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Browse related reporting, editor notes and model resources on this site. Articles are ordered by their latest update; access links and pricing details are on each model page.

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Published 2026-10-09Updated 2026-10-09

GPT-6 reaches ChatGPT Free and Go: Luna for free users, Sol for paid, Codex unchanged

OpenAI is rolling out GPT-6 with Intelligent UI to ChatGPT Free and Go users from October 8, a day after paid plans. Free and Go get GPT-6 Luna, paid plans get GPT-6 Sol, and the models behind ChatGPT Work and Codex stay the same.

Published 2026-10-09

OpenAI Puts GPT-6 in Free ChatGPT, but Sol and Astra Stay Behind the Paywall

GPT-6 is now free in ChatGPT, but Free and Go users get GPT-6 Luna, while GPT-6 Sol is for paid plans and GPT-6 Astra stays on higher tiers. The models behind Codex and Work don't change.

Published 2026-10-06Updated 2026-10-09

OpenAI is adding invisible watermarks to eligible ChatGPT and Codex text in the EU

OpenAI has outlined its response to EU AI Act text provenance rules: over the coming weeks, it will add invisible watermarks to eligible ChatGPT and Codex text outputs in the European Union. Global API customers can also opt in to text watermarking for select models, though it stays off by default. The system is called textGrain, but detection remains limited with shorter text, math-heavy content, and edits all reducing reliability.

Published 2026-10-08Updated 2026-10-09

Tibo says paid Codex users are getting another weekly usage reset

Tibo, who leads Codex and ChatGPT, posted on X that another reset is being sent to all paid accounts in the coming hours. In this context, reset means a weekly usage reset for paid Codex users, so people can use up their current quota before the new free reset lands.

Published 2026-10-07Updated 2026-10-09

Tibo, Head of Codex & ChatGPT, completes Codex usage reset: prior updates earned praise, reset followed community vote

Tibo, Head of Codex and ChatGPT, has completed a Codex usage reset. Previously, he had shipped four widely well-regarded features and math proof capabilities; after calibrating, he noted the current rules favor a reset for users, so he followed the community vote to execute it.

Published 2026-10-06Updated 2026-10-09

Tibo’s 28-Day Codex Plan Day 2: Auto-review is now free

Day 2 of Tibo’s 28-day Codex improvement plan brings a concrete change: Auto-review is now free for all users signed in with a ChatGPT account. The feature uses a second agent to review actions taken by the primary agent, reducing approval fatigue from the default sandbox mode while aiming to block high-risk or off-intent actions, with no usage drawn from the user’s plan.

Published 2026-10-06Updated 2026-10-09

Tibo’s Day 1 update: GPT-6 Astra and GPT-6.1 Sol get about 50% faster by default

Tibo shared what he called Day 1 of his 28-day improvement push on X: default speed for GPT-6 Astra and GPT-6.1 Sol has been optimized to be about 50% faster across subscription access, including OpenAI products and partners using Sign in With ChatGPT. He said no user action is needed and the change should be felt within two hours.

Published 2026-10-05Updated 2026-10-09

Tibo announces 28-day plan: daily practical Codex improvements or a full reset

Tibo announced on social media that over the next 28 days, the team will either ship a clear, useful improvement for most Codex/Work users every day, or carry out a full reset; he also noted the team is only focusing on simplification, efficiency gains, breakthrough features, or new models. Three user comments in the screenshot complain about repeated cross-chat authorization loops for Codex, criticize the limited user scope of improvements, and state the user no longer wants to renew their GPT subscription.

Published 2026-10-09Updated 2026-10-09

GPT-5.5 Leaves Codex on October 14: What to Switch to and What to Fix

GPT-5.5 leaves ChatGPT, ChatGPT Work and Codex on October 14, and GitHub Copilot drops it on October 19. For Codex, switch to GPT-6.1 Sol (gpt-6.1-sol). Here's what breaks if gpt-5.5 is pinned in config or scripts, and what stays the same.

Models and services

GPT

OpenAI ↗

Text models Image models

OpenAI's model family for text, code and image generation.

OpenAI API flagship gpt-6.1-sol costs $2 input / $10 output per 1M tokens; top-end gpt-6-astra $10/$50, lightweight gpt-6-luna $0.10/$0.50. Batch/Flex are 50% off, Fast is 2x. ChatGPT Plus is $20/month.

Official websiteDocumentationAPI Base URL

Links & pricing

Codex

OpenAI ↗

Text models

OpenAI's coding assistant for understanding code and supporting software development.

Codex comes with ChatGPT plans: Go $8, Plus $20, Pro $100/$200/$500, Business $25/seat (monthly). Via API, gpt-5.3-codex is $1.75 input / $14 output per 1M tokens.

Official websiteDocumentation

Links & pricing