Author compares GPT-6.1 Sol and Claude Opus 5.5 for AI coding roles
A technical article evaluates whether using two different AI models — one for writing code and another for reviewing it — outperforms relying on a single high-end model. The author benchmarks OpenAI's GPT-6.1 Sol against Anthropic's Claude Opus 5.5 across pricing, third-party coding benchmarks, and a 2026 cross-model review study. Sol costs half as much per token ($2/$10 per million input/output…
Key points
- GPT-6.1 Sol costs half of Claude Opus 5.5 per token and scores 56.1% on Terminal-Bench max vs Opus 59.6%
- Proposed workflow: Sol implements, Opus reviews, Sol revises — estimated 39% cheaper than Opus-only at $0.87 vs $1.42 per task
Model pages: GPT-6.1 Sol → · Claude Opus 5.5 →
The story so far
2 episodes →- Author compares GPT-6.1 Sol and Claude Opus 5.5 for AI coding rolesthis story
Are 'Two Brains' Better Than 'One Ultimate Model' for Coding AI? Thinking About the Optimal Solution for AI Development from GPT-6.1 Sol and Claude Opus 5.5|AGE WITH GRACE
note.com · 11 October 2026
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