Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance across reasoning, coding, and comp…
Model details →Anthropic: Claude Haiku 4.5 vs xAI: Grok 4
Anthropic: Claude Haiku 4.5 wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not exposed, reasoning cannot be disabled, and the reasoning ef…
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Haiku 4.5 | xAI: Grok 4 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 200K | 256K | 🏆 xAI: Grok 4 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.00 | $3.00 | 🏆 Anthropic: Claude Haiku 4.5 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $5.00 | $15.00 | 🏆 Anthropic: Claude Haiku 4.5 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Anthropic: Claude Haiku 4.5 better than xAI: Grok 4?
Anthropic: Claude Haiku 4.5 wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Anthropic: Claude Haiku 4.5 and xAI: Grok 4?
Input: $1.00 vs $3.00 per 1M tokens. Output: $5.00 vs $15.00 per 1M tokens.
What context windows do Anthropic: Claude Haiku 4.5 and xAI: Grok 4 support?
Anthropic: Claude Haiku 4.5 supports up to 200K tokens. xAI: Grok 4 supports up to 256K tokens.
Do both Anthropic: Claude Haiku 4.5 and xAI: Grok 4 support tool calling?
Anthropic: Claude Haiku 4.5: yes. xAI: Grok 4: yes.