Model Comparison

Claude Sonnet 4.6 vs Grok-4.20 Beta Reasoning

Comparing Claude Sonnet 4.6 and Grok-4.20 Beta Reasoning across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Claude Sonnet 4.6 and Grok-4.20 Beta 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-4.20 Beta Reasoning costs less

For input processing, Claude Sonnet 4.6 ($3.00/1M tokens) is 1.5x more expensive than Grok-4.20 Beta Reasoning ($2.00/1M tokens).

For output processing, Claude Sonnet 4.6 ($15.00/1M tokens) is 2.5x more expensive than Grok-4.20 Beta Reasoning ($6.00/1M tokens).

In conclusion, Claude Sonnet 4.6 is more expensive than Grok-4.20 Beta Reasoning.*

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

Lowest available price from all providers
Sat Apr 18 2026 • llm-stats.com
Anthropic
Claude Sonnet 4.6
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
xAI
Grok-4.20 Beta Reasoning
Input tokens$2.00
Output tokens$6.00
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok-4.20 Beta Reasoning accepts 2,000,000 input tokens compared to Claude Sonnet 4.6's 200,000 tokens. Claude Sonnet 4.6 can generate longer responses up to 64,000 tokens, while Grok-4.20 Beta Reasoning is limited to 30,000 tokens.

Anthropic
Claude Sonnet 4.6
Input200,000 tokens
Output64,000 tokens
xAI
Grok-4.20 Beta Reasoning
Input2,000,000 tokens
Output30,000 tokens
Sat Apr 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 4.6 and Grok-4.20 Beta Reasoning support multimodal inputs.

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

Claude Sonnet 4.6

Text
Images
Audio
Video

Grok-4.20 Beta 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 Sonnet 4.6

Proprietary

Closed source

Grok-4.20 Beta Reasoning

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 4.6 was released on 2026-02-17, while Grok-4.20 Beta Reasoning was released on 2026-03-09.

Grok-4.20 Beta Reasoning is 1 month newer than Claude Sonnet 4.6.

Claude Sonnet 4.6

Feb 17, 2026

2 months ago

Grok-4.20 Beta Reasoning

Mar 9, 2026

1 months ago

2w newer

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 Sonnet 4.6 is available from Anthropic. Grok-4.20 Beta Reasoning is available from xAI.

Claude Sonnet 4.6

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

Grok-4.20 Beta Reasoning

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $6.00/1M
* 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 Sonnet 4.6
xAI
Grok-4.20 Beta Reasoning

FAQ

Common questions about Claude Sonnet 4.6 vs Grok-4.20 Beta Reasoning

Claude Sonnet 4.6 (Anthropic) and Grok-4.20 Beta 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 Sonnet 4.6 scores Tau2 Telecom: 97.9%, Tau2 Retail: 91.7%, GPQA: 89.9%, MMMLU: 89.3%, SWE-Bench Verified: 79.6%.
Grok-4.20 Beta Reasoning is 1.5x cheaper for input tokens. Claude Sonnet 4.6 costs $3.00/M input and $15.00/M output via anthropic. Grok-4.20 Beta Reasoning costs $2.00/M input and $6.00/M output via xai.
Claude Sonnet 4.6 supports 200K tokens and Grok-4.20 Beta 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 (200K vs 2.0M), input pricing ($3.00 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.
Claude Sonnet 4.6 is developed by Anthropic and Grok-4.20 Beta Reasoning is developed by xAI.