Claude Haiku 5.5 vs Grok 4.1 Fast
Both have similar output pricing, while Grok 4.1 Fast offers a larger context window. Choose Claude Haiku 5.5 or Grok 4.1 Fast based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Haiku 5.5 | Grok 4.1 Fast |
|---|---|---|
| Provider | Anthropic | Ofox |
| Input / 1M tokens | $0.10 | $0.20 |
| Output / 1M tokens | $0.50 | $0.50 |
| Context window | 1M | 2M |
| Parameters | — | — |
| Open weights | — | No |
| Released | — | Nov 2025 |
| GPQA Diamond score | 89.7 | — |
| LMArena WebDev Elo score | 1585 | 1242 |
| Epoch Capabilities Index score | 159 | — |
| LiveBench score | — | 60.1 |
| LMArena (Chatbot Arena) Elo score | — | 1408 |
| LMArena Vision Elo score | — | 1201 |
FAQ
Is Claude Haiku 5.5 or Grok 4.1 Fast cheaper?
Claude Haiku 5.5 and Grok 4.1 Fast have comparable output pricing.
Which has the larger context window, Claude Haiku 5.5 or Grok 4.1 Fast?
Grok 4.1 Fast has the larger context window (2M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.