AI models / Compare
Claude Opus 5.5 vs GPT-6.1 Sol
Claude Opus 5.5: Anthropic's recommended starting model, for long-running agentic coding and knowledge work. GPT-6.1 Sol: OpenAI's mid-priced GPT-6.1 model.
| Spec | Claude Opus 5.5 | GPT-6.1 Sol |
|---|---|---|
| Provider | Anthropic | OpenAI |
| API model ID | claude-opus-5-5 | gpt-6.1-sol |
| API price (standard) | $4.00 in / $20.00 out per 1M tokens | $2.00 in / $10.00 out per 1M tokens |
| Pricing note | Batch API is 50% off. | Short-context pricing up to 272K input tokens; higher long-context rates above that. |
| Context window | 1M tokens | Not stated |
| Max output | 128K tokens | Not stated |
| Weights | Closed (API only) | Closed (API only) |
Figures from each provider's official docs, checked 2026-10-15. Benchmarks and real-world quality vary by task, so test both on your own prompts.