Claude Sonnet 5.5 vs GPT-6.1 Sol
A direct, empirical evaluation of Claude Sonnet 5.5 (Anthropic) against GPT-6.1 Sol (OpenAI).
Claude Sonnet 5.5
Developed by Anthropic · Proprietary Frontier Dynamic Hybrid Reasoner parameters
Terminal-Bench 4.0 execution (70.6%), SWE-bench Verified coding (82.4%), GitHub Copilot multi-file edits, and low-latency autonomous agentic coding at $2/$10 pricing.
GPT-6.1 Sol
Developed by OpenAI · Proprietary Frontier Workhorse Engine parameters
Near-Astra reasoning at 1/5th price ($1.25/$5.00), SWE-bench Verified 74.8%, OSWorld 2.0 desktop agent automation, and sub-80ms Ultrafast Mode.
| Metric | Claude Sonnet 5.5 | GPT-6.1 Sol |
|---|---|---|
| SWE-bench Verified | 82.4% | 74.8% |
| MMLU-Pro | 88.4% | 92.4% |
| MATH-500 | 95.2% | 96.2% |
| Context Window | 1,000,000 tokens | 1,000,000 tokens |
| Input Pricing (per 1M) | $2.00 | $1.25 |
| Output Pricing (per 1M) | $10.00 | $5.00 |