AI Models · Compare
Claude 4 Opus vs Claude 4 Sonnet
Side-by-side intelligence, speed, price, benchmarks, strengths and weaknesses.
Anthropic
Claude 4 Opus
ProprietaryFeb 2026
Anthropic’s 2026 flagship — best-in-class on code and long-horizon agents.
Anthropic
Claude 4 Sonnet
ProprietaryFeb 2026
The Anthropic sweet spot — Opus-class coding at a fraction of the price.
Head to head
Spec
Claude 4 Opus
Claude 4 Sonnet
Intelligence index↑ better
Winner81
75
Speed↑ better
50 tok/s
Winner95 tok/s
Time to first token↓ better
1.4 s
Winner0.85 s
Context window↑ better
500k
500k
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
Claude 4 Sonnet
88.5
MMLU Pro
Claude 4 Opus
79.5
Claude 4 Sonnet
75.2
GPQA
Claude 4 Opus
65.0
Claude 4 Sonnet
58.0
MATH
Claude 4 Opus
88.0
Claude 4 Sonnet
82.0
HumanEval
Claude 4 Opus
95.8
Claude 4 Sonnet
93.2
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
Claude 4 Sonnet
Strengths
- Best $/HumanEval ratio
- Fast
- 500k context
Weaknesses
- Behind Opus on hardest reasoning
Best for
- Production coding tools
- Long-context RAG
- Tool use
Quick verdict
- Pick Claude 4 Opus if you want it smarter.
- Pick Claude 4 Sonnet if you want it faster and cheaper.
Auto-generated from the spec sheet. Always validate on your own evals.
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