Compare · ModelsLive · 2 picked · head to head
Claude Opus 5 vs DeepSeek V4.1 Flash 1017
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 5 wins on 8/11 benchmarks
Claude Opus 5 wins 8 of 11 shared benchmarks. Leads in reasoning · knowledge · math.
Category leads
agentic·DeepSeek V4.1 Flash 1017reasoning·Claude Opus 5knowledge·Claude Opus 5math·Claude Opus 5general·Claude Opus 5
Hype vs Reality
Attention vs performance
Claude Opus 5
#23 by perf·#5 by attention
DeepSeek V4.1 Flash 1017
#41 by perf·#4 by attention
Best value
DeepSeek V4.1 Flash 1017
55.3x better value than Claude Opus 5
Claude Opus 5
4.6 pts/$
$15.00/M
DeepSeek V4.1 Flash 1017
254.9 pts/$
$0.25/M
Vendor risk
Mixed exposure
One or more vendors flagged
Anthropic
$965.0B·Tier 1
DeepSeek
$3.4B·Tier 1
Head to head
11 benchmarks · 2 models
Claude Opus 5DeepSeek V4.1 Flash 1017
APEX-Agents
DeepSeek V4.1 Flash 1017 leads by +4.0
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Claude Opus 5
65.8
DeepSeek V4.1 Flash 1017
69.8
ARC-AGI
Claude Opus 5 leads by +3.0
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
Claude Opus 5
97.5
DeepSeek V4.1 Flash 1017
94.5
ARC-AGI-2
Claude Opus 5 leads by +12.4
ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data.
Claude Opus 5
90.4
DeepSeek V4.1 Flash 1017
78.1
Chess Puzzles
DeepSeek V4.1 Flash 1017 leads by +3.1
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Claude Opus 5
40.0
DeepSeek V4.1 Flash 1017
43.2
FrontierMath-Tier-4-v2-Private
Claude Opus 5 leads by +26.8
Claude Opus 5
73.2
DeepSeek V4.1 Flash 1017
46.3
FrontierMath-Tiers-1-3-v2-Private
Claude Opus 5 leads by +15.1
Claude Opus 5
90.1
DeepSeek V4.1 Flash 1017
75.0
GPQA diamond
Claude Opus 5 leads by +1.0
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Opus 5
95.7
DeepSeek V4.1 Flash 1017
94.7
Mystery Game Puzzles
Claude Opus 5 leads by +11.0
Claude Opus 5
54.8
DeepSeek V4.1 Flash 1017
43.8
OTIS Mock AIME 2024-2025
DeepSeek V4.1 Flash 1017 leads by +0.5
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Opus 5
98.9
DeepSeek V4.1 Flash 1017
99.4
SimpleQA Verified
Claude Opus 5 leads by +17.4
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Claude Opus 5
59.9
DeepSeek V4.1 Flash 1017
42.5
WeirdML v3
Claude Opus 5 leads by +14.0
Claude Opus 5
36.1
DeepSeek V4.1 Flash 1017
22.1
Full benchmark table
| Benchmark | Claude Opus 5 | DeepSeek V4.1 Flash 1017 |
|---|---|---|
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 65.8 | 69.8 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 97.5 | 94.5 |
ARC-AGI-2 ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data. | 90.4 | 78.1 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 40.0 | 43.2 |
FrontierMath-Tier-4-v2-Private | 73.2 | 46.3 |
FrontierMath-Tiers-1-3-v2-Private | 90.1 | 75.0 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 95.7 | 94.7 |
Mystery Game Puzzles | 54.8 | 43.8 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 98.9 | 99.4 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 59.9 | 42.5 |
WeirdML v3 | 36.1 | 22.1 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $5.00 | $25.00 | 1.0M tokens (~500 books) | $100.00 | |
| $0.01 | $0.50 | 1.0M tokens (~524 books) | $1.29 |
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