Overview
- Opus 4.6 is available today on claude.ai, the API and paid plans with unchanged token pricing at $5/$25 per million input/output tokens.
- Key additions include a one‑million‑token context window in beta, research‑preview agent teams for Claude Code, and a PowerPoint sidebar preview alongside upgraded Claude in Excel and the Cowork desktop preview.
- Anthropic reports strong benchmark gains such as ARC AGI 2 at 68.8%, Terminal Bench 2.0 at 65.4% and improved OSWorld scores, with noted small regressions on SWE‑bench verified and MCP Atlas; several results are company‑reported.
- The release is positioned for finance, legal and research workflows, with Anthropic highlighting first‑pass quality improvements and partner evaluations citing lifts in multi‑source analysis and legal reasoning.
- Anthropic says it ran its most comprehensive safety tests to date with misalignment rates matching Opus 4.5, and it now offers a US‑only workload option at a 10% premium plus output lengths up to 128,000 tokens.