Claude Opus 5.5 | First impressions and comparison with GPT-6 Sol

https://arena.ai/agent After hours of testing, and hundreds of dollars in tokens, Peter doesn’t think comparing Claude Opus 5.5 to GPT-6 Sol even makes sense anymore. They're just fundamentally different models playing different roles in your stack. Peter also shares his theory on what this says about Anthropic's RL strategy — and why Opus 5.5 might be making Anthropic's own flagship, Fable, hard to justify. Peter’s prompts: https://github.com/petergpt/3d-prompt-collection 0:00 – Intro: Opus 5.5 0:16 – Why this comparison doesn't really make sense 1:00 – Golden Gate Bridge: Opus vs Sol side by side 2:02 – The shocking numbers: tokens, cost & lines of code 3:29 – Stonehenge: 7 hours and $61 later 4:35 – The $90 castle vs the $1.50 castle 5:14 – The octopus that looks like real footage 6:04 – More generations (6 hours for a bear?!) 7:41 – Is Opus actually competing with Fable? 8:12 – London over 2,000 years: Londinium to The Shard 10:48 – Tower of Babel + a theory on Anthropic's RL advantage 14:20 – Manhattan & Istanbul: which model for which use case 15:53 – HTML animated shorts: Claude's secret superpower 16:18 – Truman Show: the edge of the world 17:34 – The painted Rickroll 18:23 – Freddie Mercury at Wembley 19:05 – Distracted boyfriend & Usain Bolt 19:38 – Icarus: like an animated children's book 20:22 – Fall of the Berlin Wall 20:46 – The Trojan Horse vase (with the full prompt) 23:19 – Final verdict: two totally different categories #ClaudeOpus55 #GPT6 #Anthropic #AI #AICoding #arenaai