OpenAI: GPT-5.2 Pro vs Anthropic: Claude Opus 4.5
Anthropic: Claude Opus 4.5 is cheaper on output tokens, while OpenAI: GPT-5.2 Pro offers a larger context window. Choose OpenAI: GPT-5.2 Pro or Anthropic: Claude Opus 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | OpenAI: GPT-5.2 Pro | Anthropic: Claude Opus 4.5 |
|---|---|---|
| Provider | Kilo Gateway | Kilo Gateway |
| Input / 1M tokens | $21.00 | $5.00 |
| Output / 1M tokens | $168.00 | $25.00 |
| Context window | 400K | 200K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Dec 2025 | Nov 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.