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OpenAI upgrades ChatGPT with GPT-5.6 Sol and Luna models, adds reasoning slider

By PulseAugur Editorial · [5 sources] ·

OpenAI has released an updated version of its GPT-5.6 Sol model for ChatGPT, enhancing intelligence and reasoning capabilities for paid users. Plus and Pro subscribers can now utilize a slider to control the model's reasoning effort, aiming for more factual and focused responses. Free and Go users will gain access to GPT-5.6 Luna for unlimited text chats, while the Work and Codex versions of GPT-5.6 Sol remain unchanged. AI

IMPACT Enhances ChatGPT's reasoning and factual accuracy, offering tiered access to new capabilities for both paid and free users.

RANK_REASON Frontier-lab model release with system card.

Read on X — OpenAI →

AI-generated summary · Google Gemini · from 5 sources. How we write summaries →

OpenAI upgrades ChatGPT with GPT-5.6 Sol and Luna models, adds reasoning slider

COVERAGE [5]

  1. X — OpenAI TIER_1 English(EN) · OpenAI ·

    Plus and Pro users can access the updated version of GPT‑5.6 Sol in ChatGPT along with the new slider starting today.

    Plus and Pro users can access the updated version of GPT‑5.6 Sol in ChatGPT along with the new slider starting today. This version of GPT-5.6 Sol is for everyday chats, so it will only be available in the Chat experience in ChatGPT. The version of GPT-5.6 Sol that powers Work

  2. X — OpenAI TIER_1 English(EN) · OpenAI ·

    In addition to the upgrade in intelligence with GPT-5.6 Luna, Free and Go users can now use the “Think” button for more reasoning on harder questions.

    In addition to the upgrade in intelligence with GPT-5.6 Luna, Free and Go users can now use the “Think” button for more reasoning on harder questions.

  3. X — OpenAI TIER_1 English(EN) · OpenAI ·

    Plus and Pro users also now have a slider to choose how much reasoning effort ChatGPT puts into each response.

    Plus and Pro users also now have a slider to choose how much reasoning effort ChatGPT puts into each response. We think it’s easier to use, and we’re listening to your feedback. https://t.co/u6HqhZpMts

  4. X — OpenAI TIER_1 English(EN) · OpenAI ·

    The new GPT-5.6 Sol powers all chats for paid users, including Instant, creating one consistent experience.

    The new GPT-5.6 Sol powers all chats for paid users, including Instant, creating one consistent experience. In our high-stakes factuality evaluation covering finance, medicine and law, the new GPT‑5.6 Sol produced 68% fewer responses with factual errors than GPT‑5.5 Instant. ht…

  5. X — OpenAI TIER_1 English(EN) · OpenAI ·

    We’re making better intelligence easier to access in ChatGPT for everyone:

    We’re making better intelligence easier to access in ChatGPT for everyone: - GPT-5.6 Sol now powers both Instant and deep reasoning for Plus & Pro users, delivering more factual, focused responses. - Free & Go users get unlimited text chats with GPT-5.6 Luna starting to…

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