Claude 3.5 Haiku vs Grok-4 Fast Non-Reasoning
Comparing Claude 3.5 Haiku and Grok-4 Fast Non-Reasoning across benchmarks, pricing, and capabilities.
Anthropic · xAI · Updated for 2026
Which is better?
Claude 3.5 Haiku and Grok-4 Fast Non-Reasoning trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Grok-4 Fast Non-Reasoning is roughly 5.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok-4 Fast Non-Reasoning also accepts a larger context window (2,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude 3.5 Haiku
- you want predictable pricing at $0.80/M input and $4.00/M output
Choose Grok-4 Fast Non-Reasoning
- cost matters — it's about 5.8x cheaper per token
- you process long inputs — it offers a 2,000,000 token context window
- you want the most recent training data — it shipped Aug 2025
At a glance
The differences that matter most.
Individual benchmarks
9 reported for Claude 3.5 Haiku · 0 for Grok-4 Fast Non-Reasoning
Claude 3.5 Haiku and Grok-4 Fast Non-Reasoningdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude 3.5 Haiku ($0.80/1M tokens) is 4.0x more expensive than Grok-4 Fast Non-Reasoning ($0.20/1M tokens).
For output processing, Claude 3.5 Haiku ($4.00/1M tokens) is 8.0x more expensive than Grok-4 Fast Non-Reasoning ($0.50/1M tokens).
In conclusion, Claude 3.5 Haiku is more expensive than Grok-4 Fast Non-Reasoning.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok-4 Fast Non-Reasoning accepts 2,000,000 input tokens compared to Claude 3.5 Haiku's 200,000 tokens. Claude 3.5 Haiku can generate longer responses up to 200,000 tokens, while Grok-4 Fast Non-Reasoning is limited to 30,000 tokens.
Input capabilities
Documented input modalities across available providers
Grok-4 Fast Non-Reasoning supports multimodal inputs, whereas Claude 3.5 Haiku does not.
Grok-4 Fast Non-Reasoning can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude 3.5 Haiku
Grok-4 Fast Non-Reasoning
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude 3.5 Haiku was released on 2024-10-22, while Grok-4 Fast Non-Reasoning was released on 2025-08-28.
Grok-4 Fast Non-Reasoning is 10 months newer than Claude 3.5 Haiku.
Oct 22, 2024
1.9 years ago
Aug 28, 2025
1.0 years ago
10mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude 3.5 Haiku is available from Bedrock, Google, Anthropic. Grok-4 Fast Non-Reasoning is available from xAI.
Claude 3.5 Haiku
Grok-4 Fast Non-Reasoning
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3.5 Haiku and Grok-4 Fast Non-Reasoning side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3.5 Haiku vs Grok-4 Fast Non-Reasoning.