Anthropic vs xAI (Grok)

Grok 4.1 Fast scores 75/100 versus Claude Sonnet 4.6's 66/100, likely due to xAI's focus on speed optimization and web search integration (10/10 models support it versus Anthropic's 12/13). The performance gap suggests xAI prioritizes raw benchmark performance over capability breadth, as evidenced by only 50% of their models supporting vision compared to Anthropic's 100% coverage.

Anthropic's premium pricing reflects their comprehensive capability coverage across all 13 models: 100% vision support, 85% reasoning coverage, and universal function calling. Their flagship models also offer 2x the context window of xAI's best (1M vs 2M tokens), making them suitable for document-heavy enterprise workflows where xAI's faster but more limited models would require chunking strategies.

xAI edges out Anthropic with 80% of models supporting both reasoning (8/10) and universal web search coverage (10/10), at prices starting from $0.50 per 1M tokens. Anthropic covers reasoning in 85% of models (11/13) but lacks universal web search (92% coverage), while their cheapest option at $1.25 per 1M tokens is 2.5x more expensive than xAI's entry point.

Anthropic's broader portfolio provides more granular price-performance options between $1.25 and $150 per 1M tokens, with consistent capability coverage across all tiers. Every Anthropic model supports vision and function calling (13/13), while xAI's capability support varies significantly - only 5/10 models have vision and 9/10 support function calling, creating potential migration friction as requirements evolve.