Side-by-side technical and economic comparison between Anthropic's Claude Opus 5 and xAI's Grok 4.6 Mini.
| Metric | Claude Opus 5 | Grok 4.6 Mini | Advantage |
|---|---|---|---|
| Provider Organization | Anthropic | xAI | — |
| Standard Input / 1M | $5.00 | $0.40 | Grok 4.6 Mini (92% lower) |
| Cached Input / 1M | $0.50 | $0.10 | Grok 4.6 Mini lower |
| Output / 1M | $25.00 | $1.60 | Grok 4.6 Mini lower |
| Context Window | 1M | 512k | Claude Opus 5 (1M) |
| Max Generation Tokens | 16.4k | 64k | Grok 4.6 Mini |
| Tokenizer Family | Anthropic Claude BPE (~65k vocabulary) | OpenAI o200k_base legacy (200k vocabulary) | — |
Opt for Claude Opus 5 when your engineering requirements prioritize Anthropic's ecosystem, specific tokenizer efficiencies (Calibrated Claude Tokenizer (±3%)), or when your expected prompt-to-completion ratios favor its $5/M input rate.
Opt for Grok 4.6 Mini when looking for xAI's tooling integration, specific context window depth (512k tokens), or when output generation volume favors its $1.6/M rate.