Baidu: ERNIE 4.5 21B A3B Thinking vs Anthropic: Claude Opus 4.5
Baidu: ERNIE 4.5 21B A3B Thinking is cheaper on output tokens, while Anthropic: Claude Opus 4.5 offers a larger context window. Choose Baidu: ERNIE 4.5 21B A3B Thinking or Anthropic: Claude Opus 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Baidu: ERNIE 4.5 21B A3B Thinking | Anthropic: Claude Opus 4.5 |
|---|---|---|
| Provider | Kilo Gateway | Kilo Gateway |
| Input / 1M tokens | $0.07 | $5.00 |
| Output / 1M tokens | $0.28 | $25.00 |
| Context window | 131K | 200K |
| Parameters | — | — |
| Open weights | Yes | No |
| Released | Sep 2025 | Nov 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.