Model Comparison

Claude Opus 4.6 vs Grok-4 Fast Non-Reasoning

Comparing Claude Opus 4.6 and Grok-4 Fast Non-Reasoning across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Claude Opus 4.6 and Grok-4 Fast Non-Reasoning don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Grok-4 Fast Non-Reasoning costs less

For input processing, Claude Opus 4.6 ($5.00/1M tokens) is 25.0x more expensive than Grok-4 Fast Non-Reasoning ($0.20/1M tokens).

For output processing, Claude Opus 4.6 ($25.00/1M tokens) is 50.0x more expensive than Grok-4 Fast Non-Reasoning ($0.50/1M tokens).

In conclusion, Claude Opus 4.6 is more expensive than Grok-4 Fast Non-Reasoning.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri Apr 17 2026 • llm-stats.com
Anthropic
Claude Opus 4.6
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
xAI
Grok-4 Fast Non-Reasoning
Input tokens$0.20
Output tokens$0.50
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok-4 Fast Non-Reasoning accepts 2,000,000 input tokens compared to Claude Opus 4.6's 1,000,000 tokens. Claude Opus 4.6 can generate longer responses up to 128,000 tokens, while Grok-4 Fast Non-Reasoning is limited to 30,000 tokens.

Anthropic
Claude Opus 4.6
Input1,000,000 tokens
Output128,000 tokens
xAI
Grok-4 Fast Non-Reasoning
Input2,000,000 tokens
Output30,000 tokens
Fri Apr 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4.6 and Grok-4 Fast Non-Reasoning support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Opus 4.6

Text
Images
Audio
Video

Grok-4 Fast Non-Reasoning

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Opus 4.6

Proprietary

Closed source

Grok-4 Fast Non-Reasoning

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.6 was released on 2026-02-05, while Grok-4 Fast Non-Reasoning was released on 2025-08-28.

Claude Opus 4.6 is 5 months newer than Grok-4 Fast Non-Reasoning.

Claude Opus 4.6

Feb 5, 2026

2 months ago

5mo newer
Grok-4 Fast Non-Reasoning

Aug 28, 2025

7 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude Opus 4.6 is available from Anthropic. Grok-4 Fast Non-Reasoning is available from xAI.

Claude Opus 4.6

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

Grok-4 Fast Non-Reasoning

xai logo
xAI
Input Price:Input: $0.20/1MOutput Price:Output: $0.50/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
xAI
Larger context window (2,000,000 tokens)
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.6
xAI
Grok-4 Fast Non-Reasoning

FAQ

Common questions about Claude Opus 4.6 vs Grok-4 Fast Non-Reasoning

Claude Opus 4.6 (Anthropic) and Grok-4 Fast Non-Reasoning (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.
Claude Opus 4.6 scores Vending-Bench 2: 100.0%, AIME 2025: 99.8%, Tau2 Telecom: 99.3%, Graphwalks parents >128k: 95.4%, MRCR v2 (8-needle): 93.0%.
Grok-4 Fast Non-Reasoning is 25.0x cheaper for input tokens. Claude Opus 4.6 costs $5.00/M input and $25.00/M output via anthropic. Grok-4 Fast Non-Reasoning costs $0.20/M input and $0.50/M output via xai.
Claude Opus 4.6 supports 1.0M tokens and Grok-4 Fast Non-Reasoning supports 2.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (1.0M vs 2.0M), input pricing ($5.00 vs $0.20/M). See the full comparison above for benchmark-by-benchmark results.
Claude Opus 4.6 is developed by Anthropic and Grok-4 Fast Non-Reasoning is developed by xAI.