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Claude 4 Opus vs DeepSeek R1
Side-by-side intelligence, speed, price, benchmarks, strengths and weaknesses for Claude 4 Opus and DeepSeek R1 — refreshed monthly.
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Pick any two modelsAnthropic
Claude 4 Opus
ProprietaryFeb 2026
Anthropic’s 2026 flagship — best-in-class on code and long-horizon agents.
DeepSeek
DeepSeek R1
Open sourceJan 2025
Open-weights reasoning model that matches o1 at 1/25 the price.
Head to head
Spec
Claude 4 Opus
DeepSeek R1
Intelligence index↑ better
Winner81
73
Speed↑ better
50 tok/s
Winner60 tok/s
Time to first token↓ better
Winner1.4 s
1.5 s
Context window↑ better
Winner500k
128k
Max output↑ better
32k
Winner33k
Input price↓ better
$8.00 / 1M tokens
Winner$0.55 / 1M tokens
Output price↓ better
$40.00 / 1M tokens
Winner$2.19 / 1M tokens
Blended price↓ better
$16.00 / 1M tokens
Winner$0.96 / 1M tokens
License
Proprietary
Open source
Input modalities
text, image
text
Output modalities
text
text
Benchmark showdown
MMLU
Claude 4 Opus
90.0
DeepSeek R1
87.1
MMLU Pro
Claude 4 Opus
79.5
DeepSeek R1
75.9
GPQA
Claude 4 Opus
65.0
DeepSeek R1
71.5
MATH
Claude 4 Opus
88.0
DeepSeek R1
90.2
HumanEval
Claude 4 Opus
95.8
DeepSeek R1
91.0
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
DeepSeek R1
Strengths
- Reasoning at GPT-class scores
- Open weights
- Cheap
Weaknesses
- Slower than non-reasoning peers
Best for
- Self-hosted reasoning
- Math & code
- Cost-sensitive agents
Quick verdict
- Pick Claude 4 Opus if you want it smarter and longer context.
- Pick DeepSeek R1 if you want it faster and cheaper.
Auto-generated from the spec sheet. Always validate on your own evals.
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