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    GPT-6 Sol rumored for release the week of September 15, 2026

    A September 15, 2026 post relayed claims that people using 5.6 Sol were already being routed to GPT-6 Sol, with positive early impressions and reports of very fast performance.

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    TLDR

    Sam Altman's September 15, 2026 teaser—“big 🚢 this week” and “then for devday”—prompted a user to predict a GPT-6 Sol release that week. The user also said they'd heard GPT-6 Luna was coming. Earlier, the same user speculated that Sol would sit below Astra in the lineup but might offer close to Astra's performance at a lower cost.

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    4 Sources, first seen 15d ago

    Combined views

    771.3K

    4 Sources, first seen 15d ago

    7.4K likes
    15d ago
    first seen 15d ago
    7.4K likes
    286 comments
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    286 comments
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    Sentiment

    Positive64.2%35.8%Negative

    Summary

    Sentiment

    Positive64.2%35.8%Negative

    Positive replies welcomed the GPT-6 Sol release for its speed and performance gains, while negative replies raised concerns about high pricing, exclusivity, and risks to existing models.

    Based on 112 sentiment-bearing replies from 106 accounts across 4 conversations.

    Summary

    Positive replies welcomed the GPT-6 Sol release for its speed and performance gains, while negative replies raised concerns about high pricing, exclusivity, and risks to existing models.

    Based on 112 sentiment-bearing replies from 106 accounts across 4 conversations.

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    4 Sources

    @kimmonismusRumours are circulating that GPT-6 Sol is about to be released, which aligns with Tibo's statement that numerous major releases are scheduled for this week, enough to fill a Dev Day. As I understand it, GPT-6 Sol will be positioned below Astra, just as Opus is below Fable in the tier. Of course, the question arises: why? My guess is that GPT-6 Sol will offer significantly better value for money than Astra. It will likely be close to Astra's performance, but similar to Opus, with better rates and costs. At the same time, I'm equally excited for GPT-6 Luna, as version 5.6 Luna was incredibly good in terms of both price and performance. But who knows: perhaps we'll be surprised, and Sol will even be better than Astra in some aspects, with Astra receiving its next iterative update soon. After all, their internal model demonstrates how quickly improvements can be achieved through post-training. With Opus 5.2 just around the corner, the update cadence continues. It remains exciting!
    @AndrewCurran_GPT-6 Sol is incoming.

    4 Sources

    @kimmonismusRumours are circulating that GPT-6 Sol is about to be released, which aligns with Tibo's statement that numerous major releases are scheduled for this week, enough to fill a Dev Day. As I understand it, GPT-6 Sol will be positioned below Astra, just as Opus is below Fable in the tier. Of course, the question arises: why? My guess is that GPT-6 Sol will offer significantly better value for money than Astra. It will likely be close to Astra's performance, but similar to Opus, with better rates and costs. At the same time, I'm equally excited for GPT-6 Luna, as version 5.6 Luna was incredibly good in terms of both price and performance. But who knows: perhaps we'll be surprised, and Sol will even be better than Astra in some aspects, with Astra receiving its next iterative update soon. After all, their internal model demonstrates how quickly improvements can be achieved through post-training. With Opus 5.2 just around the corner, the update cadence continues. It remains exciting!
    @AndrewCurran_GPT-6 Sol is incoming.