ClaudeDevs says Opus 5.5 is the first Opus with Fable 5.1-class safeguards

CClaudeDevs9/22/2026, 09:50:21

ClaudeDevs says Opus 5.5 is the first Opus with Fable 5.1-class safeguards on cyber, bio, and frontier LLM development.

Flagged requests fall back to another model. ClaudeDevs says it is working to reduce incorrect flags.

#opus-5.5 #fable-5.1 #safeguards #claudedevs

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ClaudeDevs says Opus 5.5 is 20% cheaper per token and 60% cheaper on cache reads

ClaudeDevs says Opus 5.5 costs 20% less per input and output token than Opus 5, and 60% less on cache reads. It also published a calculator for estimating Claude Code task cost from /usage.

CClaudeDevs•23m ago•

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Opus 5.5 is available in Claude Code and the Claude Platform

ClaudeDevs says Opus 5.5 is available in Claude Code and the Claude Platform, and is using it as the new daily driver for coding and agentic work, citing its intelligence, lower price, and speed.

CClaudeDevs•9/22/2026, 09:55:22•

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Claude introduces Opus 5.5 and says it costs 40% less to run than Opus 5

Opus 5.5 is the first model in the Claude 5.5 family. Claude says it matches Claude Fable 5.1 on most tasks, while ClaudeDevs says it is about 30% faster and about 40% cheaper per task than Opus 5, alongside higher Claude Code session limits.

CClaudeDevs•9/22/2026, 09:56:55•

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Claude Code cloud sessions run on Pro or Max plans and spend one-time credits first

ClaudeDevs says officially available Claude Code cloud sessions are billed on Pro or Max plans like the rest of Claude Code. Existing subscribers get an optional one-time credit of $100 on Pro or $250 on Max, which those sessions spend before normal plan usage.

CClaudeDevs•1d 16h 36m ago•

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Claude Code Projects can run threads on a local machine

ClaudeDevs has added local support to Projects in Claude Code, so threads can run on a user’s own machine. Projects were rolled out on desktop and web as conversations whose threads run in parallel cloud sessions.

CClaudeDevs•1d 19h 45m ago•

#claude-code #projects #local-execution #claude

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