Claude Opus 5.5 vs GPT-6 Luna
A direct, empirical evaluation of Claude Opus 5.5 (Anthropic) against GPT-6 Luna (OpenAI).
Claude Opus 5.5
Developed by Anthropic · Proprietary Frontier Reasoner parameters
Autonomous enterprise codebase migrations, GitHub Copilot multi-file edits, SWE-bench Pro issue resolution (89.9%), and CodeRabbit automated reviews.
GPT-6 Luna
Developed by OpenAI · Proprietary High-Throughput Distillation parameters
High-throughput document extraction, sub-second routing, customer service triage, code autocomplete, and cost-optimized reasoning via Luna Pro mode.
| Metric | Claude Opus 5.5 | GPT-6 Luna |
|---|---|---|
| SWE-bench Verified | 89.9% | 48.2% |
| MMLU-Pro | 92.4% | 74.6% |
| MATH-500 | 97.2% | 84.1% |
| Context Window | 500,000 tokens | 1,050,000 tokens |
| Input Pricing (per 1M) | $4.00 | $0.10 |
| Output Pricing (per 1M) | $20.00 | $0.50 |