Compare/Claude 3 Sonnet vs Grok 3

Claude 3 SonnetvsGrok 3

Side-by-side comparison of pricing, 12 benchmarks, and generation speed.

Anthropic

Claude 3 Sonnet

Input
$3/M
Output
$15/M
Speed
TTFT
xAI

Grok 3

Input
$3/M
Output
$15/M
Speed
70 tok/s
TTFT
0.33s

Winner by Category

Cheaper
Tie
Faster (tok/s)
Grok 3
Lower Latency
Claude 3 Sonnet
Benchmarks (0-12)
Grok 3

Pricing Comparison

MetricClaude 3 SonnetGrok 3
Input ($/M tokens)$3$3
Output ($/M tokens)$15$15
Cost for 1M input + 100K output tokens:
Claude 3 Sonnet$4.50
Grok 3$4.50

Speed Comparison

Output Speed (tokens/s) — higher is better
Claude 3 Sonnet
Grok 3
70 tok/s
Time to First Token (seconds) — lower is better
Claude 3 Sonnet
Grok 3
0.33s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
10.325.2
Coding Index
19.8
Math Index
58.0
GPQA Diamond
40.0%69.3%
MMLU-Pro
57.9%79.9%
LiveCodeBench
17.5%42.5%
AIME 2025
58.0%
MATH-500
41.4%87.0%
Humanity's Last Exam
3.8%5.1%
SciCode
22.9%36.8%
IFBench
46.9%
TerminalBench
11.4%
Claude 3 Sonnet0 wins
12 winsGrok 3

Frequently Asked Questions

Which is cheaper, Claude 3 Sonnet or Grok 3?

Both models have similar pricing. Check the detailed breakdown above for input vs output token costs.

Which model performs better on benchmarks?

Grok 3 wins 12 out of 12 benchmarks compared to 0 for Claude 3 Sonnet. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

Grok 3 generates tokens faster at 70 tok/s vs 0 tok/s. Claude 3 Sonnet also has lower time-to-first-token (0.00s vs 0.33s).

When should I use Claude 3 Sonnet vs Grok 3?

Choose based on your priorities: both are similarly priced, Grok 3 for stronger benchmark performance, and Grok 3 for faster generation. For latency-sensitive apps, check the TTFT comparison above.