Compare · ModelsLive · 2 picked · head to head
DeepSeek V4.1 Flash vs GPT-5
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
DeepSeek V4.1 Flash wins on 11/13 benchmarks
DeepSeek V4.1 Flash wins 11 of 13 shared benchmarks. Leads in agentic · reasoning · knowledge.
Category leads
agentic·DeepSeek V4.1 Flashreasoning·DeepSeek V4.1 Flashknowledge·DeepSeek V4.1 Flashgeneral·DeepSeek V4.1 Flashmath·DeepSeek V4.1 Flash
Hype vs Reality
Attention vs performance
DeepSeek V4.1 Flash
#97 by perf·#4 by attention
GPT-5
#116 by perf·#9 by attention
Best value
DeepSeek V4.1 Flash
18.9x better value than GPT-5
DeepSeek V4.1 Flash
175.1 pts/$
$0.31/M
GPT-5
9.3 pts/$
$5.63/M
Vendor risk
Mixed exposure
One or more vendors flagged
DeepSeek
$3.4B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
13 benchmarks · 2 models
DeepSeek V4.1 FlashGPT-5
APEX-Agents
DeepSeek V4.1 Flash leads by +21.2
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
DeepSeek V4.1 Flash
39.5
GPT-5
18.3
ARC-AGI
DeepSeek V4.1 Flash leads by +28.8
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
DeepSeek V4.1 Flash
94.5
GPT-5
65.7
ARC-AGI-2
DeepSeek V4.1 Flash leads by +63.1
ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data.
DeepSeek V4.1 Flash
72.9
GPT-5
9.9
Chess Puzzles
DeepSeek V4.1 Flash leads by +8.3
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
DeepSeek V4.1 Flash
45.3
GPT-5
37.0
Dtbench
GPT-5 leads by +1.3
DeepSeek V4.1 Flash
83.1
GPT-5
84.5
FrontierMath-Tier-4-v2-Private
DeepSeek V4.1 Flash leads by +4.9
DeepSeek V4.1 Flash
26.8
GPT-5
21.9
FrontierMath-Tiers-1-3-v2-Private
DeepSeek V4.1 Flash leads by +12.5
DeepSeek V4.1 Flash
70.9
GPT-5
58.4
GPQA diamond
DeepSeek V4.1 Flash leads by +5.1
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
DeepSeek V4.1 Flash
90.0
GPT-5
85.0
Lmca
DeepSeek V4.1 Flash leads by +8.2
DeepSeek V4.1 Flash
55.3
GPT-5
47.0
Mystery Game Puzzles
DeepSeek V4.1 Flash leads by +22.0
DeepSeek V4.1 Flash
37.2
GPT-5
15.2
OTIS Mock AIME 2024-2025
DeepSeek V4.1 Flash leads by +7.0
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
DeepSeek V4.1 Flash
98.3
GPT-5
91.4
Proofbench
DeepSeek V4.1 Flash leads by +36.0
DeepSeek V4.1 Flash
54.0
GPT-5
18.0
SimpleQA Verified
GPT-5 leads by +7.7
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
DeepSeek V4.1 Flash
42.9
GPT-5
50.6
Full benchmark table
| Benchmark | DeepSeek V4.1 Flash | GPT-5 |
|---|---|---|
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 39.5 | 18.3 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 94.5 | 65.7 |
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. | 72.9 | 9.9 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 45.3 | 37.0 |
Dtbench | 83.1 | 84.5 |
FrontierMath-Tier-4-v2-Private | 26.8 | 21.9 |
FrontierMath-Tiers-1-3-v2-Private | 70.9 | 58.4 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 90.0 | 85.0 |
Lmca | 55.3 | 47.0 |
Mystery Game Puzzles | 37.2 | 15.2 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 98.3 | 91.4 |
Proofbench | 54.0 | 18.0 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 42.9 | 50.6 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.05 | $0.57 | 1.0M tokens (~524 books) | $1.80 | |
| $1.25 | $10.00 | 400K tokens (~200 books) | $34.38 |