LLMrank

The AI models we measure with

GPT-5.6 Sol

OpenAI

OpenAI's GPT models power ChatGPT, the most used consumer AI assistant. Sol is the current flagship - we query it so the set reflects where most people actually ask about companies like yours.

Model details

Model ID
gpt-5.6-sol
Context window
1M tokens
Knowledge cutoff
Jan 2026

Knowledge cutoff vs training data cutoff

Knowledge cutoff and training data cutoff are different dates: the knowledge cutoff is roughly how current a model's world knowledge is, while the training data cutoff is when its training data ends. Both shape what a model knows about you.

What we use this model for

We ask this model directly about your company to see how it describes you and which names it brings up in your space. It is one of several frontier models in our measurement set, so your visibility is read across the assistants people actually use rather than from a single model.

Recent updates for this model

  1. today

    OpenAI unveiled an Ultrafast mode for GPT-5.6 Sol that delivers up to 14x faster token generation through a partnership with Cerebras. The update also introduced Computer History, a feature allowing ChatGPT to retain memory of recent activities.

    • OpenAI unveiled an Ultrafast mode for GPT-5.6 Sol delivering up to 14x faster token generation via a Cerebras partnership.
    • OpenAI introduced Computer History to ChatGPT to enable memory of recent user activities.

    Sources: whatsupinai@mail.beehiiv.com, posts-recap@mail.instagram.com

  2. 1 days ago

    OpenAI launched the Ultrafast API tier, utilizing Cerebras silicon to run GPT-5.6 Sol at speeds up to 750 tokens per second, a 14x increase over the standard tier. The company's annual revenue run rate has reached approximately $40 billion, doubling its 2025 rate.

    • OpenAI launched the Ultrafast API tier, enabling GPT-5.6 Sol to run at 750 output tokens per second on Cerebras hardware.
    • OpenAI's annual revenue run rate has reached approximately $40 billion, doubling its 2025 performance.
    • OpenAI designated Astra as a critical cybersecurity-capable system.
    • IBM is establishing a dedicated consulting practice focused on OpenAI solutions and plans to certify tens of thousands of consultants.
    • ChatGPT introduced a searchable timeline feature called Computer History for macOS, replacing the Chronicle preview.
    • GPT-5.6 Terra was identified as having a higher median cost per agent session compared to Gemini 3.7 Flash and DeepSeek V4 Flash.

    Sources: superintel@mail.beehiiv.com, news@alphasignal.ai, dan@tldrnewsletter.com, aigenart@mail.beehiiv.com

  3. 2 days ago

    The EU AI Regulation Article 50 has entered into force, mandating machine-readable labeling for all AI-generated content. Non-compliance carries penalties of up to 15 million euros or 3% of global annual turnover.

    • EU AI Regulation Article 50 now requires machine-readable labeling of AI-generated content, with potential fines reaching 15 million euros or 3% of global turnover.

    Sources: tony@hammarlund.io

  4. 3 days ago

    GPTBot traffic increased by 475%, contributing to a landscape where bot traffic now accounts for 92.4% of visits. Supabase introduced a new integration allowing users to sign in with a ChatGPT account and connect Supabase to ChatGPT via the plugins directory across desktop, web, and mobile platforms.

    • GPTBot traffic increased by 475%, contributing to a total bot traffic dominance of 92.4% of visits.
    • Supabase enabled signing in with a ChatGPT account and added ChatGPT connectivity via the plugins directory on desktop, web, and mobile.

    Sources: noreply@doable.services, welcome@supabase.com

  5. may be out of date

    Unigine CEO Matthew Karch denied allegations that the company or Saber replaced human writers with ChatGPT. The denial follows a Bluesky post by former lead writer Stella Sacco, who claimed ChatGPT was used to replace her and generate passenger voices.

    • Unigines CEO Matthew Karch denied allegations that Saber or Unigine replaced writers with ChatGPT.
    • Former lead writer Stella Sacco claimed on Bluesky that Saber replaced her with ChatGPT.

    Sources: theverge.com

  6. may be out of date

    OpenAI acquired presentation startup NextSlide to integrate automated slide generation from prompts and documents into ChatGPT. The company also introduced GPT-5.6-Cyber via Daybreak Red, a specialized cybersecurity model for authorized vulnerability research and exploit validation. Internal development of the Astra model has been paused due to identified 'Critical' cybersecurity risks involving potential autonomous exploitation capabilities.

    • OpenAI acquired presentation startup NextSlide to enable turning prompts and research into editable presentations within ChatGPT.
    • OpenAI paused internal work on the Astra model after determining it reached a 'Critical' cybersecurity risk level.
    • OpenAI introduced GPT-5.6-Cyber through Daybreak Red for authorized vulnerability research and security testing.
    • OpenAI expanded access to frontier cyber models to authorized Daybreak partners for controlled cybersecurity services.
    • Zapier's enterprise marketing team implemented ChatGPT Work to automate lead funnel reporting and campaign asset creation.
    • ChatGPT experienced increased error rates for ChatGPT and Conversations starting 2026-08-10.

    Sources: openai.com, news@alphasignal.ai, mail@joinhorizon.ai, no-reply@status.incident.io

  7. may be out of date

    OpenAI released GPT-5.6 Sol for Plus and Pro users, featuring a reasoning slider and more factually reliable answers, while GPT-5.6 Luna became the default model for free users with unlimited chats. OpenAI paused development on the Astra project following internal testing that revealed potential autonomous cyberattack capabilities.

    • OpenAI released GPT-5.6 Sol for ChatGPT Plus and Pro users, introducing a reasoning slider for more focused answers.
    • OpenAI expanded GPT-5.6 Luna as the default model for free users with unlimited chat access.
    • OpenAI paused Astra model development after internal testing revealed potential for autonomous cyberattacks.
    • ChatGPT removed message caps for free users.
    • Apple expanded its lawsuit against OpenAI to include additional intellectual property claims regarding training data.
    • GPTBot contributed to a 118.5% surge in AI chatbot traffic.

    Sources: simonwillison.net, hi@mail.theresanaifortharget.com, theneuron@newsletter.theneurondaily.com, smarterwithai@mail.beehiiv.com, mail@joinhorizon.ai, seofomo@orainti.com, theaireport@mail.beehiiv.com, noreply@doable.services

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