Claude Haiku 4.5 vs Grok 4.1 Fast
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Claude Haiku 4.5
Anthropic · Oct 2025
Anthropic's fast tier: Sonnet-4-class coding performance at $1/$5 and more than twice the speed.
Grok 4.1 Fast
xAI · Nov 2025
A 2M-token context window for $0.20 per million input tokens — the cheapest long-context frontier offering anywhere.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Grok 4.1 Fast works out roughly 7.3x cheaper per blended million tokens. Grok 4.1 Fast also takes 2M of context versus 200K for Claude Haiku 4.5.
Specs & pricing
| Claude Haiku 4.5 | Grok 4.1 Fast | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $1 | $0.2 |
| Output price / 1M | $5 | $0.5 |
| Context window | 200K | 2M |
| Max output | 64K | — |
| Open weights | no | no |
| Reasoning model | yes | yes |
| Multimodal input | text, image | text, image |
| Knowledge cutoff | Feb 2025 | Nov 2025 |
| Released | Oct 2025 | Nov 2025 |
| Example monthly cost* | $17.50 | $2.75 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Claude Haiku 4.5 or Grok 4.1 Fast?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Grok 4.1 Fast works out roughly 7.3x cheaper per blended million tokens. Grok 4.1 Fast also takes 2M of context versus 200K for Claude Haiku 4.5.
- Which is cheaper, Claude Haiku 4.5 or Grok 4.1 Fast?
- Claude Haiku 4.5 costs $1/$5 per million input/output tokens, while Grok 4.1 Fast costs $0.2/$0.5. For a typical workload of 10M input and 1.5M output tokens per month, that's $17.50 versus $2.75.
- Which model is better for coding, Claude Haiku 4.5 or Grok 4.1 Fast?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.
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