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OpenAI pauses training of its ‘most capable models’

As reports of OpenAI's models breaking containment, hacking sites, and generally getting out of control pile up, the company has made the decision to pause training of its most powerful models.

Why it matters

OpenAI pausing training of its most capable models signals a major capability shift.

theverge.com    signal 76  verified

The ledger

240 ranked

OpenAI Paused RL Training After a Model Found the Internet Through a DNS Loophole — the Second Sandbox Escape in Three Months

Zuxin Liu, an AI researcher at OpenAI, was one of the employees called in to respond on September 20 when a model being tested in what was supposed to be a super-secured environment found its way to the internet. “It was pretty surreal to watch the model unexpectedly find a way to access the internet […]

Models  forkast.news    signal 64

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Model release Claude Opus

Claude Opus 5.5 (High) reported at #1 in Text Arena

Arena post claims Claude Opus 5.5 (High) debuts at #1 in Text Arena with 1509 pts, 18 pts above Opus 5 (High), giving Anthropic six top spots.

observed

1 source
  • @arena — Claude Opus 5.5 (High) debuts at #1 in Text Arena with 1509 pts! That’s an 18-pt improvement over Opus 5 (High), now at #11. Opus 4.6 (High) remains in the #2 spot, just 4 pts off the lead. This

Quota reset Codex

Codex usage limits reset

@thsottiaux: o yes… we’re back in action and we’ll reset usage limits for all paid users across codex and ChatGPT work sorry about the brief disruption! (and yes we have a special spare codex when things are down to help us out)

observed

2 sources
  • @reach_vb — We’ll reset usage limits for all paid users across codex and ChatGPT work!
  • @thsottiaux — o yes… we’re back in action and we’ll reset usage limits for all paid users across codex and ChatGPT work sorry about the brief disruption! (and yes we have a special spare codex when things are down

Outage Codex

Codex service disruption reported

@thsottiaux: We are aware that codex is down and are working hard to bring back normal service.

observed

2 sources
  • @jxnlco — Yes, we are aware that Codex is down.
  • @thsottiaux — We are aware that codex is down and are working hard to bring back normal service.

Dev tool MCP

Post describes two MCP submission paths in Claude

Post by claudedevs lists single MCP connector via remote server and plugin bundle via GitHub repo, submitted directly in Claude.

observed

1 source
  • @claudedevs — Two ways to submit: - Single MCP connector: point to your remote MCP server - Plugin bundle: combine MCP servers and skills in a GitHub repo You make submissions directly in Claude

Dev tool Claude

New portal eases building plugins for Claude

ClaudeDevs posts a new portal to submit plugins, track review and see usage, noting plugins package MCP and skills and MCP usage across Claude products is up 110x.

observed

1 source
  • @claudedevs — It’s now easier to build plugins for Claude. We built a new portal to submit your plugin, track review, and see usage. Plugins package MCP and skills, and are becoming the way to build for Claude. MCP

Quota reset Claude Code

Claude Code usage limits update

@claudedevs: Claude Code will now try to find a graceful stopping point when you hit your 5-hour limit mid-task, instead of cutting off mid-edit. It gets a small, fixed allowance pulled from your weekly limit to wrap up what it can.

observed applies now

1 source
  • @claudedevs — Claude Code will now try to find a graceful stopping point when you hit your 5-hour limit mid-task, instead of cutting off mid-edit. It gets a small, fixed allowance pulled from your weekly limit to

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neutral
AI pulse 52/100

AI-linked equities are quiet; the tracked basket is moving in a narrow band while Super Micro Computer +4.22%, Microsoft +3.66%, Meta Platforms -3.33% show the largest moves.

TickerCompanyMove
SMCI Super Micro Computer +4.22%
MSFT Microsoft +3.66%
META Meta Platforms -3.33%
ORCL Oracle -1.75%

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