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Claude Opus 4.1 vs Grok 4 Fast
Comprehensive side-by-side LLM comparison
Grok 4 Fast leads with 9.4% higher average benchmark score. Grok 4 Fast offers 1.8M more tokens in context window than Claude Opus 4.1. Grok 4 Fast is $89.30 cheaper per million tokens. Claude Opus 4.1 is available on 4 providers. Overall, Grok 4 Fast is the stronger choice for coding tasks.
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Anthropic
Claude Opus 4.1 represents an iteration within the Claude 4 Opus line, built to deliver refined performance in complex reasoning and analysis tasks. Developed as part of Anthropic's flagship tier, it incorporates improvements to the foundational capabilities that define the Opus family of models.
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xAI
Grok 4 Fast is a multimodal language model developed by xAI. It achieves strong performance with an average score of 73.0% across 7 benchmarks. It excels particularly in SimpleQA (95.0%), HMMT 2025 (93.3%), AIME 2025 (92.0%). With a 2.0M token context window, it can handle extensive documents and complex multi-turn conversations. The model is available through 1 API provider. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents xAI's latest advancement in AI technology.
23 days newer
Claude Opus 4.1
Anthropic
2025-08-05
Grok 4 Fast
xAI
2025-08-28
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Pricing Comparison
Cost per million tokens (USD)
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Claude Opus 4.1
Input:$15.00
Output:$75.00
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Grok 4 Fast
Input:$0.20
Output:$0.50($89.30 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Claude Opus 4.1
Average Score:79.5%
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Grok 4 Fast
Average Score:88.9%(+9.4%)
Provider Availability & Performance
Available providers and their performance metrics
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Claude Opus 4.1
4 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.5ms
Bedrock
Throughput: 120 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
ZeroEval
Throughput: 42 tok/s
Latency: 0.4ms
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Claude Opus 4.1
Avg Score:79.5%
Providers:4
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Grok 4 Fast
Avg Score:88.9%(+9.4%)
Providers:1