Head to head
Claude Opus 5 vs OpenAI: GPT-5.6 Terra
Live prices, context windows, capabilities, and measured quality — updated continuously.
Side by side
| Metric | Claude Opus 5 Anthropic | OpenAI: GPT-5.6 Terra Openai |
|---|---|---|
| Input $/M tokens | $5.00 | $2.00 |
| Output $/M tokens | $25.00 | $12.00 |
| Context window | 1.0M | 1.1M |
| Max output | 128K | 128K |
| WM Score | 93 | 88 |
| Benchmark quality | 97.2 | 90.5 |
| Hosts serving it | 5 | 3 |
| Throughput (tok/s) | 70.5 | 59 |
| Latency (ms) | 2043 | 691 |
| Vision | ||
| Tools | ||
| Reasoning | ||
| JSON mode |
Which should you pick?
OpenAI: GPT-5.6 Terra costs less per million input tokens — about 2.5× cheaper than Claude Opus 5. Claude Opus 5 scores higher on measured quality. OpenAI: GPT-5.6 Terra takes a larger context window, which matters for long documents or big codebases. Prices here are live list prices; the same model can cost less on a different host, so check the model page for the cheapest offering.