Claude Opus 4.8 Released: Better Reasoning, Cheaper Fast Mode
Anthropic launches Claude Opus 4.8 with stronger reasoning, efficient tool calling, Dynamic Workflows in Claude Code, Effort Control, and 3x cheaper Fast mode.
Opus 4.8 is out
Better reasoning, more efficient tool calling, 4x less likely to miss bugs in its code without comments
- Dynamic Workflows in Claude Code — hundreds of parallel sub-agents in a single session, migrations of hundreds of thousands of lines of code
- Effort Control on claude.ai — you choose how deeply the model thinks
- Fast mode is now 3x cheaper
84% on Online-Mind2Web (best browser-agent model), a record on Legal Agent Benchmark, ahead of GPT-5.5 on Super-Agent
$5 / $25 per 1M tokens (input/output)
They’ll soon release Mythos-class models — a higher level of intelligence than Opus, launching in the coming weeks
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