Claude Opus series

Each model's score on the Intelligence board (Intelligence Index) on the last day it was listed

1. Claude Opus 5.5Released Sep 22, 202659.1#5 · ▲ 15
2. Claude Opus 5Released Jul 24, 202644.2#31
3. Claude Opus 4.8Released May 28, 202641.8#52 · ▲ 1.1
4. Claude Opus 4.7Released Apr 16, 202640.7#57 · ▲ 8.7
5. Claude Opus 4.6Released Feb 5, 202631.9#108 · ▲ 2.9
6. Claude Opus 4.5Released Nov 24, 202529.1#125 · ▲ 6.2
7. Claude 4.1 OpusReleased Aug 5, 202522.8#193 · ▲ 2.2
8. Claude 4 OpusReleased May 22, 202520.6#224 · ▲ 12
9. Claude 3 OpusReleased Mar 4, 20248.7#446

• Sep 172026IndustryAnthropic loosens Claude's biology guardrails for vetted scientists
• Jul 232026AI toolsClaude's voice mode just got a lot smarter
• Jun 162026AI toolsAnysphere teases a massive, from-scratch Cursor model
• May 122026AI toolsAnthropic supercharges Claude Code and rolls out multi-agent tools
• May 62026AI modelsAnthropic taps SpaceX compute to double Claude usage limits
• Jun 132025ResearchNew paper challenges Apple's claim that AI reasoning collapses