Grok-3 vs Claude 3 Opus Comparison

Comparing Grok-3 and Claude 3 Opus across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Grok-3 outperforms in 1 benchmarks (GPQA), while Claude 3 Opus is better at 0 benchmarks.

Grok-3 significantly outperforms across most benchmarks.

Thu Mar 19 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Grok-3 costs less

For input processing, Grok-3 ($3.00/1M tokens) is 5.0x cheaper than Claude 3 Opus ($15.00/1M tokens).

For output processing, Grok-3 ($15.00/1M tokens) is 5.0x cheaper than Claude 3 Opus ($75.00/1M tokens).

In conclusion, Claude 3 Opus is more expensive than Grok-3.*

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

Lowest available price from all providers

Thu Mar 19 2026 • llm-stats.com

Grok-3

Input tokens$3.00

Output tokens$15.00

Best providerxAI

Claude 3 Opus

Input tokens$15.00

Output tokens$75.00

Best providerAnthropic

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Context Window

Maximum input and output token capacity

Claude 3 Opus accepts 200,000 input tokens compared to Grok-3's 128,000 tokens. Claude 3 Opus can generate longer responses up to 200,000 tokens, while Grok-3 is limited to 8,000 tokens.

Grok-3

Input128,000 tokens

Output8,000 tokens

Claude 3 Opus

Input200,000 tokens

Output200,000 tokens

Thu Mar 19 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Grok-3 and Claude 3 Opus support multimodal inputs.

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

Grok-3

Text

Images

Audio

Video

Claude 3 Opus

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.

Grok-3

Proprietary

Closed source

Claude 3 Opus

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-3 was released on 2025-02-17, while Claude 3 Opus was released on 2024-02-29.

Grok-3 is 12 months newer than Claude 3 Opus.

Grok-3

Feb 17, 2025

1.1 years ago

11mo newer

Claude 3 Opus

Feb 29, 2024

2.1 years ago

Knowledge Cutoff

When training data ends

Grok-3 has a documented knowledge cutoff of 2024-11-17, while Claude 3 Opus's cutoff date is not specified.

We can confirm Grok-3's training data extends to 2024-11-17, but cannot make a direct comparison without Claude 3 Opus's cutoff date.

Grok-3

Nov 2024

Claude 3 Opus

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Provider Availability

Grok-3 is available from xAI. Claude 3 Opus is available from Anthropic, Bedrock, Google. The availability of providers can affect quality of the model and reliability.