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AI Models · Compare

Claude 4 Opus vs DeepSeek R1

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.

Open docs
DeepSeek

DeepSeek R1

Open sourceJan 2025

Open-weights reasoning model that matches o1 at 1/25 the price.

Open docs

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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