Claude Opus 5.5 vs GPT-5.6 Sol
Both have similar output pricing, while GPT-5.6 Sol offers a larger context window. Choose Claude Opus 5.5 or GPT-5.6 Sol based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Opus 5.5 | GPT-5.6 Sol |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input / 1M tokens | $4.00 | $4.00 |
| Output / 1M tokens | $20.00 | $20.00 |
| Context window | 1M | 1.1M |
| Parameters | — | — |
| Open weights | — | — |
| Released | — | — |
| LMArena (Chatbot Arena) Elo score | 1516 | 1457 |
| LMArena WebDev Elo score | 1811 | 1617 |
| LMArena Vision Elo score | 1321 | 1281 |
| GPQA Diamond score | 90.6 | 93.5 |
| Epoch Capabilities Index score | 167 | 162 |
FAQ
Is Claude Opus 5.5 or GPT-5.6 Sol cheaper?
Claude Opus 5.5 and GPT-5.6 Sol have comparable output pricing.
Which has the larger context window, Claude Opus 5.5 or GPT-5.6 Sol?
GPT-5.6 Sol has the larger context window (1.1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.