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Anthropic

Claude Opus 5 lands at Opus 4.8 pricing and becomes the Max default

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Anthropic has released Claude Opus 5. The company says it approaches Fable 5’s intelligence at half the price and posts industry-leading scores on the Frontier-Bench and GDPval-AA benchmarks for coding and knowledge work. On Frontier-Bench v0.1, Opus 5 beats Opus 4.8 by more than 2x at a lower cost per task.

Pricing matches Opus 4.8: $5 per million input tokens and $25 per million output tokens. A Fast mode runs about 2.5x faster at double the price. Opus 5 is now the default on Claude Max and the strongest model on Claude Pro.

In automated behavioral auditing, Opus 5 scored 2.3 on undesirable behavior, the lowest of any recent model, though it still trails Mythos 5 on cybersecurity. It’s available today across all platforms as claude-opus-5.

Claude Code

csm moves Claude Code sessions between machines

Claude Code pins your session to local disk, so starting on a MacBook and moving to an Ubuntu server loses the context. The open-source csm tool makes sessions portable via a leader server over WebSocket, with backups to any S3-compatible store. MIT-licensed.

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