Opus 5.5 is available in Claude Code and the Claude Platform
Opus 5.5 is available in Claude Code and the Claude Platform. ClaudeDevs calls it the new daily driver for coding and agentic work, citing its intelligence, lower price, and speed.
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Claude Haiku 5.5 is now available in Claude Platform and Claude Code
Haiku 5.5 has launched across the Claude Platform and Claude Code, operating at approximately 75% lower running costs on average than Haiku 4.5. ClaudeDevs highlighted the model for use as a subagent alongside Opus 5.5 or Sonnet 5.5 for high-volume workloads.
ClaudeDevs publishes a guide for building with Claude Sonnet 5.5
ClaudeDevs says Claude Sonnet 5.5 is out and has published a guide for building with it, covering model choice against Opus 5.5, migration from Sonnet 5, and use in Claude Code.
Sonnet 5.5 shows up to 20% lower Claude Platform costs and more Claude Code usage
ClaudeDevs says Sonnet 5.5 has produced as much as 20% lower costs on the Claude Platform and 30% more usage in Claude Code. Claude calls it the second Claude 5.5 model, more than 30% faster than Sonnet 5 and up to 30% cheaper for most work.
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.
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.