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Claude 4 Opus vs Grok 3
Side-by-side intelligence, speed, price, benchmarks, strengths and weaknesses for Claude 4 Opus and Grok 3 — refreshed monthly.
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Spec
Claude 4 Opus
Grok 3
Intelligence index↑ better
Winner81
74
Speed↑ better
50 tok/s
Winner75 tok/s
Time to first token↓ better
1.4 s
Winner0.6 s
Context window↑ better
500k
Winner1M
Max output↑ better
Winner32k
16k
Input price↓ better
$8.00 / 1M tokens
Winner$3.00 / 1M tokens
Output price↓ better
$40.00 / 1M tokens
Winner$15.00 / 1M tokens
Blended price↓ better
$16.00 / 1M tokens
Winner$6.00 / 1M tokens
License
Proprietary
Proprietary
Input modalities
text, image
text, image
Output modalities
text
text
Benchmark showdown
MMLU
Claude 4 Opus
90.0
Grok 3
88.0
MMLU Pro
Claude 4 Opus
79.5
Grok 3
76.0
GPQA
Claude 4 Opus
65.0
Grok 3
62.0
MATH
Claude 4 Opus
88.0
Grok 3
88.5
HumanEval
Claude 4 Opus
95.8
Grok 3
90.0
Strengths, weaknesses and best-for
Claude 4 Opus
Strengths
- Top HumanEval
- Long, coherent outputs
- 500k context
Weaknesses
- Slower than Sonnet
- Premium price
Best for
- Long-context coding
- Tool-using agents
- Document understanding
Grok 3
Strengths
- Live X data
- 1M context
- Strong reasoning mode
Weaknesses
- Smaller ecosystem
- Less tool-use tooling
Best for
- Real-time research
- Social-aware apps
Quick verdict
- Pick Claude 4 Opus if you want it smarter.
- Pick Grok 3 if you want it faster, cheaper and longer context.
Auto-generated from the spec sheet. Always validate on your own evals.
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