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日本語(JA) ChatGPTの無料ユーザーもGPT-5.6 Lunaを使用可能に、使用量無制限 https:// web.brid.gy/r/https://gigazine .net/news/20260807-chatgpt-default-luna/

OpenAI upgrades ChatGPT free tier to GPT-5.6 Luna, boosts paid features

By PulseAugur Editorial · [1 sources] ·

OpenAI has updated ChatGPT's default model for free users to GPT-5.6 Luna, replacing GPT-5.5 Instant. This new model reportedly reduces factual errors by approximately 62% compared to its predecessor. Additionally, free users will have unlimited access to GPT-5.6 Luna, and a new 'Think' button will allow for deeper processing on complex queries. Paid users will also see enhancements to GPT-5.6 Sol, with adjustable response times and improved factual accuracy. AI

IMPACT Expands access to a more capable model for free users and enhances response quality and speed for all.

RANK_REASON Frontier-lab model release with system card and expanded access details. [lever_c_demoted from frontier_release: ic=1 ai=1.0]

Read on Mastodon — fosstodon.org →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

OpenAI upgrades ChatGPT free tier to GPT-5.6 Luna, boosts paid features

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Significant
Frontier-lab model release with system card and expanded access details. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
model release, product
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
51 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [1]

  1. Mastodon — fosstodon.org TIER_1 日本語(JA) · [email protected] ·

    Free ChatGPT users can also use GPT-5.6 Luna with unlimited usage https://web.brid.gy/r/https://gigazine.net/news/20260807-chatgpt-default-luna/

    ChatGPTの無料ユーザーもGPT-5.6 Lunaを使用可能に、使用量無制限 https:// web.brid.gy/r/https://gigazine .net/news/20260807-chatgpt-default-luna/

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