-6 Sol and Luna series is set at half the cost of the prior 5.6 generation, an improvement OpenAI credits to gains in caching and inference. The company claims Sol produces about half as many factual errors as its predecessor, reaching Astra-level reliability, and that both models handle coding and document tasks substantially better than Anthropic's competing Fable and Opus offerings. Luna targets high-volume clerical work such as summarization and extraction, while Sol is aimed at complex coding. The new models are rolling out to ChatGPT Work, Codex, the ChatGPT API, and Luna specifically to the desktop app and Free and Go users.

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Coverage

OpenAI officially introduced GPT-6 Sol and GPT-6 Luna on September 22, 2026, expanding the GPT-6 model family it launched earlier in September with GPT-6 Astra. According to the supplied excerpt, OpenAI trained both new models using methods similar to those behind GPT-6 Astra, extending Astra's advances in professional The excerpt provides detailed API specifications: both Sol and Luna list a 1,050,000-token context window and a 128,000-token maximum output, accept text and image input with text output, and support reasoning effort settings from none through max (medium as default). Sol carries an April 20, 2026 knowledge cutoff and