Model Comparison

Claude 3.5 Sonnet vs Grok-2

Claude 3.5 Sonnet significantly outperforms across most benchmarks. Grok-2 is 1.5x cheaper per token.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

8 benchmarks

Claude 3.5 Sonnet outperforms in 7 benchmarks (DocVQA, GPQA, HumanEval, MATH, MMLU, MMLU-Pro, MMMU), while Grok-2 is better at 1 benchmark (MathVista).

Claude 3.5 Sonnet significantly outperforms across most benchmarks.

Sat Mar 28 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Grok-2 costs less

For input processing, Claude 3.5 Sonnet ($3.00/1M tokens) is 1.5x more expensive than Grok-2 ($2.00/1M tokens).

For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 1.5x more expensive than Grok-2 ($10.00/1M tokens).

In conclusion, Claude 3.5 Sonnet is more expensive than Grok-2.*

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

Lowest available price from all providers
Sat Mar 28 2026 • llm-stats.com
Anthropic
Claude 3.5 Sonnet
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
xAI
Grok-2
Input tokens$2.00
Output tokens$10.00
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude 3.5 Sonnet accepts 200,000 input tokens compared to Grok-2's 128,000 tokens. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while Grok-2 is limited to 8,000 tokens.

Anthropic
Claude 3.5 Sonnet
Input200,000 tokens
Output200,000 tokens
xAI
Grok-2
Input128,000 tokens
Output8,000 tokens
Sat Mar 28 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude 3.5 Sonnet and Grok-2 support multimodal inputs.

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

Claude 3.5 Sonnet

Text
Images
Audio
Video

Grok-2

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 3.5 Sonnet

Proprietary

Closed source

Grok-2

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3.5 Sonnet was released on 2024-10-22, while Grok-2 was released on 2024-08-13.

Claude 3.5 Sonnet is 2 months newer than Grok-2.

Claude 3.5 Sonnet

Oct 22, 2024

1.4 years ago

2mo newer
Grok-2

Aug 13, 2024

1.6 years 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 3.5 Sonnet is available from Anthropic, Bedrock, Google. Grok-2 is available from xAI.

Claude 3.5 Sonnet

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
google logo
Google
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

Grok-2

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Higher DocVQA score (95.2% vs 93.6%)
Higher GPQA score (67.2% vs 56.0%)
Higher HumanEval score (93.7% vs 88.4%)
Higher MATH score (78.3% vs 76.1%)
Higher MMLU score (90.4% vs 87.5%)
Higher MMLU-Pro score (77.6% vs 75.5%)
Higher MMMU score (68.3% vs 66.1%)
xAI
Less expensive input tokens
Less expensive output tokens
Higher MathVista score (69.0% vs 67.7%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3.5 Sonnet
xAI
Grok-2

FAQ

Common questions about Claude 3.5 Sonnet vs Grok-2

Claude 3.5 Sonnet significantly outperforms across most benchmarks. Claude 3.5 Sonnet is made by Anthropic and Grok-2 is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Claude 3.5 Sonnet scores GSM8k: 96.4%, DocVQA: 95.2%, AI2D: 94.7%, HumanEval: 93.7%, BIG-Bench Hard: 93.1%. Grok-2 scores DocVQA: 93.6%, HumanEval: 88.4%, MMLU: 87.5%, MATH: 76.1%, MMLU-Pro: 75.5%.
Grok-2 is 1.5x cheaper for input tokens. Claude 3.5 Sonnet costs $3.00/M input and $15.00/M output via anthropic. Grok-2 costs $2.00/M input and $10.00/M output via xai.
Claude 3.5 Sonnet supports 200K tokens and Grok-2 supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (200K vs 128K), input pricing ($3.00 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.
Claude 3.5 Sonnet is developed by Anthropic and Grok-2 is developed by xAI.